Abstract
Chiroptical switches based on circularly polarized luminescence(CPL)have shown the promising appli-cations in advanced information technologies.Herein,a pair of lanthanide coordination polymer enan-tiomers[Eu2(LR)3(BTFPO)2]n and[Eu2(Ls)3(BTFPO)2]n with light-regulated CPL property are designed,which are assembled by a chiral binuclear triple-stranded Eu3+helicates[Eu2(LR/s)3]coordinated with two photochromic triphenylphosphine oxides(BTFPO).Upon the alternative UV and 526 nm light irradia-tion,the complexes show the reversible photochromism,PL and CPL responses.Notably,the luminescence dissymmetry factor,glum of 5D0→7F1(591 nm)transition shows an obvious increase from 0.19 to 0.29 before and after 275 nm light irradiation.Additionally,the emission from Eu3+center is not completely quenched in closed-ring state due to the low photocyclization(ΦO-C)quantum yield of the polymer.The partial maintenance of emissive intensity is of essential importance for the monitor of CPL signal.More importantly,the CPL photo-switching property of the complexes in solid hybrid film is maintained,and still displays the enhanced CPL emission in photostationary state.Further,the potential applications of the doping film in logic gate and anti-counterfeiting were investigated.
基金项目
国家自然科学基金(52273263)
国家自然科学基金(52203219)
国家自然科学基金(51872077)
国家自然科学基金(52073080)
Science and Technology Plan of Inner Mongolia Autonomous Region(2020GG0164)
Scientific Research Project of Basic Scientific Research Operating Expenses of Colleges and Universities in Heilongjiang Provinc(2021-KYYWF-0029)
Scientific Research Project of Basic Scientific Research Operating Expenses of Colleges and Universities in Heilongjiang Provinc(2021-KYYWF-0041)
万方数据