Abstract
Simultaneously achieving room-temperature phosphorescence(RTP)and multiple-stimuli responsive-ness in a single-component system is of significance but remains challenging.Crystallization has been recognized to be a workable strategy to fulfill the above task.However,how the molecular packing mode affects the intersystem crossing and RTP lifetime concurrently remains unclear so far.Herein,four eco-nomic small-molecular compounds,analogues of the famous drug raloxifene(RALO),are facilely synthe-sized and further explored as neat single-component and stimuli-responsive RTP emitters via crystallization engineering.Thanks to their simple structures and high ease to crystallize,these raloxifene analogues function as models to clarify the important role of molecular packing in the RTP and stimuli-responsiveness properties.Thorough combination of the single-crystal structure analysis and theoretical calculations clearly manifests that the tight antiparallel molecular packing mode is the key point to their RTP behaviors.Interestingly,harnessing the controllable and reversible phase transitions of the two poly-morphs of RALO-OAc driven by mechanical force,solvent vapor,and heat,a single-component multilevel stimuli-responsive platform with tunable emission color is established and further exploited for optical information encryption.This work would shed light on the rational design of multi-stimuli responsive RTP systems based on single-component organics.
基金项目
国家自然科学基金(21788102)
国家自然科学基金(22275055)
国家自然科学基金(22025503)
国家自然科学基金(22220102004)
国家自然科学基金(21875064)
国家自然科学基金(21790361)
Shanghai Science and Technology Commission Basic Project Shanghai Natural Science Foundation(21ZR1417600)
Shanghai Municipal Science and Technology Major Project(2018SHZDZX03)
Programme of Introducing Talents of Discipline to Universities(B16017)
上海市科委项目(17520750100)
上海市科委项目(21JC1401700)
中央高校基本科研业务费专项()
NETL
NSTL
万方数据