Enhancing photoresponsiveness of metal-organic polyhedra by modifying microenvironment  

作　　者：Long Zheng Peng Tan Qian Song Sheng-Tao Wang Min Li Xiao-Qin Liu Lin-Bing Sun 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering,Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,China

出　　处：《Nano Research》2024年第6期5712-5717,共6页纳米研究（英文版）

基　　金：the National Key R&D Program of China(No.2022YFB3806800);the National Science Fund for Distinguished Young Scholars(No.22125804);the National Natural Science Foundation of China(No.22078155);the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions.

摘　　要：Photoresponsiveness of materials is critical to their tunability and efficiency in terminal applications.Photoresponsive metal-organic polyhedra(PMOPs)feature intrinsic pores and remote controllability,but aggregation of PMOPs in solid state hampers their photoresponsiveness seriously.Herein,we report the construction of a new PMOP(Cu_(24)(C_(16)H_(12)N_(2)O_(4))_(12)(C_(18)H_(22)O_(5))12,denoted as MOP-PR-LA),where long alkyl(LA)chains act as the intermolecular poles,propping against adjacent PMOP molecules to create individual microenvironment benefiting the isomerization of photoresponsive(PR)moieties.Upon ultraviolet(UV)-and visible-light irradiation,MOP-PR-LA is much easier to isomerize than the counterpart MOP-PR without LA.For propylene adsorption,MOP-PR has a low change of adsorption capacity(9.9%),while that of MOP-PR-LA reaches 58.6%.Density functional theory calculations revealed that PR in the cis state has a negative effect on adsorption,while the trans state of PR favors adsorption.This work might open an avenue for the construction of photoresponsive materials with high responsiveness and controllability.

关 键 词：photoresponsive adsorption metal-organic polyhedra AZOBENZENE long alkyl chains propylene capture 

分 类 号：O64[理学—物理化学]