Electrochemistry and Electrogenerated Chemiluminescence of Quinoxaline Derivatives

doi:10.1021/jp807202d

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	Electrochemistry and Electrogenerated Chemiluminescence of Quinoxaline Derivatives
	Izadyar, Anahita 1; Omer, Khalid M.1; Liu, Yunqi 2; Chen, Shiyan 2; Xu, Xinjun 2; Bard, Allen J.1
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2008-12-18
卷号	112 期号:50 页码:20027-20032
ISSN号	1932-7447
DOI	10.1021/jp807202d
英文摘要	We report the electrochemistry, spectroscopy, and electrogenerated chemiluminescence (ECL) of donor-acceptor compounds containing a quinoxaline derivative as the central core coupled with fluorene (CFPQ, CFPP, and MFPQ) and triphenylamine moieties (MAPQ). Cyclic voltammetry of all four derivatives show reversible reduction waves (assigned to the formation of the radical anion) localized in the quinoxaline moiety (the acceptor group), whereas oxidation waves show behavior that depends upon the nature of the donor group. With a pair of strong donor groups, triphenylamine, (MAPQ), exhibits a two electron oxidation wave due to the two noninteracting donor moieties. The fluorene derivatives (CFPQ, CFPP, and MFPQ) show less reversible oxidation waves at scan rates of 100 mV/s, but CFPP and CFPQ become reversible at higher scan rates. In their absorbance and emission spectra, all of the compounds, except MFPQ, exhibit large Stokes shifts, which are related to the rearrangement of the excited-state and also to solvent effects. ECL was observed for MAPQ, CFPQ, and CFPP in MeCN/benzene solutions that generally agree with the photoluminescence spectra, suggesting that the energy of annihilation is sufficient to form singlet excited states (the S-route). The ECL of MAPQ was strong enough to be seen with the naked eye. MFPQ did not produce ECL, probably because of the instability of the radical cation.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000261653000034
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/63481]
专题	中国科学院化学研究所
通讯作者	Bard, Allen J.
作者单位	1.Univ Texas Austin, Dept Chem & Biochem, Ctr Electrochem, Austin, TX 78712 USA 2.Chinese Acad Sci, Inst Chem, Natl Lab Mol Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Izadyar, Anahita,Omer, Khalid M.,Liu, Yunqi,et al. Electrochemistry and Electrogenerated Chemiluminescence of Quinoxaline Derivatives[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2008,112(50):20027-20032.
APA	Izadyar, Anahita,Omer, Khalid M.,Liu, Yunqi,Chen, Shiyan,Xu, Xinjun,&Bard, Allen J..(2008).Electrochemistry and Electrogenerated Chemiluminescence of Quinoxaline Derivatives.JOURNAL OF PHYSICAL CHEMISTRY C,112(50),20027-20032.
MLA	Izadyar, Anahita,et al."Electrochemistry and Electrogenerated Chemiluminescence of Quinoxaline Derivatives".JOURNAL OF PHYSICAL CHEMISTRY C 112.50(2008):20027-20032.