AAO辅助三唑亚铁纳米材料:一维限制生长和二维表面成膜及自旋转换性能（英文）  

AAO Assisted 1D Confined Assembly and 2D Surface Filming of Iron(Ⅱ) Triazole Nanomaterial and Spin-Crossover Properties

作　　者：李志华 王玉侠 邱丹 李在均 顾志国 

机构地区：[1]江南大学化学与材料工程学院,无锡214122 [2]合成胶体与生物技术教育部重点实验室,无锡214122

出　　处：《无机化学学报》2017年第12期2311-2321,共11页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21771089);中央高校基本科研业务经费(No.JUSRP51725B,JUSRP51513)资助

摘　　要：通过连续多步自组装的方式分别将三唑亚铁(SCO1)和氨基三唑亚铁(SCO2)自旋转换纳米材料生长于氧化铝模板(AAO)的孔道内和表面上。利用扫描电镜(SEM)、红外光谱(IR)、粉末X射线衍射(PXRD)、拉曼光谱(Raman)等手段对SCO1-1D+2D和SCO2-1D+2D纳米材料进行表征,SEM表明随着自组装时间的增加,球状的SCO纳米颗粒生长于AAO孔道内,并逐渐形成1D的纳米结构,而在AAO表面则形成致密均匀的SCO-2D薄膜。两种SCO-1D+2D纳米粒子都具有两步自旋行为(SCO1-1D+2D:T_(c1)↑=319 K,T_(c1)↓=313 K,T_(c2)↑=381 K,T_(c2)↓=340 K;SCO2-1D+2D:T_(c1)↑=181 K,T_(c1)↓=155 K,T_(c2)↑=246 K,T_(c2)↓=233 K)。对相应的SCO-1D和SCO-2D磁性结果表明,两步自旋转换行为的产生是由于SCO组装体形貌的差异。其中,低温区的自旋转换行为是由生长于AAO表面的SCO-2D自旋转换性能所致,而发生在更高温度的第二阶段的自旋转换行为则归因于生长于AAO孔道内的SCO-1D的自旋转换性能。Iron（Ⅱ） triazole （SCO1） and iron（Ⅱ） 4-amino-triazole （SCO2） spin-crossover （SCO） nanomaterials were assembled in the channel and on the surface of anodic aluminum oxide （AAO） templates simultaneously by a facile sequential multistep assembly method. The obtained SCO1-1D＋2D and SCO2-1D＋2D nanomaterials have been characterized by SEM, FT-IR, PXRD, and Raman spectra. SEM images show that spherical SCO NPs growing in the channel of AAO templates aggregate with time going on, and assemble as 1D nanostructure. While those growing on the surface of AAO substrates assemble as uniform and dense 2D SCO film. It is interesting that both SCO-1D＋2D nanostructures present a special two-step spin-crossover behaviour with hysteresis loops （SCO1-1D＋2D：Tc1↑=319 K, Tc1↓=313 K, Tc2↑=381 K, Tc2↓=340 K; SCO2-1D＋2D：Tc1↑=181 K, Tc1↓=155 K, Tc2↑=246 K, Tc2↓=233 K）. The magnetic measuring of SCO-1D and SCO-2D indicates that the two-step SCO behaviour results from the different assembly morphologies of SCO. The first step spin transition at lower temperature is ascribed to the properties of 2D SCO films growing on the surface of AAO templates, while the transition in the second step at higher temperature can be attributed to the 1D SCO confined assembly growing in the channel of AAO membranes.

关 键 词：纳米材料 氧化铝模板 自组装 两步自旋转换 

分 类 号：TB33[一般工业技术—材料科学与工程]