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以超临界二氧化碳为溶媒,将偶氧苯分子插入到α 以及β 环糊精的分子环空洞中合成 出了偶氧苯-环糊精纳米复合体。环糊精与偶氧苯的摩尔分子为1∶1的混合物,放入压力 30MPa、温度120℃的超临界装置中处理后,对其生成物采用红外、固体核磁共振、X 射线衍 射、差热分析及化学元素分析等手段进行了分析,结果表明偶氧苯成功地插入到β 环糊精分子 环空洞中形成了纳米复合体,而α 环式糊精与偶氮苯之间只是简单的物理混合物,没有形成纳 米复合体。所得到的偶氮苯 β 环式糊精复合体具有通道式分子结构:二个β 环式糊精分子捕 获一个偶氧苯分子,β 环式糊精的分子环空洞连成一个通道。偶氧苯插入到β 环式糊粉分子 环空洞中后其热稳定性也得到大幅度提高。
With the supercritical carbon dioxide as the solvent, the peroxy-benzene molecules were inserted into the molecular annuli of α and β-cyclodextrin to synthesize the peroxy-benzene-cyclodextrin nanocomposites. 1: 1 mixture of cyclodextrin and diphenoxybenzene was placed in a supercritical unit at a pressure of 30 MPa and a temperature of 120 ° C. The resultant product was subjected to infrared, solid-state nuclear magnetic resonance, X-ray diffraction, differential thermal Analysis and chemical elemental analysis. The results show that perylene oxide is successfully inserted into the annulus of β-cyclodextrin to form a nanocomposite, while α-cyclodextrin and azobenzene are only simple physical The mixture did not form nanocomposites. The obtained azobenzene β-cyclodextrin complex has a channel-like molecular structure: two beta-cyclodextrin molecules capture one peroxy benzene molecule, and the beta-cyclodextrin molecular ring holes form a channel. The thermal stability of azoxybenzene after it is inserted into the ring of β-cyclodextrin molecules has also been greatly improved.