Spectroelectrochemical characterization of Si-bridged diphenylamines: Influence of Si-bridging upon electronic structures of diphenylamines

被引：19

作者：

Nakao, H ^{[1
]}

Hayashi, H ^{[1
]}

Okita, K ^{[1
]}

机构：

[1] Japan Chem Innovat Inst, Adv Mat Lab, Tsukuba, Ibaraki 3050047, Japan

来源：

ANALYTICAL SCIENCES | 2001年 / 17卷 / 04期

关键词：

D O I：

10.2116/analsci.17.545

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Spectroelectrochemical properties of monosilane bridged diphenylamine (5,10-dihydro-2,8-diphenyl-5,10,10-trimethylphenazasiline, Phenaz) and disilane bridged diphenylamine (2,8-diphenyl-10,11-dihydro-10,11-disila-5,10,10,11,11-pentamethyldibenzo[b,f]azepine, DSiAzep) were investigated. The electrochemical oxidation of Phenaz was reversible and its cyclic voltammogram was almost the same shape as that of diphenylamine (DPA). The electrochemical oxidation of DSiAzep was followed by irreversible reactions leading to the cleavage of the Si-Si bond. On electrochemical oxidations of Phenaz and DPA, the formation of a stable radical cation was observed with UV-Vis spectroscopy. In comparison with the absorption characteristics of oxidized radical cations, it was seen that the oxidized radical cation of Phenaz was more delocalized than that of DPA. In the same way, absorption characteristics of oxidized DSiAzep were observed to be different from those observed in Phenaz and DPA.

引用

页码：545 / 549

页数：5

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