Investigations on Organo–Sulfur–Nitrogen Rings and the Thiocyanogen Polymer, (SCN)x
作者:W. Russell Bowman、Colin J. Burchell、Petr Kilian、Alexandra M. Z. Slawin、Philip Wormald、J. Derek Woollins
DOI:10.1002/chem.200501528
日期:2006.8.16
for 1,2,4-thiadiazole and 1,2,4-dithiazole compounds. Peaks in the Raman spectrum in the range 400-480 cm(-1) support the presence of disulfide units within the polymer. The solid-state (13)C NMR (99 % (13)C-labelled) spectrum is dominated by two singlets of equal intensity at approximately 187 and 184 ppm with low intensity peaks in the range 152-172 ppm, in approximately the same range as both 1,2
报道了一系列1,2,4-噻二唑的合成和完整表征。(SCN)(x)已通过多种技术进行了研究,并将数据与1,2,4-噻二唑和1,2,4-二噻唑进行了比较。观察到的数据表明该聚合物由被氮原子连接的1,2,4-二噻唑环组成。对于(SCN)(x),MALDI-TOF质谱显示在1149处有一个母离子和一系列带有(SCN)(2)重复单元(116 m / z)的峰。该结果暗示(SCN)(2)可以是聚合物的单体单元。它的红外光谱显示一个非常宽的峰,最大峰在1134 cm(-1)处,与1,2,4-噻二唑和1,2,4-二噻唑化合物的环振动在同一区域中包含多个重叠峰。拉曼光谱在400-480 cm(-1)范围内的峰支持聚合物中二硫键单元的存在。固态(13)C NMR(99%(13)C标记)光谱由强度大约在187和184 ppm的两个等强度的单重态占据主导,且强度峰值在152-172 ppm范围内,大致相同范围包括1