Excited state absorption of DNA bases in the gas phase and in chloroform solution: a comparative quantum mechanical study (145 views)
Phys Chem Chem Phys (ISSN: 1463-9076linking, 1463-9084electronic), 2022 Feb 23; 24(8): 4987-5000.
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Paper type: Journal Article,
Impact factor: 3.676, 5-year impact factor: 3.859
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Keywords: Chloroform, Cytosine, Dna, Guanine, Quantum Theory, Thymine,
Affiliations:
*** IBB - CNR ***
DTU Chemistry, Technical University of Denmark, 2800 Kongens Lyngby, Denmark. soco@kemi.dtu.dk.
Department of Chemistry, NTNU - Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
Scuola Normale Superiore, Piazza dei Cavalieri, 7, I-56126, Pisa, Italy. henrik.koch@sns.it.
Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), Area della Ricerca del CNR, I-56124 Pisa, Italy. fabrizio.santoro@iccom.cnr.it.
Istituto di Biostrutture e Bioimmagini-CNR, I-80134 Napoli, Italy. robimp@unina.it.
References:
Not available.
Phys Chem Chem Phys (ISSN: 1463-9076linking, 1463-9084electronic), 2022 Feb 23; 24(8): 4987-5000.
Export to BibTeX Export to EndNote
Paper type: Journal Article,
Impact factor: 3.676, 5-year impact factor: 3.859
Url: Not available.
Keywords: Chloroform, Cytosine, Dna, Guanine, Quantum Theory, Thymine,
Affiliations:
*** IBB - CNR ***
DTU Chemistry, Technical University of Denmark, 2800 Kongens Lyngby, Denmark. soco@kemi.dtu.dk.
Department of Chemistry, NTNU - Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
Scuola Normale Superiore, Piazza dei Cavalieri, 7, I-56126, Pisa, Italy. henrik.koch@sns.it.
Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), Area della Ricerca del CNR, I-56124 Pisa, Italy. fabrizio.santoro@iccom.cnr.it.
Istituto di Biostrutture e Bioimmagini-CNR, I-80134 Napoli, Italy. robimp@unina.it.
References:
Not available.
Excited state absorption of DNA bases in the gas phase and in chloroform solution: a comparative quantum mechanical study
We study the excited state absorption (ESA) properties of the four DNA bases (thymine, cytosine, adenine, and guanine) by different single reference quantum mechanical methods, namely, equation of motion coupled cluster singles and doubles (EOM-CCSD), singles, doubles and perturbative triples (EOM-CC3), and time-dependent density functional theory (TD-DFT), with the long-range corrected CAM-B3LYP functional. Preliminary results at the Tamm-Dancoff (TDA) CAM-B3LYP level using the maximum overlap method (MOM) are reported for thymine. In the gas phase, the three methods predict similar One Photon Absorption (OPA) spectra, which are consistent with the experimental results and with the most accurate computational studies available in the literature. The ESA spectra are then computed for the ππ* states (one for pyrimidine, two for purines) associated with the lowest-energy absorption band, and for the close-lying nπ* state. The EOM-CC3, EOM-CCSD and CAM-B3LYP methods provide similar ESA spectral patterns, which are also in qualitative agreement with literature RASPT2 results. Once validated in the gas phase, TD-CAM-B3LYP has been used to compute the ESA in chloroform, including solvent effects by the polarizable continuum model (PCM). The predicted OPA and ESA spectra in chloroform are very similar to those in the gas phase, most of the bands shifting by less than 0.1 eV, with a small increase of the intensities and a moderate destabilization of the nπ* state. Finally, ESA spectra have been computed from the minima of the lowest energy ππ* state, and found in line with the available experimental transient absorption spectra of the nucleosides in solution, providing further validation of our computational approach.
