A novel photo- and hydrochromic europium metal–organic framework with good anion sensing properties,Journal of Materials Chemistry C

当前位置： X-MOL 学术 › J. Mater. Chem. C › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A novel photo- and hydrochromic europium metal–organic framework with good anion sensing properties
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2017-08-08 00:00:00 , DOI: 10.1039/c7tc03013d
Chenghui Zhang _{1,

2,

3,

4} , Libo Sun _{1,

2,

3,

4} , Yan Yan _{1,

2,

3,

4} , Huaizhong Shi _{1,

2,

3,

4} , Bolun Wang _{1,

2,

3,

4} , Zhiqiang Liang _{1,

2,

3,

4} , Jiyang Li _{1,

2,

3,

4}

Affiliation

Crystalline chromic materials coupled with other functionalities are of particular interest due to their multiple external stimuli responsive properties. In this work, a new photochromic and hydrochromic metal–organic framework based on a bipyridinium carboxylate cationic 1-(3,5-dicarboxyphenyl)-4,4′-bipyridinium bromide (H₂ipbpBr) ligand and a luminescent Eu³⁺ ion has been successfully designed and synthesized. [Eu(ipbp)₂(H₂O)₃]·Br·6H₂O (1) is photo-active under both UV and visible light irradiation accompanied by an obvious color change from light yellow to green owing to the formation of ipbp radicals under light stimulus. Meanwhile, compound 1 exhibits unique hydrochromic properties, and the reversible color change between light yellow and dark green caused by electron transfer can be induced by release/reabsorption of guest water molecules accompanied by a structure transformation. Moreover, the luminescence properties and two-dimensional layered cationic network of 1 endow it with excellent sensing ability for Cr₂O₇²⁻ and CrO₄²⁻ anions. This work will provide a new perspective to design smart MOF materials that can serve as practical multi-responsive sensors to light, water, and chemicals.

中文翻译：

具有良好阴离子感测特性的新型光致变色hydro金属有机框架

结晶铬材料与其他功能性结合，由于它们具有多种外部刺激响应特性，因此特别受关注。在这项工作中，基于联吡啶鎓羧酸盐阳离子1-（3,5-二羧苯基）-4,4'-联吡啶鎓溴化物（H ₂ ipbpBr）配体和发光Eu ³⁺离子的新的光致变色和水致变色金属有机框架具有已成功设计和合成。[Eu（ipbp）₂（H ₂ O）₃ ]·Br·6H ₂ O（1）在紫外光和可见光照射下均具有光活性，并且由于形成了ipbp而颜色由浅黄色变为绿色。轻刺激下的自由基。同时，复合图1显示出独特的水致变色性质，并且通过电子转移引起的客体水分子的释放/再吸收以及结构转变可以引起由电子转移引起的浅黄色和深绿色之间的可逆颜色变化。另外，发光特性和二维层状阳离子网络1赋予其与对Cr优良感测能力₂ ö ₇^2-和的CrO ₄^2-阴离子。这项工作将为设计智能MOF材料提供新的视角，这些材料可以用作对光，水和化学物质的实用多响应传感器。

更新日期：2017-09-14

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11