A multi-stimuli-responsive CsPbBr3@PL-MOF functional anti-counterfeiting material. (9th December 2022)

• Record Type: Journal Article
• Authors: Li, Yanli; Li, Huijun; Xu, Zhouqing
• Is Part Of: New journal of chemistry. Volume 47:Number 2(2023)
• Page Start: 947
• Page End: 951
• Publication Date: 2022-12-09
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj05102h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A new composite material CsPbBr3 @HPU-22 was prepared, which showed multi-stimulus-responsive luminescence tuning behavior upon H2 O and HCl/Et3 N stimulation. Abstract : A new composite material CsPbBr3 @HPU-22 was prepared by using {[Zn2 (ADDA)2 (DMF)(H2 O)2 ]·(DMF)} n (HPU-22 ) as a carrier to encapsulate CsPbBr3 in channels. The obtained composite material has high sensitivity to water. Under the stimulation of a humid environment or water vapor, the color of the CsPbBr3 @HPU-22 product can be seen to turn from yellow to white. In addition, it is necessary to note that the changed color could recover after drying. A study of the mechanism demonstrated that the inter-conversion between CsPbBr3 and CsPb2 Br5 is the major reason for this reversible color change during the wetting and drying process. In addition, CsPbBr3 @HPU-22 also exhibited high sensitivity to acid–base gases, accompanied by a change in fluorescence color under UV light. The evidence showed that the protonation of DMF molecules might result in the reversible response of CsPbBr3 @HPU-22 to acid–base gases. Therefore, the multi-response to water and acid–base gas stimulation gives the CsPbBr3 @HPU-22 applications in the field of high-level anti-counterfeiting.