Optical Characteritics of Hyperpolarized Polysulfonium

以甲基苯基硫化物为原料，在酸性介质中氧化合成了芳香磺酸衍生物。通过分子轨道计算证明了化合物的极化结构。合成了（4-甲氧基苯基）二甲基磺酸和（4-甲基噻吩基）甲基磺酸作为超极化芳族磺酸。结果表明，（4-甲基噻吩基）甲基磺酸在360nm紫外光照射下可分解为甲基苯基硫化物。分解促进在乙腈或质子溶剂，如甲醇。采用氧化聚合法制备了具有磺胺和硫醚交替键的聚芳基磺酸。该聚砜可转化为相应的高分子量、高熔融温度的聚硫醚。多磺酸也可在光照射下分解，4-甲基硫-苯基硫苯作为起始低原料，收率为80%。这种光降解也适用于其它工程塑料的化学放大分解。

A new synthesis of aromatic sulfonium derivatives was established by oxidation of methylphenyl sulfide in acidic media. The polarized structure of the sulfonium compounds was proved by their molecular orbital calculation. (4-Methoxyphenyl) dimethyl sulfonium and (4-methylthiophenyl) methyl sulfonium were synthesized as a hyperpolarized aromatic sulfonium. It was found that (4-methylthiophenyl) methyl sulfonium decomposes to methylphenyl sulfide by UV-irradiation (360nm). The decomposition promotes in acetonilrile or protic solvents, such as methanol.Poly (arylene sulfonium) which has sulfonium and thioether bonds alternatively has been prepared by oxidative polymerization. The polysulfonium is feasible to convert to the corresponding polythioether with a high molecular weight and a high melting temperature. The polysulfonium also decomposes by light-irradiation and 4-methylthio-phenylthiobenzene is receovered in 80% yield as a starting low material. This photodegradation is applicable to the chemical amplified decomposition of other engineerng plastics.