Direct Observation of Singlet-Singlet Energy Transfer Mediated by an Amidinium Carboxylate Salt Bridge

doi:10.7517/j.issn.1674-0475.2009.06.427

Abstract

Abstract: The Amidinium-Carboxylate salt bridge system bearing a pair of singlet energy transfer donor (naphthalene,NA) and acceptor (anthracene,An),NA-(amidinium-carboxylate)-An was designed and assembled. Steady-state and time-resolved fluorescence studies demonstrate that the singlet-singlet energy transfer from NA to An can occur efficiently within the supramolecular system NA-(amidinium-carboxylate)-An. The efficiency and rate constant are estimated to be larger than 0.99 and 9.9×10⁹s^-1. We infer that the singlet-single energy transfer proceeds via a ‘through-bond’ electron exchange mechanism,and mediated by the amidinium-carboxylate salt bridge.

Key words: amidinium-carboxylate salt bridge, energy transfer, naphthalene, anthracene

CLC Number:

HAN Lei, LI Ying-ying, CHEN Jin-ping, LI Yi. Direct Observation of Singlet-Singlet Energy Transfer Mediated by an Amidinium Carboxylate Salt Bridge[J]. Imaging Science and Photochemistry, 2009, 27(6): 427-434.

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