Rhodamine 6G Radical: A Spectro (Fluoro) Electrochemical and Transient Spectroscopic Study

被引：21

作者：

Slanina, Tomas ^{[1
,2
,3
]}

Oberschmid, Teresa ^{[4
]}

机构：

[1] Masaryk Univ, Fac Sci, RECETOX, Kamenice 5, Brno 62500, Czech Republic

[2] Masaryk Univ, Dept Chem, Kamenice 5, Brno 62500, Czech Republic

[3] Goethe Univ Frankfurt, Inst Organ Chem & Chem Biol, D-60323 Frankfurt, Germany

[4] Univ Regensburg, Fac Chem & Pharm, Inst Organ Chem, D-93040 Regensburg, Germany

来源：

CHEMCATCHEM | 2018年 / 10卷 / 18期

关键词：

Photocatalysis; photoinduced electron transfer; photoionization; photoelectrochemistry; reactive intermediates; PHOTOINDUCED ELECTRON-TRANSFER; FLUORESCENCE QUANTUM YIELD; EXCITED-STATE DYNAMICS; FLASH-PHOTOLYSIS; AQUEOUS-SOLUTION; REDOX REACTIONS; EUROPIUM IONS; SOLVENT; PHOTOIONIZATION; CELL;

D O I：

10.1002/cctc.201800971

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：

A detailed study on the radical of rhodamine 6G, a key intermediate in photoredox catalysis, is presented. Various methods of its preparation (photoinduced electron transfer, electrochemistry), its spectroscopic characterization, stability, oxidation, photoionization and transient spectroscopic study have been investigated. Photooxidation of reduced rhodamine 6G has been established as a sensitive method for determination of dissolved oxygen. Photoionization of rhodamine 6G radical was found to be strongly solvent-dependent and the released electrons were detected as photoinduced current in a spectroelectrochemical OTTLE cell. This process was identified as an extreme case of consecutive photoinduced electron transfer (conPET) mechanism. The electrofluorochromism of rhodamine 6G radical has been studied by a novel apparatus suitable for simultaneous analysis of electrochemical, absorption and emission properties.

引用

页码：4182 / 4190

页数：9

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