The FT-EPR spectra of the anthraquinone-2,6-disulfonic acid radicals as probe for local proton concentrations in electron transfer reactions

Geimer J.; Beckert D.

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The FT-EPR spectra of the anthraquinone-2,6-disulfonic acid radicals as probe for local proton concentrations in electron transfer reactions

机译：蒽醌-2,6-二磺酸基团的FT-EPR光谱作为电子转移反应中局部质子浓度的探针

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The radical anion of anthraquinone-2,6-disulfonic acid (2,6-AQDS) and different donor radical cations are formed by electron transfer from various pyrimidines to the laser-induced triplet state of 2,6-AQDS. The electron paramagnetic resonance (EPR) spectrum of the radical anion changes drastically with pH due to different protonated forms of this radical. These EPR spectra were used to define an effective pH value as a measure of the local proton (H3O+) concentration in the surroundings of the 2,6-AQDS radical anion in a unbuffered solution. In some cases this effective pH value was found to be time-dependent reflecting the evolution of the protonation and deprotonation processes of acceptor and donor. [References: 14]

机译：蒽醌-2,6-二磺酸（2,6-AQDS）的自由基阴离子和不同的供体自由基阳离子是通过电子从各种嘧啶转移至激光诱导的2,6-AQDS的三重态而形成的。由于该自由基的质子化形式不同，自由基阴离子的电子顺磁共振（EPR）谱随pH急剧变化。这些EPR光谱用于定义有效pH值，作为在非缓冲溶液中2,6-AQDS自由基阴离子周围环境中局部质子（H3O +）浓度的量度。在某些情况下，发现该有效pH值是时间依赖性的，反映了受体和供体的质子化和去质子化过程的演变。 [参考：14]

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《Applied Magnetic Resonance》 |2000年第4期|共9页
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Geimer J.; Beckert D.;
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中图分类电磁学、电动力学;
关键词
Nanosecond time-scale; Spin-resonance; Paramagnetic-resonance; Photoreduction; Triethylamine; Pairs;

机译：纳秒级时标;自旋共振;顺磁共振;光还原;三乙胺;对;

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1. The FT-EPR spectra of the anthraquinone-2,6-disulfonic acid radicals as probe for local proton concentrations in electron transfer reactions [J] . Geimer J., Beckert D. Applied Magnetic Resonance . 2000,第4期

机译：蒽醌-2,6-二磺酸基团的FT-EPR光谱作为电子转移反应中局部质子浓度的探针
2. Radicals formed by electron transfer cytosine and 1-methylcytosine to the triplet state of anthraquinone-2,6-disulfonic acid. A Fourier-transform EPR study [J] . J.Geimer, K.Hidenbrand, S.Naumov, Physical chemistry chemical physics: PCCP . 2000,第18期

机译：由电子将胞嘧啶和1-甲基胞嘧啶转移至蒽醌-2,6-二磺酸的三重态而形成的自由基。傅里叶变换EPR研究
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4. Ion/Ion Proton-Transfer Reaction for Improved Negative-Ion Electron Capture Dissociation Efficiency in the Structural Characterization of Nucleic Acids and Proteins [C] . Kevin M. Ileka, Jeremy J. Wolff, Kristina Hakansson ASMS Conference on Mass Spectrometry and Allied Topics . 2016

机译：离子/离子质子转移反应，用于改善的负离子电子捕获核酸和蛋白质结构表征的解离效率
5. Reaction Enthalpy and Volume Profiles for Excited State Reactions Involving Electron Transfer and Proton-Coupled Electron Transfer. [D] . Maza, William A. 2013

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The FT-EPR spectra of the anthraquinone-2,6-disulfonic acid radicals as probe for local proton concentrations in electron transfer reactions

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