We study the excited state absorption (ESA) properties of the four DNA bases (thymine, cytosine, adenine, and guanine) by different single reference quantum mechanical methods, namely, equation of motion coupled cluster singles and doubles (EOM-CCSD), singles, doubles and perturbative triples (EOM-CC3), and time-dependent density functional theory (TD-DFT), with the long-range corrected CAM-B3LYP functional. Preliminary results at the Tamm-Dancoff (TDA) CAM-B3LYP level using the maximum overlap method (MOM) are reported for thymine. In the gas phase, the three methods predict similar One Photon Absorption (OPA) spectra, which are consistent with the experimental results and with the most accurate computational studies available in the literature. The ESA spectra are then computed for the ππ* states (one for pyrimidine, two for purines) associated with the lowest-energy absorption band, and for the close-lying nπ* state. The EOM-CC3, EOM-CCSD and CAM-B3LYP methods provide similar ESA spectral patterns, which are also in qualitative agreement with literature RASPT2 results. Once validated in the gas phase, TD-CAM-B3LYP has been used to compute the ESA in chloroform, including solvent effects by the polarizable continuum model (PCM). The predicted OPA and ESA spectra in chloroform are very similar to those in the gas phase, most of the bands shifting by less than 0.1 eV, with a small increase of the intensities and a moderate destabilization of the nπ* state. Finally, ESA spectra have been computed from the minima of the lowest energy ππ* state, and found in line with the available experimental transient absorption spectra of the nucleosides in solution, providing further validation of our computational approach.
Excited state absorption of DNA bases in the gas phase and in chloroform solution: a comparative quantum mechanical study
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Excited state absorption of DNA bases in the gas phase and in chloroform solution: a comparative quantum mechanical study
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Impact Factor: 20.233
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Cimino P, Improta R, Bifulco G, Riccio R, Gomez-paloma L, Barone V
* Nucleophilic Cyclopropane Ring Opening in Duocarmycin SA Derivatives by Methanol under Acid Conditions: A Quantum Mechanical Study in the Gas-Phase and in Solution (884 views)
J Org Chem (ISSN: 0022-3263, 0022-3263linking), 2004; 69(8): 2816-2824.
Impact Factor: 3.462
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Mansi R, Tesauro D, De Capua A, Fattorusso R, Carac C, Aloj L, Benedetti E, Morelli G
* Peptide-chelating agent conjugate for selective targeting of somatostatin receptor type 1: Synthesis and characterization (621 views)
Biopolymers (ISSN: 0006-3525, 0006-6352, 0006-3525print), 2004; 76(6): 527-534.
Impact Factor: 2.863
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Improta R, Mele F, Crescenzi O, Benzi C, Barone V
* Understanding the role of stereoelectronic effects in determining collagen stability. 2. A quantum mechanical/molecular mechanical study of (Proline-Proline-Glycine)n polypeptides (543 views)
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 1520-5126), 2002 Jul 3; 124(26): 7857-7865.
Impact Factor: 6.201
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Benzi C, Improta R, Scalmani G, Barone V
* Quantum mechanical study of the conformational behavior of proline and 4R-hydroxyproline dipeptide analogues in vacuum and in aqueous solution (515 views)
J Comput Chem (ISSN: 0192-8651, 1096-987xelectronic), 2002 Feb; 23(3): 341-350.
Impact Factor: 2.931
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Rossi F, Saviano M, Di Talia P, Di Blasio B, Pedone C, Zanotti G, Mosca M, Saviano G, Tancredi T, Ziegler K, Benedetti E
Solution and solid state structure of an aib-containing cyclodecapeptide inhibiting the cholate uptake in hepatocytes (1264 views)
Biopolymers (ISSN: 0006-3525, 0006-6352, 0006-3525print), 1996; 40(5): 465-478.
Impact Factor: 2.425
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* The Excited State Dynamics of a Mutagenic Cytidine Etheno Adduct Investigated by Combining Time-Resolved Spectroscopy and Quantum Mechanical Calculations (184 views)
J Phys Chem Lett (ISSN: 1948-7185linking, 1948-7185electronic), 2022 Jan 13; 13(1): 251-257.
