摘要
通过碘甲烷对1,4,7,10-四氮杂环十二烷(cyclen)进行化学修饰得到甲基取代的N-甲基-1,4,7,10-四氮杂环十二烷(Me-cyclen)。将cyclen和Me-cyclen与HReO_(4)以1∶2的比例进行反应,分别获得化合物(cyclen)(ReO_(4))_(2)(1)和(Me-cyclen)(ReO_(4))_(2)(2)。差示扫描量热法和介电研究发现化合物1和2具有可逆的相变,相变温度为324 K(1)和384 K(2)。以上研究表明:通过对环状有机胺进行化学改性,在降低分子对称性同时可以显著提高该有机-无机杂化材料的相变温度。
A methyl-substituted 1,4,7,10-tetraazacyclododecane(N-methyl-1,4,7,10-tetraazacyclododecane,Me-cyclen)was isolated by chemical modification of 1,4,7,10-tetraazacyclododecane(cyclen)with iodomethane.Reactions of cyclen and Me-cyclen with two equivalents of HReO_(4) led to phase transition molecules(cyclen)(ReO_(4))_(2)(1)and(Me-cyclen)(ReO_(4))_(2)(2),respectively.Differential scanning calorimetry and dielectric studies revealed that compounds 1 and 2 show reversible phase transition with temperatures at 324 K for 1 and 384 K for 2.The research results demonstrate a way that the high-temperature phase transition organic-inorganic hybrid materials can be obtained by reducing molecular symmetry through chemical modification of organic amines.CCDC:2097827,1;2097829,2.
作者
何文慧
叶星
王梓瑜
魏振宏
饶文俊
蔡琥
HE Wen-Hui;YE Xing;WANG Zi-Yu;WEI Zhen-Hong;RAO Wen-Jun;CAI Hu(School of Chemistry and Chemical Engineering,Nanchang University,Nanchang 330031,China)
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2022年第8期1586-1592,共7页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.21865015,22071094,22075123)资助。
关键词
环状有机胺
高铼酸
相变
介电
化学修饰
cyclic organic amine
perrhenic acid
phase transition
dielectric
chemical modification
