Počet záznamů: 1

Photoinduced Intramolecular Tryptophan Oxidation and Excited-State Behavior of [Re(L-AA)(CO)3(r-diimine)] þ (L = Pyridine or Imidazole, AA = Tryptophan, Tyrosine, Phenylalanine)

  1. 1.
    0360627 - UFCH-W 2012 RIV US eng J - Článek v odborném periodiku
    Blanco-Rodríguez, A. M. - Towrie, M. - Sýkora, Jan - Záliš, Stanislav - Vlček, Antonín
    Photoinduced Intramolecular Tryptophan Oxidation and Excited-State Behavior of [Re(L-AA)(CO)3(r-diimine)] þ (L = Pyridine or Imidazole, AA = Tryptophan, Tyrosine, Phenylalanine).
    Inorganic Chemistry. Roč. 50, č. 13 (2011), s. 6122-6134 ISSN 0020-1669
    Grant CEP: GA MŠk(CZ) LD11082
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: tryptophan * tyrosine * phenylalanine
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 4.601, rok: 2011

    ReI carbonyl-diimine complexes [Re(L-AA)(CO)3(N,N)]+ (N,N = bpy, phen) containing an aromatic amino acid (AA), phenylalanine (Phe), tyrosine (Tyr), or tryptophan (Trp), linked to Re by a pyridine-amido or imidazole-amido ligand L have been synthesized and their excited-state properties investigated by nanosecond time-resolved IR (TRIR) and emission spectroscopy. Near-UV optical excitation populates a ReI(CO)3→N,N 3MLCT excited state *[ReII(L-AA)(CO)3(N,N•–)]+. Decay to the ground state (50–300 ns lifetime) is the only excited-state deactivation process observed in the case of Phe and Tyr complexes, whereas the Trp-containing species undergo a Trp(indole)→*ReII electron transfer (ET) producing a charge-separated (CS) state, [ReI(L-Trp•+)(CO)3(N,N•–)]+. The ET occurs with a 8–40 ns lifetime depending on L, N,N, and the solvent.
    Trvalý link: http://hdl.handle.net/11104/0006493