Impact Factor: 6.475
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Balanikas E, Martinez-fernandez L, Improta R, Podbevšek P, Baldacchino G, Markovitsi D
* The Structural Duality of Nucleobases in Guanine Quadruplexes Controls Their Low-Energy Photoionization (117 views)
J Phys Chem Lett (ISSN: 1948-7185linking, 1948-7185electronic), 2021 Sep 2; 12(34): 8309-8313.
Impact Factor: 6.475
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Green JA, Asha H, Santoro F, Improta R
* Excitonic Model for Strongly Coupled Multichromophoric Systems: The Electronic Circular Dichroism Spectra of Guanine Quadruplexes as Test Cases (294 views)
J Chem Theory Comput (ISSN: 1549-9618linking, 1549-9626electronic), 2021 Jan 12; 17(1): 405-415.
Impact Factor: 5.39
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Martínez-fernández L, Esposito L, Improta R
* Studying the excited electronic states of guanine rich DNA quadruplexes by quantum mechanical methods: main achievements and perspectives (215 views)
Photochem Photobiol Sci (ISSN: 1474-905xlinking), 2020 Apr 15; 19(4): 436-444.
Impact Factor: 2.831
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Green JA, Improta R
* Vibrations of the guanine-cytosine pair in chloroform: an anharmonic computational study (201 views)
Phys Chem Chem Phys (ISSN: 1463-9076linking, 1463-9084electronic), 2020 Mar 11; 22(10): 5509-5522.
Impact Factor: 3.52
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Martinez-fernandez L, Gustavsson T, Diederichsen U, Improta R
* Excited State Dynamics of 8-Vinyldeoxyguanosine In Aqueous Solution Studied by Time-Resolved Fluorescence Spectroscopy and Quantum Mechanical Calculations (172 views)
Molecules (ISSN: 1420-3049linking, 1420-3049electronic), 2020 Feb 13; 25(4): N/D-N/D.
Impact Factor: 3.267
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Martinez-fernandez L, Banyasz A, Markovitsi D, Improta R
* Topology Controls the Electronic Absorption and Delocalization of Electron Holes in Guanine Quadruplexes (613 views)
Chemistry (ISSN: 1521-3765electronic, 0947-6539linking), 2018 Oct 12; 24(57): 15185-15189.
Impact Factor: 5.476
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Banyasz A, Martinez-fernandez L, Improta R, Ketola TM, Balty C, Markovitsi D
* Radicals generated in alternating guanine-cytosine duplexes by direct absorption of low-energy UV radiation (386 views)
Phys Chem Chem Phys (ISSN: 1463-9084electronic, 1463-9076linking), 2018 Aug 22; 20(33): 21381-21389.
Impact Factor: 3.454
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Chawla M, Autiero I, Oliva R, Cavallo L
Energetics and dynamics of the non-natural fluorescent 4AP: DAP base pair (70 views)
Phys Chem Chem Phys (ISSN: 1463-9076linking), 2018 Jan 31; 20 (5 ): 3699-3709.
Impact Factor:
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Martinez-fernandez L, Prampolini G, Cerezo J, Liu Y, Santoro F, Improta R
* Solvent effect on the energetics of proton coupled electron transfer in guanine-cytosine pair in chloroform by mixed explicit and implicit solvation models (199 views)
Chem Phys (ISSN: 0301-0104), 2018; 515: 493-501.
Impact Factor: 2.843
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Conti I, Martinez-fernandez L, Esposito L, Hofinger S, Nenov A, Garavelli M, Improta R
* Multiple Electronic and Structural Factors Control Cyclobutane Pyrimidine Dimer and 6-4 Thymine-Thymine Photodimerization in a DNA Duplex (1265 views)
Chemistry (ISSN: 0947-6539, 1521-3765, 1521-3765electronic), 2017 Oct 26; 23(60): 15177-15188.
