Photoinduced One-Electron Oxidation of Estrone Derivatives: A Combined Steady-State and Time-Resolved Spectroscopy Investigation

被引：0
|
作者：
Quindt, Matias I. [1 ,2 ]
Protti, Stefano [3 ]
Merli, Daniele [4 ]
Bonesi, Sergio M. [1 ,2 ,3 ]
机构：
[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Quim Organ, C1428EGA, Buenos Aires, Argentina
[2] Univ Buenos Aires, Ctr Invest Hidratos Carbono CIHIDECAR, CONICET, C1428EGA, Buenos Aires, Argentina
[3] Univ Pavia, Dept Chem, PhotoGreen Lab, Vle Taramelli 12, I-27100 Pavia, Italy
[4] Univ Pavia, Dept Chem, Vle Taramelli 12, I-27100 Pavia, Italy
来源：
CHEMPHOTOCHEM | 2023年 / 7卷 / 10期
关键词：
Estrones; time-resolved spectroscopy; electron-transfer reactions; radical cations; mesolytic fragmentation; phenoxy radicals; LASER FLASH-PHOTOLYSIS; RADICAL CATIONS; AQUEOUS-SOLUTION; PARASUBSTITUTED PHENOLS; SULFATE RADICALS; PULSE-RADIOLYSIS; RATE CONSTANTS; PERSULFATE; PHOTOCHEMISTRY; INHIBITORS;
D O I：
10.1002/cptc.202300084
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 investigation of the photophysics and of the redox properties of a set of selected estrone carboxylate and sulfonate esters was carried out by means of steady-state and timeresolved spectroscopies. The observed dual fluorescence was assigned to an efficient intramolecular energy transfer from the aromatic moiety to the carbonyl group. On the other hand, the photoinduced monoelectronic oxidation of R OX in the presence of persulphate anion is followed by mesolytic fragmentation of the so generated radical cation into the corresponding phenoxyl radical with rate constant values (k(frag)) of 10(4)-10(5) s(-1), that depend on the X O bond dissociation energy values.
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页数：11
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