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首页> 外文期刊>Synthetic Metals >Interfacial self-assembly of Zn(Fe)-bisterpyridine coordination polymers, their fluorescent and electrochemical properties in Langmuir-Blodgett films
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Interfacial self-assembly of Zn(Fe)-bisterpyridine coordination polymers, their fluorescent and electrochemical properties in Langmuir-Blodgett films

机译：Zn（Fe）-二吡啶吡啶配位聚合物的界面自组装及其在Langmuir-Blodgett膜中的荧光和电化学性质

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摘要

Metal-bisterpyridine coordination polymers (CPs) have been synthesized at the air-water interface through an interfacial coordination reaction of metal ions (Zn~(2+)/Fe~(2+)) with bidentate ligand of 4,4""-(l,4-phenylene)bis(2,2':6'2"-terpyridine) (PBTerpy). Surface pressure-area isotherms indicated that the average molecular area of PBTerpy was about 0.8 nm~2 on the pure water surface, which slightly increased to about 1 nm~2 on the inorganic salt subphase surfaces due to the formation of Zn(Fe)-PBTerpy CPs. Monolayers of the Zn(Fe)-PBTerpy CPs were deposited on the quartz, Si and indium tin oxide (ITO) substrate surfaces by the Langmuir-Blodgett (LB) method. The as-prepared LB films were characterized by using UV-vis absorption and fluorescence spectroscopy, X-ray photoelectron spectroscopy, as well as by using scanning electron microscope and atomic force microscope. The pure PBTerpy ligand and its LB films showed a broad fluorescent emission at about 350-370 nm. This emission red shifted to about 380-410nm in the LB films of Zn(Fe)-PBTerpy CPs.Time-resolved fluorescent spectra revealed that the emission lifetime was about 1.2-2.4 ns for the pure PBTerpy ligand in the dilute methanol solution and its LB films, while it was about 5.0 ns in the LB film of Fe-PBTerpy CPs and 20.6 ns in the LB film of Zn-PBTerpy CPs. A couple of reversible redox wave was recorded and centered at about -0.53 V (vs Ag/AgCl) for the ITO electrode covered by the LB film of Fe-PBTerpy CPs, which was designated to one electron transfer process between the CPs of Fe~(II)-PBTerpy and Fe~(III)-PBTerpy. Since the PBTerpy can coordinate with lots of transition metal ions, we suggest that the present method may be used to prepare new optically and electrically active organic-inorganic composite materials.
机译：通过金属离子（Zn〜（2 +）/ Fe〜（2+））与4,4“”-双齿配体的界面配位反应，在空气-水界面合成了金属-吡啶吡啶配位聚合物（CPs） （1,4-亚苯基）双（2,2'：6'2“-吡啶（PBTerpy）。表面压力-等温线等温线表明，纯水表面PBTerpy的平均分子面积约为0.8 nm〜2，由于形成了Zn（Fe）-PBTerpy CPs，在无机盐子相表面上微增至约1 nm〜2。Zn（Fe）-PBTerpy CPs的单层沉积在石英，Si和铟锡氧化物（ ITO）衬底表面采用Langmuir-Blodgett（LB）方法，通过紫外可见吸收和荧光光谱，X射线光电子能谱以及扫描电子显微镜和原子力显微镜对制备的LB膜进行表征纯的PBTerpy配体及其LB膜在约350-370 nm处显示宽荧光发射。在Zn（Fe）-PBTerpy CPs的LB膜中升至约380-410nm。时间分辨荧光光谱表明，纯PBTerpy配体在稀甲醇溶液及其LB膜中的发射寿命约为1.2-2.4 ns， Fe-PBTerpy CPs的LB膜约为5.0 ns，而Zn-PBTerpy CPs的LB膜约为20.6 ns。对于被Fe-PBTerpy CPs的LB膜覆盖的ITO电极，记录了一对可逆的氧化还原波，并集中在约-0.53 V（vs Ag / AgCl），这被指定为Fe〜CP的CP之间的一个电子转移过程。 （II）-PBTerpy和Fe〜（III）-PBTerpy。由于PBTerpy可以与许多过渡金属离子配位，因此我们建议本方法可用于制备新型的光学和电活性有机无机复合材料。

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