Impact Factor: 5.16
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Deplano A, Morgillo CM, Demurtas M, Bjorklund E, Cipriano M, Svensson M, Hashemian S, Smaldone G, Pedone E, Luque FJ, Cabiddu MG, Novellino E, Fowler CJ, Catalanotti B, Onnis V
* Novel propanamides as fatty acid amide hydrolase inhibitors (515 views)
Eur J Med Chem (ISSN: 0223-5234, 1768-3254, 0223-5234linking), 2017 Aug 18; 136: 523-542.
Impact Factor: 4.816
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Magrì A, Tabbì G, Breglia R, De Gioia L, Fantucci P, Bruschi M, Bonomo RP, La Mendola D
* Copper ion interaction with the RNase catalytic site fragment of the angiogenin protein: an experimental and theoretical investigation (1289 views) (PDF 210 views)
Dalton T (ISSN: 1477-9226, 1477-9234, 1477-9226linking), 2017 Jul 04; 46(26): 8524-8538.
Impact Factor: 4.099
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Martinez-fernandez L, Improta R
* Novel adenine/thymine photodimerization channels mapped by PCM/TD-DFT calculations on dApT and TpdA dinucleotides (637 views)
Photoch Photobio Sci (ISSN: 1474-905x), 2017 Jun 22; 16(8): 1277-1283.
Impact Factor: 2.902
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Martinez-fernandez L, Pepino AJ, Segarra-marti J, Jovaisaite J, Vaya I, Nenov A, Markovitsi D, Gustavsson T, Banyasz A, Garavelli M, Improta R
* Photophysics of Deoxycytidine and 5-Methyldeoxycytidine in Solution: A Comprehensive Picture by Quantum Mechanical Calculations and Femtosecond Fluorescence Spectroscopy (385 views)
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 0002-7863print), 2017 Jun 14; 139(23): 7780-7791.
Impact Factor: 14.357
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Martínez-fernández L, Granucci G, Pollum M, Crespo-hernández CE, Persico M, Corral I
* Decoding the Molecular Basis for the Population Mechanism of the Triplet Phototoxic Precursors in UVA Light-Activated Pyrimidine Anticancer Drugs (600 views)
Chemistry (ISSN: 0947-6539, 1521-3765, 1521-3765electronic), 2017; 23(11): 2619-2627.
Impact Factor: 5.16
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Zhang Y, De La Harpe K, Beckstead AA, Martínez-fernández L, Improta R, Kohler B
* Excited-State Dynamics of DNA Duplexes with Different H-Bonding Motifs (670 views)
J Phys Chem Lett (ISSN: 1948-7185, 1948-7185electronic, 1948-7185linking), 2016; 7(6): 950-954.
Impact Factor: 9.353
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Improta R, Santoro F, Blancafort L
* Quantum Mechanical Studies on the Photophysics and the Photochemistry of Nucleic Acids and Nucleobases (1782 views)
Chem Rev (ISSN: 0009-2665), 2016; 116(6): 3540-3593.
Impact Factor: 47.928
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Zhang Y, de La Harpe K, Beckstead AA, Improta R, Kohler B
* UV-Induced Proton Transfer between DNA Strands (742 views) (PDF 272 views)
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 0002-7863print), 2015 Jun 10; 137(22): 7059-7062.
Impact Factor: 13.038
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Petrone A, Cerezo J, Ferrer FJA, Donati G, Improta R, Rega N, Santoro F
* Absorption and emission spectral shapes of a prototype dye in water by combining classical/dynamical and quantum/static approaches (734 views)
J Phys Chem A (ISSN: 1089-5639, 1520-5215electronic, 1089-5639linking), 2015; 119(21): 5426-5438.
Impact Factor: 2.883
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Huix-Rotllant M, Brazard J, Improta R, Burghardt I, Markovitsi D
* Stabilization of mixed frenkel-charge transfer excitons extended across both strands of guanine-cytosine DNA duplexes (702 views)
J Phys Chem Lett (ISSN: 1948-7185, 1948-7185electronic, 1948-7185linking), 2015; 6(12): 2247-2251.
