Charge separation in a conformationally-flexible porphyrin-fullerene dyad synthesised using cross-metathesis-Reference-Cited by-同舟云学术

Charge separation in a conformationally-flexible porphyrin-fullerene dyad synthesised using cross-metathesis

Published:2007-06 Issue:06 Volume:11 Page:455-462
ISSN:1088-4246
Container-title:Journal of Porphyrins and Phthalocyanines
language:en
Short-container-title:J. Porphyrins Phthalocyanines

Author:

Bell Toby D. M.¹,Ghiggino Kenneth P.¹,Haynes Andrew¹,Langford Steven J.²,Woodward Clint P.²

Affiliation:

1. School of Chemistry, University of Melbourne, Parkville, VIC 3010, Australia

2. School of Chemistry, Monash University, Clayton, VIC 3800, Australia

Abstract

The synthesis of a Zn (II) porphyrin-fullerene dyad in which the two chromophore units are tethered by a conformationally-flexible linker, is described. The synthesis is highlighted by the use of a cross metathesis strategy to prepare the linker between the chromophores. Photoexcitation of the Zn (II) porphyrin unit of the dyad in tetrahydrofuran leads to substantial (77%) quenching of porphyrin fluorescence. The multiple exponentials fluorescence decay kinetics observed are attributed to different rates of electron transfer from photoexcited porphyrin to fullerene in the various conformers present. A charge-separated state with a 330 ns lifetime is observed by transient spectroscopy.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Chemistry

Link

https://www.worldscientific.com/doi/pdf/10.1142/S1088424607000527

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