A Study on Fluorescence Quenching of Dicyanoanthracene by Acenaphthenone via Electron Transfer──Formation Machanism of Exciplex and Its Kinetics

Chem. J. Chinese Universities ›› 1996, Vol. 17 ›› Issue (4): 562.

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A Study on Fluorescence Quenching of Dicyanoanthracene by Acenaphthenone via Electron Transfer──Formation Machanism of Exciplex and Its Kinetics

WU Shu-Ping¹, JIANG Zhi-Qin¹, YE Jian-Ping²

1. Department of Chemistry, Tongji University, Shanghai 200092;
2. Laboratory of Photochemistry, Institute of Photographic Chemistry, The Chinese Academy of Science

Received:1995-03-28 Online:1996-04-24 Published:1996-04-24

Abstract

Abstract: The kinetics and mechanism of exciplex formation of 9,10-dicyanoanthracene(DCA)by acenaphthenone(ANO) have been studied.The photokinetics of exciplex(ANO/DCA) was determined with transient single-photon counting technique.The measured rateconstants based on biexponential decay reveal that the forward electron transfer(ET) proceeds much faster than the reverse ETand other decay processes while ANOacts as an electron donor.In addition, the diffusion-controlled steady-state fluorescence quenching is mainly caused by ANO/DCAexciplex formation via photoinduced ET.

Key words: Fluorescence quenching, Exciplex, Pliotoinduced electron transfer mechanism, Kinetics

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WU Shu-Ping, JIANG Zhi-Qin, YE Jian-Ping. A Study on Fluorescence Quenching of Dicyanoanthracene by Acenaphthenone via Electron Transfer──Formation Machanism of Exciplex and Its Kinetics[J]. Chem. J. Chinese Universities, 1996, 17(4): 562.

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A Study on Fluorescence Quenching of Dicyanoanthracene by Acenaphthenone via Electron Transfer──Formation Machanism of Exciplex and Its Kinetics

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