Ultrafast charge transfer dynamics in supramolecular Pt(ii) donor–bridge–acceptor assemblies: the effect of vibronic coupling. (2nd October 2015)

• Record Type: Journal Article
• Authors: Scattergood, Paul A.; Delor, Milan; Sazanovich, Igor V.; Towrie, Michael; Weinstein, Julia A.
• Is Part Of: Faraday discussions. Volume 185(2015)
• Page Start: 69
• Page End: 86
• Publication Date: 2015-10-02
• Subjects: Chemistry -- Periodicals; Metallurgy -- Periodicals; Electrochemistry -- Periodicals; 540
• DOI: 10.1039/c5fd00103j
• Languages: English
• ISSNs: 1359-6640

Abstract

Abstract : Thanks to major advances in laser technologies, recent investigations of the ultrafast coupling of nuclear and electronic degrees of freedom (vibronic coupling) have revealed that such coupling plays a crucial role in a wide range of photoinduced reactions in condensed phase supramolecular systems. This paper investigates several new donor–bridge–acceptor charge-transfer molecular assemblies built on a trans -Pt(ii ) acetylide core. We also investigate how targeted vibrational excitation with low-energy IR light post electronic excitation can perturb vibronic coupling and affect the efficiency of electron transfer (ET) in solution phase . We compare and contrast properties of a range of donor–bridge–acceptor Pt(ii ) trans -acetylide assemblies, where IR excitation of bridge vibrations during UV-initiated charge separation in some cases alters the yields of light-induced product states. We show that branching to multiple product states from a transition state with appropriate energetics is the most rigid condition for the type of vibronic control we demonstrate in our study.