用 13 C NMR,UV- Vis及荧光光谱等研究甲基取代对 2 - [2 -羟基 - 3- (双 (2 -羟乙基 )氨基 ) ]丙氧基硫杂蒽酮光引发剂分子构象及光化学性能的影响 .发现当其 1,3-位均有甲基取代时 ,2 -位烷氧基受邻位两个甲基的空间排斥作用 ,导致其光谱性质和光化学性能异常 Studies on the Conformation of 2 - [2 - hydroxy - 3- (bis (2 - hydroxyethyl) amino)] propoxythioxanthone photoinitiator by 13 C NMR, UV- Vis and Fluorescence Spectroscopy And the photochemical properties of the 2-position alkoxy groups were found to be affected by the steric exclusion of the two methyl groups at the ortho position when all the 1,3-position methyl groups were substituted, resulting in abnormal spectral properties and photochemical properties