Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 3353 - 3358 (1989)
Update date:2022-08-06
Topics:
Aoyama, Takahisa
Yamamoto, Yukio
Hayashi, Koichiro
Pulse radiolysis of tetrahydrofuran (THF) solutions of all-trans α,ω-diphenyl-substituted polyenes, such as 1,4-diphenylbuta-1,3-diene, 1,6-diphenylhexa-1,3,5-triene and 1,8-diphenylocta-1,3,5,7-tetraene, has been undertaken in the absence and presence of Bu4NPF6 and NaBPh4.In the presence of the salts, the absorption maxima of the diphenylpolyene radical anions are shifted to shorter wavelengths by ion pairing with Bu4N+ and Na+ as well as that of the trans-stilbene radical anion previously investigated.When Ph(CH=CH)nPH.- (n=1-4) is paired with Bu4N+, the magnitude of the spectroscopic shift is larger for n=2-4 than for n=1.On the other hand, the magnitude of the spectroscopic shift due to the ion pairing with Na+ decreases with increasing n and becomes very small in the case of n=3 or 4.The decay of the radical anions, which is due to neutralization reactions with THF(H+), is retarded by the addition of the salts.The retarding effect of the salts is attributed to the ion pairing of the reactant ions with the counterions derived from the salts.In acetonitrile solution the absorption spectra and the decay rates of the radical anions are not affected by the addition of the salts, demonstrating that the ion pairing is not important in such a polar solvent.Results for the radical anions of pyrene, perylene and triphenylethylene are presented for the sake of comparison.The appreciable spectroscopic shift due to the ion pairing with the large Bu4N+ ion was found to be characteristic of the diphenylpolyene radical anions.
View MoreTaizhou Shengxing Chempharm Co.,Ltd
Contact:+86-576-88516600
Address:Yantou Chemical Zone Jiaojiang Taizhou Zhejiang China
Contact:+86-021-50792271
Address:Building 24A, 300 Chuantu Road, Chuansha, Pudong new area, Shanghai, China, 201202
Shifang Taifeng New Flame Retardant Co., Ltd
Contact:02884721008
Address:tingjiang industrial park, hefeng town
Contact:+86-22-83718541
Address:32th Floor, Rongqiao Center Intersection of Changjiang Road and Nankai Six Road Nankai District Tianjin 300102, China
SHANDONG QINGYUNCHANGXIN CHEMICAL SCIENCE-TECH CO.,LTD
Contact:86-21-60560171
Address:1689Donghuan Rade,Qingyun County, Dezhou City, Shandong,China
Doi:10.1016/j.bmcl.2010.07.130
(2010)Doi:10.1021/acs.jmedchem.9b00030
(2019)Doi:10.1016/j.tet.2010.08.024
(2010)Doi:10.1021/jo00295a029
(1990)Doi:10.1006/jcat.1998.2044
(1998)Doi:10.1039/c0dt00210k
(2010)
