Porphyrin-Phthalocyanine/Pyridylfullerene Supramolecular Assemblies

• Type: Article in International Scientific Journal
• Date: 2012

Authors

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

Journal

Title: Chemistry - A European Journal

Vol. 18

Pages: 3210-3219

ISSN: 0947-6539

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 40 Citations

Scopus - 44 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10