Impact Factor: 8.539
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Changenet-Barret P, Gustavsson T, Improta R, Markovitsi D
* Ultrafast Excited-State Deactivation of 8-Hydroxy-2′-deoxyguanosine Studied by Femtosecond Fluorescence Spectroscopy and Quantum-Chemical Calculations (1071 views)
J Phys Chem A (ISSN: 1089-5639, 1520-5215electronic, 1089-5639linking), 2015; 119(23): 6131-6139.
Impact Factor: 2.883
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Zhang Y, Dood J, Beckstead AA, Li X-B, Nguyen KV, Burrows CJ, Improta R, Kohler B
* Efficient UV-induced charge separation and recombination in an 8-oxoguanine-containing dinucleotide (617 views)
P Natl Acad Sci Usa (ISSN: 0027-8424, 1091-6490, 0027-8424print), 2014 Sep 12; 111(32): 11612-11617.
Impact Factor: 9.674
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Improta R
* Quantum mechanical calculations unveil the structure and properties of the absorbing and emitting excited electronic states of guanine quadruplex (925 views)
Chemistry (ISSN: 0947-6539, 1521-3765, 1521-3765electronic), 2014 Jun 23; 20(26): 8106-8115.
Impact Factor: 5.731
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Zhang Y, Improta R, Kohler B
Mode-specific vibrational relaxation of photoexcited guanosine 5'-monophosphate and its acid form: a femtosecond broadband mid-IR transient absorption and theoretical study (415 views)
Phys Chem Chem Phys (ISSN: 1463-9076, 1463-3907, 1463-9084electronic), 2014 Jan 28; 16(4): 1487-1499.
Impact Factor: 4.493
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Travaglia A, La Mendola D, Magrì A, Pietropaolo A, Nicoletti VG, Grasso G, Malgieri G, Fattorusso R, Isernia C, Rizzarelli E
* Zinc(II) interactions with brain-derived neurotrophic factor N-terminal peptide fragments: inorganic features and biological perspectives (1059 views)
Inorg Chem (ISSN: 1520-510x, 0020-1669, 1520-510xelectronic), 2013 Oct 7; 52(19): 11075-11083.
Impact Factor: 4.794
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Banyasz A, Gustavsson T, Onidas D, Changenet-Barret P, Markovitsi D, Improta R
* Multi-pathway excited state relaxation of adenine oligomers in aqueous solution: A joint theoretical and experimental study (624 views)
Chemistry (ISSN: 0947-6539, 1521-3765, 1521-3765electronic), 2013 Mar; 19(11): 3762-3774.
Impact Factor: 5.696
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Gustavsson T, Sarkar S, Vaya I, Jimenez MC, Markovitsi D, Improta R
* A joint experimental/theoretical study of the ultrafast excited state deactivation of deoxyadenosine and 9-methyladenine in water and acetonitrile (526 views)
Photochem Photobiol Sci (ISSN: 1474-905x), 2013; 12(8): 1375-1386.
Impact Factor: 2.939
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Santoro F, Improta R, Avila Ferrer FJ, Segado M, Lami A
* The interplay between neutral exciton and charge transfer states in single-strand polyadenine: A quantum dynamical investigation (751 views)
Photochem Photobiol Sci (ISSN: 1474-905x), 2013; 12(8): 1527-1543.
Impact Factor: 2.939
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Improta R
* Photophysics and photochemistry of thymine deoxy-dinucleotide in water: A PCM/TD-DFT quantum mechanical study (443 views)
J Phys Chem B (ISSN: 1520-6106, 1520-5207, 1520-5207electronic), 2012 Dec 13; 116(49): 14261-14274.
