Effects of conjugation length, electron donor and acceptor strengths on two-photon absorption cross sections of asymmetric zinc-porphyrin derivatives

The Journal of Chemical Physics
Oscar Rubio-PonsHans Agren

Abstract

Exceptionally large two-photon absorption cross sections at the infrared region have been revealed by time-dependent density functional theory calculations for asymmetric charge-transfer conjugated zinc-porphyrin derivatives. The largest two-photon cross section is found to be more than one order of magnitude larger than for the conventional two-photon active organic molecules. The calculations show that the formation of strong charge-transfer states depends on the length of the conjugation bridge between the zinc-porphyrin core and the electron donor/acceptor. The two-photon absorption cross section can be greatly enhanced by increasing the strengths of the electron donor/acceptor.

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Citations

Nov 10, 2012·Photochemistry and Photobiology·Zhong XuJi-Kang Feng
Feb 14, 2008·Physical Chemistry Chemical Physics : PCCP·Mette JohnsenPeter R Ogilby
Oct 6, 2011·The Journal of Physical Chemistry. B·M G VivasC R Mendonca
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Jul 31, 2014·The Journal of Physical Chemistry. B·Dan WangJi-Kang Feng
Dec 10, 2016·Journal of the American Chemical Society·Tatiana V EsipovaSergei A Vinogradov
Sep 7, 2006·Journal of the American Chemical Society·Ajit BhaskarTheodore Goodson

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