Switchable near-infrared photoluminescence of PbS quantum dots through light and heat modulated hole transfer to spiropyran molecules
作者机构：Henan Institute of Advanced TechnologyZhengzhou UniversityZhengzhou 450052China College of ChemistryZhengzhou UniversityZhengzhou 450052China State Key Laboratory of Molecular Reaction Dynamics and Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of SciencesBeijing 100049China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2024年第17卷第12期
页 面：10483-10489页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学]
基 金：support from the National Natural Science Foundation of China(Nos.21803070,22103072,and 22173098) the Fundamental Research Funds for the Central Universities(No.20720220009)
主 题：photoswitch near-infrared(NIR)photoluminescence quantum dots spiropyran hole transfer
摘 要：Precise modulation of photoluminescence(PL)of nanomaterials by external control is of great interest in such diverse areas as photocatalysis,memory and *** studies have combined colloidal quantum dots(QDs)with photochromic molecules to construct optically switchable PL ***,it still remains challenging to switch the PL on and off in the near-infrared(NIR)region with multi-stimuli such as light and ***,we present light and heat triggered modulation of the NIR PL of PbS QDs using adjacent spiropyran *** NIR PL of PbS was reversibly switched on and off through the isomerization process of spiropyran molecules that can be triggered by either light irradiation or *** PL intensity of the off state is low enough to yield an on/off ratio as high as *** absorption measurements revealed ultrafast photoinduced hole transfer from PbS to spiropyran,the rate and efficiency of which depend critically on the driving force that can be deeply modulated through spiropyran *** study not only establishes a novel multi-stimuli switchable PL system in the NIR,but also provides fundamental guidelines for the design for such systems for a variety of emerging applications.
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