Porphyrin-Phthalocyanine/Pyridylfullerene Supramolecular Assemblies

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Pereira, AMVM (Autor) Outra; Hausmann, A (Autor) Outra; Tome, JPC (Autor) Outra; Trukhina, O (Autor) Outra; Urbani, M (Autor) Outra; Neves, MGPMS (Autor) Outra; Cavaleiro, JAS (Autor) Outra; Guldi, DM (Autor) Outra; Torres, T (Autor) Outra

Revista

Título: Chemistry - A European Journal

Vol. 18

Páginas: 3210-3219

ISSN: 0947-6539

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 40 Citações

Scopus - 44 Citações

Outras Informações

ID Authenticus: P-002-CDW

DOI: 10.1002/chem.201103776

Abstract (EN): The synthesis and photophysical properties of several porphyrin (P)-phthalocyanine (Pc) conjugates (P-Pc; 1-3) are described, in which the phthalocyanines are directly linked to the beta-pyrrolic position of a meso-tetraphenylporphyrin. Photoinduced energy- and electron-transfer processes were studied through the preparation of H2PZnPc, ZnPZnPc, and PdPZnPc conjugates, and their assembly through metal coordination with two different pyridylfulleropyrrolidines (4 and 5). The resulting electron-donoracceptor hybrids, which were formed by axial coordination of compounds 4 and 5 with the corresponding phthalocyanines, mimicked the fundamental processes of photosynthesis; that is, light harvesting, the transduction of excited-state energy, and unidirectional electron transfer. In particular, photophysical studies confirmed that intramolecular energy-transfer resulted from the S2 excited state as well as from the S1 excited state of the porphyrins to the energetically lower-lying phthalocyanines, followed by an intramolecular charge-transfer to yield PPc.+.C-60(.-). This unique sequence of processes opens the way for solar-energy-conversion processes.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10