Synthesis and use as spin-trap of 5-methyl-5-phosphono-1-pyrroline N-oxide (DHPMPO).: pH dependence of the EPR parameters of the spin adducts

被引：11

作者：

Clément, JL

Barbati, S

Fréjaville, C

Rockenbauer, A

Tordo, P

机构：

[1] Univ Aix Marseille 1, CNRS, UMR 6517, Lab Struct & React Especes Paramagnet, F-13397 Marseille 20, France

[2] Univ Aix Marseille 3, CNRS, UMR 6517, Lab Struct & React Especes Paramagnet, F-13397 Marseille, France

[3] Chem Res Ctr, Inst Chem, H-1525 Budapest, Hungary

来源：

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2 | 2001年 / 09期

关键词：

D O I：

10.1039/b103830n

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

5-Methyl-5-phosphono-1-pyrroline N-oxide (DHPMPO); the acid analogue of DEPMPO; is synthesized by hydrolysis of the diethoxyphosphoryl moiety of DEPMPO. A variety of carbon- and oxygen-centred radicals are trapped with DHPMPO and the corresponding EPR spectra are analysed. We investigate the influence of pH on the coupling-constant-values of DHPMPO-CH3, which behaves like a pH-sensitive probe. The two pK(a)-values (1.31 and 7.58) are obtained from the simultaneous calculation of ten EPR spectra recorded in the pH range 0.5-9, using new two-dimensional simulation software.

引用

页码：1471 / 1475

页数：5