化学修饰1,4,7,10-四氮杂环十二烷提高铼酸化合物的相变温度 |
Chemical Modification of Cyclen to Raise the Phase Transition Temperature of Its Perrhenic Compounds |
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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HReO4以1∶2的比例进行反应,分别获得化合物(cyclen)(ReO4)2(1)和(Me-cyclen)(ReO4)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。 |
关键词: 环状有机胺 高铼酸 相变 介电 化学修饰 |
基金项目: 国家自然科学基金(No.21865015,22071094,22075123)资助 |
Abstract: 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 HReO4 led to phase transition molecules (cyclen)(ReO4)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. |
Keywords: cyclic organic amine perrhenic acid phase transition dielectric chemical modification |
投稿时间:2022-03-21 修订日期:2022-05-07 |
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何文慧,叶星,王梓瑜,魏振宏,饶文俊,蔡琥.化学修饰1,4,7,10-四氮杂环十二烷提高铼酸化合物的相变温度[J].无机化学学报,2022,38(8):1586-1592. |
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Support information: 相关附件: 220126_ESI.docx |
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