Impact Factor: 3.607
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Banyasz A, Douki T, Improta R, Gustavsson T, Onidas D, Vaya I, Perron M, Markovitsi D
* Electronic excited states responsible for dimer formation upon UV absorption directly by thymine strands: Joint experimental and theoretical study (584 views)
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 1520-5126), 2012 Sep 12; 134(36): 14834-14845.
Impact Factor: 10.677
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Weigel A, Pfaffe M, Sajadi M, Mahrwald R, Improta R, Barone V, Polli D, Cerullo G, Ernsting NP, Santoro F
* Barrierless photoisomerisation of the "simplest cyanine": Joining computational and femtosecond optical spectroscopies to trace the full reaction path (389 views)
Phys Chem Chem Phys (ISSN: 1463-9076, 1463-3907, 1463-9084electronic), 2012; 14(38): 13350-13364.
Impact Factor: 3.829
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Dargiewicz M, Biczysko M, Improta R, Barone V
* Solvent effects on electron-driven proton-transfer processes: Adenine-thymine base pairs (668 views)
Phys Chem Chem Phys (ISSN: 1463-9076, 1463-3907, 1463-9084electronic), 2012; 14(25): 8981-8989.
Impact Factor: 3.829
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Biemann L, Kovalenko SA, Kleinermanns K, Mahrwald R, Markert M, Improta R
* Excited state proton transfer is not involved in the ultrafast deactivation of Guanine-cytosine pair in solution (582 views)
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 1520-5126), 2011 Dec 14; 133(49): 19664-19667.
Impact Factor: 9.907
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Improta R, Barone V
* Interplay between "neutral" and "charge-transfer" excimers rules the excited state decay in adenine-rich polynucleotides (829 views)
Angew Chem Int Ed (ISSN: 1433-7851, 1521-3773electronic, 1433-7851linking), 2011 Dec 9; 50(50): 12016-12019.
Impact Factor: 13.455
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Kállay C, Dávid A, Timári S, Nagy EM, Sanna D, Garribba E, Micera G, De Bona P, Pappalardo G, Rizzarelli E, Sóvágó I
* Copper(II) complexes of rat amylin fragments (589 views)
Dalton T (ISSN: 1477-9234, 1477-9226, 1477-9234electronic), 2011 Oct 14; 40(38): 9711-9721.
Impact Factor: 3.838
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Improta R, Vitagliano L, Esposito L
* Peptide bond distortions from planarity: New insights from quantum mechanical calculations and peptide/protein crystal structures (1671 views)
Plosone (ISSN: 1932-6203, 1932-6203electronic, 1932-6203linking), 2011 Sep 16; 6(9): e24533-e24533.
Impact Factor: 4.092
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Picconi D, Barone V, Lami A, Santoro F, Improta R
* The Interplay between ππ*/nπ* excited states in gas-phase thymine: A quantum dynamical study (480 views)
Chemphyschem (ISSN: 1439-4235, 1439-7641, 1439-7641electronic), 2011 Jul 11; 12(10): 1957-1968.
Impact Factor: 3.412
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Avila FF, Improta R, Santoro F, Barone V
* Computing the inhomogeneous broadening of electronic transitions in solution: A first-principle quantum mechanical approach (437 views)
Phys Chem Chem Phys (ISSN: 1463-9076, 1463-3907, 1463-9084electronic), 2011; 13(38): 17007-17012.
Impact Factor: 3.573
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Banyasz A, Karpati S, Mercier Y, Reguero M, Gustavsson T, Markovitsi D, Improta R
* The peculiar spectral properties of amino-substituted uracils: A combined theoretical and experimental study (544 views)
J Phys Chem B (ISSN: 1520-6106, 1520-5207, 1520-5207electronic), 2010 Oct 7; 114(39): 12708-12719.
Impact Factor: 3.603
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Changenet-Barret P, Emanuele E, Gustavsson T, Improta R, Kotlyar AB, Markovitsi D, Vaya I, Zakrzewska K, Zikich D
* Optical properties of guanine nanowires: Experimental and theoretical study (432 views)
J Phys Chem C (ISSN: 1932-7447), 2010 Sep 2; 114(34): 14339-14346.
