PHOTOCHEMICAL FORMATION OF OLIGOTHIOPHENE CATION RADICALS IN ACIDIC SOLUTION AND NAFION

被引:103
作者
ZINGER, B [1 ]
MANN, KR [1 ]
HILL, MG [1 ]
MILLER, LL [1 ]
机构
[1] UNIV MINNESOTA,DEPT CHEM,MINNEAPOLIS,MN 55455
关键词
D O I
10.1021/cm00023a033
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Three alpha-coupled terthiophenes, substituted on the terminal positions with methyl, thiomethyl, or bromo substituents, were photooxidized in a solvent mixture of methylene chloride and trifluoroacetic acid to form cation radicals. Visible, near-IR, and ESR spectra are reported. It is shown that the photooxidation requires oxygen and is acid catalyzed. In acetonitrile/trifluoroacetic acid, cation radical pi-dimers are formed. Using Nafion, stable films of the cation radical dimer or dication of 2,5"-bis(thiomethyl)terthiophene could be formed.
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页码:1113 / 1118
页数:6
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