Light enhanced proton conductivity in a terbium phosphonate photochromic chain complex  

作　　者：Qian Zhang Wu-Ji Wei Qi Li Jie Pan Song-De Han Ji-Xiang Hu Guo-Ming Wang 

机构地区：[1]College of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,China

出　　处：《Science China Chemistry》2021年第7期1170-1176,共7页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(21901133,22071125,22071126,21571111);Key Research and Development Project of Shandong Province(2019GGX102006)。

摘　　要：Crystalline complexes that exhibited light switchable proton conductivity are of great interest but still a challenge in material science.Herein,a terbium phosphonate chain complex was synthesized through assembly of electron-rich phosphonate units,electron-deficient polypyridine components and paramagnetic Tb^(3+)ions.Via light irradiation and heat treatment,the photogenerated radicals could simultaneously and reversibly tune the photochromic,luminescent and magnetic properties.Originating from the abundant hydrogen bonding networks formed between PO_3 groups and lattice water molecules,proton conductive behaviour was explored with high proton conductivity of(1.74±0.19)×10^(-3)S cm^(-1)at 80°C and 100%relative humidity.Importantly,accompanied with the colorless sample changed to blue,the proton conductivity increased about 20%after room temperature light illumination,implying that light irradiation could act as an external stimulus to enhance the conductive properties of original material.This work innovatively realized the light responsive conductive property in the electron transfer photochromic materials,providing a novel strategy for the construction of smart materials.

关 键 词：electron transfer H-bonding interactions light responsive proton conductivity PHOTOCHROMISM PHOTOMAGNETISM 

分 类 号：O641.4[理学—物理化学] TB34[理学—化学]