通过两步反应合成了6种二芳基碘鎓盐,研究了4,4′-二乙酰胺基苯基碘六氟磷酸盐的合成,确定了最佳工艺条件:乙酰苯胺与碘酸钾的摩尔比为2.2∶1.0,15 m l乙酸在25℃反应24 h,产率为47.6%。通过应用实验,测试了6种产物的光引发剂性能,对碘...通过两步反应合成了6种二芳基碘鎓盐,研究了4,4′-二乙酰胺基苯基碘六氟磷酸盐的合成,确定了最佳工艺条件:乙酰苯胺与碘酸钾的摩尔比为2.2∶1.0,15 m l乙酸在25℃反应24 h,产率为47.6%。通过应用实验,测试了6种产物的光引发剂性能,对碘鎓盐光引发剂的构效关系进行了探讨。实验证明4种负离子为PF6-和BF4-的产物具有较好光引发性和抗氧阻能力。引入共轭基团的二芳基碘鎓盐其最大吸收波长明显增大,光引发性增强。展开更多
On account of their potential possibility of being used as an ion exchanger the diaryliodine(Ⅲ) salts have attracted our attention.A lot of scientific reports concerning these compounds have been found in literature,...On account of their potential possibility of being used as an ion exchanger the diaryliodine(Ⅲ) salts have attracted our attention.A lot of scientific reports concerning these compounds have been found in literature, but had been hardly touching the thought of the possibility.Some of their basic physico-chemical characteristics are still not reported. In this paper we have studied the effect of water in the iodoniumforming reaction with(IO)2SO4.It has been shown that the overoxidization will be slighter and the productive rate of iodonium salts will be higher when the ratio H2SO4:H2O (in moles) equals approximately 2.7:1.The experiment shows that chloroform and 1, 2-dichloroethane as well as tetrachloromathane have no apparent influence for the iodonium forming reaction and the resulting productive rate. At the same time we synthesized thirty-five species of simple iodinium halides and determined their solubilities in water.The experimental results have shown that the halides get the more deeply colour and the solubilities of the halides apparently decrease in the series of Cl^--Br^--I^- and hydrocarbon-halgen-oxygroup substituted group at the benzen cycle. All of these phenomena reflect the change of chemical bond between R2I^+-X-and may be a useful indication in the synthesis of such a kind of ion exchanger.展开更多
文摘通过两步反应合成了6种二芳基碘鎓盐,研究了4,4′-二乙酰胺基苯基碘六氟磷酸盐的合成,确定了最佳工艺条件:乙酰苯胺与碘酸钾的摩尔比为2.2∶1.0,15 m l乙酸在25℃反应24 h,产率为47.6%。通过应用实验,测试了6种产物的光引发剂性能,对碘鎓盐光引发剂的构效关系进行了探讨。实验证明4种负离子为PF6-和BF4-的产物具有较好光引发性和抗氧阻能力。引入共轭基团的二芳基碘鎓盐其最大吸收波长明显增大,光引发性增强。
文摘On account of their potential possibility of being used as an ion exchanger the diaryliodine(Ⅲ) salts have attracted our attention.A lot of scientific reports concerning these compounds have been found in literature, but had been hardly touching the thought of the possibility.Some of their basic physico-chemical characteristics are still not reported. In this paper we have studied the effect of water in the iodoniumforming reaction with(IO)2SO4.It has been shown that the overoxidization will be slighter and the productive rate of iodonium salts will be higher when the ratio H2SO4:H2O (in moles) equals approximately 2.7:1.The experiment shows that chloroform and 1, 2-dichloroethane as well as tetrachloromathane have no apparent influence for the iodonium forming reaction and the resulting productive rate. At the same time we synthesized thirty-five species of simple iodinium halides and determined their solubilities in water.The experimental results have shown that the halides get the more deeply colour and the solubilities of the halides apparently decrease in the series of Cl^--Br^--I^- and hydrocarbon-halgen-oxygroup substituted group at the benzen cycle. All of these phenomena reflect the change of chemical bond between R2I^+-X-and may be a useful indication in the synthesis of such a kind of ion exchanger.
文摘制备了6种不同结构的二芳基碘鎓盐。通过近红外光谱测定环氧树脂(E-51)在碘鎓盐引发下的环氧转换率,系统考察了在395 nm LED光源辐照下,取代基对二芳基碘鎓盐引发E-51光聚合的影响。通过密度泛函理论对合成的6种碘鎓盐进行分子优化,发现不同的取代基对二芳基碘鎓盐的最低未占分子轨道能级和最高占据分子轨道能级均会产生影响。电化学测试发现,取代基通过对碘鎓盐的还原电势产生影响,进而影响其与光敏剂间的光电荷转移能力。根据Rehm-Weller公式,计算得到了不同取代基的碘鎓盐与异丙基蒽酮间电荷转移的自由能,它们之间的自由能变化值分别为-1.017、-0.720、-0.664、-0.577、-1.140和-0.915 e V,从热力学上讨论了电荷转移的可能性。研究发现不同烷基取代基的碘鎓盐中,烷基空间位阻越小,其光引发速率越快;当碘鎓盐芳环上连接吸电子基团时,光引发速率提高。
