Title

Investigation Of Two-Photon Absorption Properties In Branched Alkene And Alkyne Chromophores

Abstract

Novel alkene and alkyne branched structures have been synthesized, and their two-photon absorption (2PA) properties are reported. This series of alkene and alkyne trimer systems tests the mechanistic approach for enhancing the 2PA process which is usually dictated by the π-bridging, delocalization length, and corresponding charge transfer on the 2PA cross sections. The results suggest that alkene branched systems have higher 2PA cross sections. While steady-state absorption and emission measurements were not successful in predicting the observed trend of 2PA cross sections, time-resolved measurements have explained the trends observed. It was found that, upon photoexcitation, there is an ultrafast charge localization to an intramolecular charge-transfer (ICT) state, followed by the presence of a solvent and conformationally relaxed ICT state in these branched systems. © 2006 American Chemical Society.

Publication Date

9-13-2006

Publication Title

Journal of the American Chemical Society

Volume

128

Issue

36

Number of Pages

11840-11849

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/ja060630m

Socpus ID

33748497615 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33748497615

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