| 新颖的大环冠醚基对碘苯胺包合物：设计合成、晶体结构及介电性质 |
| A Novel Supramolecular Compound with 4-Iodobenzenaminium Based on 18-Crown-6：Synthesis, Structure and Dielectric Properties |
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| 摘要: 合成了新颖的有机-无机杂化超分子化合物,[(4-IA-NH3)·(18-crown-6)]2·(Cu2Cl6) (1),4-IA-NH3=对碘苯胺离子,18-crown-6=18-冠-6。并通过红外光谱、粉末衍射、热重分析和单晶结构分析对化合物进行了充分表征。在转子定子型的超分子化合物1中,[(4-IA-NH3)·(18-crown-6)]-超分子阳离子和(Cu2Cl6)2-阴离子交错堆积形成包合物结构。变温介电常数测量表明,在130~450 K范围内没有相变引起的介电异样。大环醚的热无序运动及由此引起的氢键偶极瞬间变化使得化合物在低频500 Hz和高温350 K以上具有较高的介电常数并伴随高的介电损耗。 |
| 关键词: 包合物 冠醚 大环 晶体结构 介电 |
| 基金项目: 新世纪优秀人才计划和教育部博士点基金资助项目。 |
| Abstract: One novel organic-inorganic hybrid supramolecular compound, ([(4-IA-NH3)·(18-crown-6)]2·(Cu2Cl6) (1), has been synthesized and characterized by IR spectroscopy, XRPD, thermogravimetric analysis and single crystal X-ray diffraction (where 4-IA-NH3+=4-iodobenzenaminium; 18-crown-6=1,4,7,10,13,16-hexaoxacyclooctadecane). The organic [(4-IA-NH3)·(18-crown-6)]+ cation assemblies and inorganic Cu2Cl62- anions arrange alternately to build the macrocycle-based rotator-stator supramolecular inclusion. Temperature-dependent dielectric constants of compound 1 show no distinct dielectric anomalies, suggesting no phase transition within the measured temperature range (130~450 K). A high dielectric constant above 350 K at a low frequency of 500 Hz suggests that the increase in the disorder molecular thermal motion and/or H-bonding dipole interactions. CCDC: 919514. |
| Keywords: inclusion compound crown ether macrocycle crystal structure permittivity |
| 投稿时间：2013-01-17 修订日期：2013-05-30 |
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| 周琴琴,付大伟.新颖的大环冠醚基对碘苯胺包合物：设计合成、晶体结构及介电性质[J].无机化学学报,2013,29(8):1696-1702. |
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