首页|Tailoring raloxifene into single-component molecular crystals possessing multilevel stimuli-responsive room-temperature phosphorescence

Tailoring raloxifene into single-component molecular crystals possessing multilevel stimuli-responsive room-temperature phosphorescence

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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.

Crystal engineeringMolecular packingOrganic room-temperature phosphorescence(RTP)PolymorphStimuli-responsiveness

Zhichao Pan、Jinming Song、Shasha Zhang、Ping Zeng、Ju Mei、Da-Hui Qu

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Key Laboratory for Advanced Materials,Joint International Research Laboratory of Precision Chemistry and Molecular Engineering,Feringa Nobel Prize Scientist Joint Research Center,Frontiers Science Center for Materiobiology and Dynamic Chemistry,Institute of Fine Chemicals,School of Chemistry & Molecular Engineering,East China University of Science &Technology,Shanghai 200237,China

国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金Shanghai Science and Technology Commission Basic Project Shanghai Natural Science FoundationShanghai Municipal Science and Technology Major ProjectProgramme of Introducing Talents of Discipline to Universities上海市科委项目上海市科委项目中央高校基本科研业务费专项

21788102222750552202550322220102004218750642179036121ZR14176002018SHZDZX03B160171752075010021JC1401700

2024

10.1016/j.scib.2024.02.029

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(9)
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