Impact Factor: 4.524
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Santoro F, Barone V, Lami A, Improta R
* The excited electronic states of adenine-guanine stacked dimers in aqueous solution: A PCM/TD-DFT study (578 views)
Phys Chem Chem Phys (ISSN: 1463-9076, 1463-3907, 1463-9084electronic), 2010; 12(19): 4934-4948.
Impact Factor: 3.454
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Improta R, Santoro F, Barone V, Lami A
* Vibronic model for the quantum dynamical study of the competition between bright and charge-transfer excited states in single-strand polynucleotides: the adenine dimer case (419 views)
J Phys Chem A (ISSN: 1089-5639, 1520-5215electronic, 1089-5639linking), 2009 Dec 31; 113(52): 15346-15354.
Impact Factor: 2.899
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Improta R, Barone V, Lami A, Santoro F
* Quantum dynamics of the ultrafast ππ*/nπ* population transfer in uracil and 5-fluoro-uracil in water and acetonitrile (389 views)
J Phys Chem B (ISSN: 1520-6106, 1520-5207, 1520-5207electronic), 2009 Oct 29; 113(43): 14491-14503.
Impact Factor: 3.471
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Angeli C, Improta R, Santoro F
* On the controversial nature of the 1 B-1(u) and 2 B-1(u) states of trans-stilbene: The n-electron valence state perturbation theory approach (429 views)
J Chem Phys (ISSN: 0021-9606, 0897-690online, 0021-9606printed), 2009 May 7; 130(17): N/D-N/D.
Impact Factor: 3.093
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Bonomo RP, Di Natale G, Rizzarelli E, Tabbì G, Vagliasindi LI
* Copper(II) complexes of prion protein PEG11-tetraoctarepeat fragment: spectroscopic and voltammetric studies (529 views)
Dalton T (ISSN: 1477-9226, 1477-7922, 1477-9234), 2009 Apr 14; (14): 2637-2646.
Impact Factor: 2.908
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Improta R, Ferrante C, Bozio R, Barone V
* The polarizability in solution of tetra-phenyl-porphyrin derivatives in their excited electronic states: A PCM/TD-DFT study (568 views)
Phys Chem Chem Phys (ISSN: 1463-9076, 1463-3907, 1463-9084electronic), 2009; 11(22): 4664-4673.
Impact Factor: 4.116
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Mercier Y, Santoro F, Reguero M, Improta R
* The decay from the dark nπ* excited state in uracil: An integrated CASPT2/CASSCF and PCM/TD-DFT study in the gas phase and in water (523 views)
J Phys Chem B (ISSN: 1520-6106, 1520-5207, 1520-5207electronic), 2008 Sep 4; 112(35): 10769-10772.
Impact Factor: 4.189
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Santoro F, Barone V, Improta R
* Can TD-DFT calculations accurately describe the excited states behavior of stacked nucleobases? The cytosine dimer as a test case (475 views)
J Comput Chem (ISSN: 0192-8651, 1096-987xelectronic, 0192-8651linking), 2008 Apr 30; 29(6): 957-964.
Impact Factor: 3.39
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Santoro F, Barone V, Gustavsson T, Improta R
* Solvent effect on the singlet excited-state lifetimes of nucleic acid bases: A computational study of 5-fluorouracil and uracil in acetonitrile and water (1297 views)
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 1520-5126), 2006 Dec 20; 128(50): 16312-16322.
Impact Factor: 7.696
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Improta R, Barone V, Scalmani G, Frisch MJ
* A state-specific polarizable continuum model time dependent density functional theory method for excited state calculations in solution (521 views)
J Chem Phys (ISSN: 0021-9606, 0897-690online), 2006 Sep 7; 125(5): N/D-N/D.
