Abstract

The reaction of tris(8-carboxy-2,2,6,6-tetramethylbenzo[1,2-d;4,5-d′]bis[1,3]dithiol-4-yl)methanol, diamagnetic precursor of Finland trityl radical} with trifluoroacetic acid gave the corresponding triarylmethyl cation. Nucleophilic quenching of this cation with triethyl phosphite generated trityl radical containing a diethyl phosphonate moiety, and hydrolysis of the latter to phosphonic acid afforded a multifunctional oxygen- and pH-sensitive spin probe.

中文翻译：

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一种多功能自旋探针的简单方便的合成，三芳基甲基系列的持久性自由基的膦酸酯衍生物

摘要

芬兰抗磁性前体三(8-羧基-2,2,6,6-四甲基苯并[1,2- d ;4,5- d ']双[1,3]二硫醇-4-基)甲醇的反应三苯甲基自由基}与三氟乙酸产生相应的三芳基甲基阳离子。该阳离子与亚磷酸三乙酯的亲核猝灭产生含有膦酸二乙酯部分的三苯甲基自由基，后者水解为膦酸提供了多功能的氧和 pH 敏感自旋探针。