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光に応答するミクロ孔を利用した異方的能動輸送膜の開発

利用响应光的微孔开发各向异性主动传输膜

基本信息

批准号：
15J10616
负责人：
黄虎彪
金额：
$ 1.79万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for JSPS Fellows
财政年份：
2015
资助国家：
日本
起止时间：
2015-04-24 至 2018-03-31
项目状态：
已结题

项目摘要

This research project in this year is originated from a serendipitous discovery. A topological defect-directed nucleation and growth of a porphyrin-based core-shell-like microstructure (PorMOF) is discovered with the aid of in situ optical microscopic observations. The key points are summarized as follows:1.A unique crystallization pathway of a porphyrin-based crystalline microstructure with a core-shell morphology is discovered in one-pot synthesis of zinc nitrate hexahydrate, 4,4’-azopyridine (AzoPy) and 4,4’,4’’,4’’’-(porphine-5,10,15,20-tetrayl)tetrakis(benzoic acid) (2HPor) in DMF / EtOH (v / v = 3:1) in a quartz cell (1 mm × 10 mm) at 64°C.2.The morphologies and structures of this crystalline microstructure are characterized by scanning electron microscopy, transmission electron microscopy and atomic force microscopy and X-ray diffraction analysis.3.The mechanism of this crystalline microstructure formation is established based on in situ optical microscopic observations that a topological defects pinned at the center of shell crystals directs and triggers the nucleation and growth of a new crystalline phase because of a lower energy barrier.4.Such a crystalline microstructure exhibits unique photophysical properties that the shell part imposes a remarkable impact on the fluorescence emission of the corresponding core part that locates in the center of the shell. More specifically, the shell can quench the fluorescence of the core; and if the core crystal is released from the shell part, anisotropic fluorescence emission is observed.

今年的这个研究项目源于一个偶然的发现。借助原位光学显微镜观察，发现了卟啉基核壳结构（PorMOF）的拓扑缺陷导向成核和生长。主要内容如下：1.在一锅法合成硝酸锌、4，4 '-偶氮吡啶（AzoPy）和4，4'，4 ''，4 '''-卟啉（Py）的过程中，发现了一种独特的卟啉基核壳结构的结晶途径。（卟啉-5，10，15，20-四基）四（苯甲酸）（2 HP或）的DMF / EtOH溶液（v / v = 3：1）在石英池中（1 mm × 10 mm）。2.用扫描电子显微镜（SEM）表征了该晶体显微结构的形貌和结构，透射电子显微镜、原子力显微镜和X-射线衍射分析. 3.通过原位光学显微镜观察，建立了这种晶体结构形成的机理这种晶体微结构具有独特的物理化学性质，即壳层部分对位于壳层中心的相应核层部分的荧光发射有显著的影响.更具体地，壳可以猝灭核的荧光;并且如果核晶体从壳部分释放，则观察到各向异性荧光发射。