Impact Factor: 3.166
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Gustavsson T, Sarkar N, Lazzarotto E, Markovitsi D, Barone V, Improta R
* Solvent effect on the singlet excited-state dynamics of 5-fluorouracil in acetonitrile as compared with water (469 views)
J Phys Chem B (ISSN: 1520-6106, 1520-5207, 1520-5207electronic), 2006 Jul 6; 110(26): 12843-12847.
Impact Factor: 4.115
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Zubrzak P, Banas A, Kaczmarek K, Leplawy MT, Sochacki M, Kowalski ML, Szkudlinska B, Zabrocki J, Di Lello P, Isernia C, Saviano M, Pedone C, Benedetti E
* Analogues of cyclolinopeptide A containing alpha-hydroxymethyl amino acid residues (724 views)
Biopolymers (ISSN: 0006-3525, 0006-6352, 0006-3525print), 2005; 80(2-3): 347-356.
Impact Factor: 2.425
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Improta R, Barone V
* Absorption and fluorescence spectra of uracil in the gas phase and in aqueous solution: A TD-DFT quantum mechanical study (493 views)
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 1520-5126), 2004 Nov 10; 126(44): 14320-14321.
Impact Factor: 6.903
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Improta R, Barone V
* Interplay of electronic, environmental, and vibrational effects in determining the hyperfine coupling constants of organic free radicals (424 views)
Chem Rev (ISSN: 0009-2665), 2004 Mar; 104(3): 1231-1253.
Impact Factor: 20.233
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Cimino P, Improta R, Bifulco G, Riccio R, Gomez-paloma L, Barone V
* Nucleophilic Cyclopropane Ring Opening in Duocarmycin SA Derivatives by Methanol under Acid Conditions: A Quantum Mechanical Study in the Gas-Phase and in Solution (884 views)
J Org Chem (ISSN: 0022-3263, 0022-3263linking), 2004; 69(8): 2816-2824.
Impact Factor: 3.462
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Mansi R, Tesauro D, De Capua A, Fattorusso R, Carac C, Aloj L, Benedetti E, Morelli G
* Peptide-chelating agent conjugate for selective targeting of somatostatin receptor type 1: Synthesis and characterization (621 views)
Biopolymers (ISSN: 0006-3525, 0006-6352, 0006-3525print), 2004; 76(6): 527-534.
Impact Factor: 2.863
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Improta R, Mele F, Crescenzi O, Benzi C, Barone V
* Understanding the role of stereoelectronic effects in determining collagen stability. 2. A quantum mechanical/molecular mechanical study of (Proline-Proline-Glycine)n polypeptides (543 views)
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 1520-5126), 2002 Jul 3; 124(26): 7857-7865.
Impact Factor: 6.201
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Benzi C, Improta R, Scalmani G, Barone V
* Quantum mechanical study of the conformational behavior of proline and 4R-hydroxyproline dipeptide analogues in vacuum and in aqueous solution (515 views)
J Comput Chem (ISSN: 0192-8651, 1096-987xelectronic), 2002 Feb; 23(3): 341-350.
Impact Factor: 2.931
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Rossi F, Saviano M, Di Talia P, Di Blasio B, Pedone C, Zanotti G, Mosca M, Saviano G, Tancredi T, Ziegler K, Benedetti E
Solution and solid state structure of an aib-containing cyclodecapeptide inhibiting the cholate uptake in hepatocytes (1264 views)
Biopolymers (ISSN: 0006-3525, 0006-6352, 0006-3525print), 1996; 40(5): 465-478.
Impact Factor: 2.425
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60 Records (57 excluding Abstracts).
Total impact factor: 355.401 (345.05 excluding Abstracts).
Total 5 year impact factor: 402.504 (391.648 excluding Abstracts).
Total impact factor: 355.401 (345.05 excluding Abstracts).
Total 5 year impact factor: 402.504 (391.648 excluding Abstracts).
145 views. Last view on Wednesday 15 January 2025, 22:12:19
ibb.cnr.it
