Reversible "chiral memory" in ruthenium tris(phenanthroline)- anionic porphyrin complexes(402 views) Randazzo R, Mammana A, D'Urso A, Lauceri R, Purrello R
Angew Chem Int Ed (ISSN: 1433-7851, 1521-3773electronic, 1433-7851linking), 2008; 47(51): 9879-9882.
Dipartimento di Scienze Chimiche, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
Istituto di Biostrutture e Bioimmagini-Sezione di Catania, Consiglio Nazionale Delle Ricerche (CNR), Viale Andrea Doria 6, 95125 Catania, Italy
References: Yashima, E., Maeda, K., Okamoto, Y., (1999) Nature, 399, p. 44
Prins, L.J., De Jong, F., Timmerman, P., Reinhoudt, D.N., (2000) Nature, 408, pp. 181-184
Mizuno, Y., Aida, T., Yamaguchi, K., (2000) J. Am. Chem. Soc, 122, pp. 5278-5285
Ziegler, M., Davis, A.V., Johnson, D.W., Raymond, K.N., (2003) Angew. Chem, 115, pp. 689-692
(2003) Angew. Chem. Int. Ed, 42, pp. 665-668
Ishikawa, M., Maeda, K., Mitsutsuji, Y., Yashima, E., (2004) J. Am. Chem. Soc, 126, pp. 732-733
Onouchi, H., Miyagawa, T., Morino, K., Yashima, E., (2006) Angew. Chem, 118, pp. 2441-2444
(2006) Angew. Chem. Int. Ed, 45, pp. 2381-2384
Bellacchio, E., Lauceri, R., Gurrieri, S., Monsù Scolaro, L., Romeo, A., Purrello, R., (1998) J. Am. Chem. Soc, 120, pp. 12353-12354
Purrello, R., Raudino, A., Monsù Scolaro, L., Loisi, A., Bellacchio, E., Lauceri, R., (2000) J. Phys. Chem. B, 104, pp. 10900-10908
Lauceri, R., Raudino, A., Monsù Scolaro, L., Micali, N., Purrello, R., (2002) J. Am. Chem. Soc, 124, pp. 894-895
Mammana, A., D'Urso, A., Lauceri, R., Purrello, R., (2007) J. Am. Chem. Soc, 129, pp. 8062-8063
Randazzo, R., Lauceri, R., Mammana, A., D'Urso, A., Purrello, R., Chirality, , in press
Zhang, Y., Chen, P., Liu, M., (2008) Chem. Eur. J, 14, pp. 1793-1796
Purrello, R., Bellacchio, E., Gurrieri, S., Lauceri, R., Raudino, A., Monsù Scolaro, L., Santoro, A.M., (1998) J. Phys. Chem. B, 102, pp. 8852-8859
The emission signal of [Ru(phen)3]2+ is centered at 590 nm. Porphyrins have absorption bands (Q bands) in this region. Energy transfer processes have been observed in their complex at pH 7.[3]Ribó, J.M., Crusats, J., Farrera, J.A., Valero, M.L., (1994) J. Chem. Soc. Chem. Commun, pp. 681-682
The formation of the J aggregates is hierarchically controlled. The only way to obtain these species is by allowing porphyrin aggregation with Λ- or Δ-[Ru(phen)3]2+ at a pH value of around 6 and then decreasing the pH to 2.5The CD signal of the (Δ-[Ru(phen)3]2+/H 2TPPS4) complex is absent because the formation of the complex is slow. The signal appears after 10-15 minMemory of chirality is lost if the pH value is raised to 8After about five pH cycles the solution becomes milky and scatters because of the formation of extended aggregates: this causes a decrease of the CD intensityMelting experiments were also performed: the ICD of Λ- or Δ-[Ru(phen)3]2+/J aggregates disappears at around 90 °C. By lowering temperature at 25°C we have obtained the starting signal shapeLauceri, R., Fasciglione, G.F., D'Urso, A., Marini, S., Purrello, R., Coletta, M., (2008) J. Am. Chem. Soc, 130, pp. 10476-10477
Prins, L. J., De Jong, F., Timmerman, P., Reinhoudt, D. N., (2000) Nature, 408, pp. 181-184
Rivera, J. M., Craig, S. L., Martin, T., Rebek Jr., J., (2000) Angew. Chem, 112, pp. 2214-2216
(2000) Angew. Chem. Int. Ed, 39, pp. 2130-2132
(2003) Angew. Chem. Int. Ed, 42, pp. 665-668
(2006) Angew. Chem. Int. Ed, 45, pp. 2381-2384
Reversible "chiral memory" in ruthenium tris(phenanthroline)- anionic porphyrin complexes