A Novel Photoluminescent Ag/Cu Cluster Exhibits a Chromic Photoluminescence Response towards Volatile Organic Vapors

Wei Yang, Shengnan Hu, Yuwei Wang, Sisi Yan, Xiang Qian Cao, Hong Xi Li, David James Young, Zhi Gang Ren

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    Abstract

    A new Ag/Cu bimetallic cluster [Ag10Cu6(bdppthi)2(C≡CPh)12(EtOH)2](ClO4)4 (1, bdppthi = N,N'-bis(diphenylphosphanylmethyl)-tetrahydroimidazole) exhibited strong phosphorescent (PL) emission at 644 nm upon excitation at 400 nm. Removal of the coordinated EtOH molecules in 1 resulted in derivative 1a, which exhibited significant red-shifted emission at 678 nm. The structure and PL of 1 was restored on exposure to EtOH vapor. Cluster 1a also exhibited a vapor-chromic PL response towards other common organic solvent vapors including acetone, MeOH and MeCN. A PMMA film of 1a was developed as a reusable visible sensor for MeCN.

    Original languageEnglish
    Article number1257
    Pages (from-to)1-9
    Number of pages9
    JournalMolecules (Basel, Switzerland)
    Volume28
    Issue number3
    DOIs
    Publication statusPublished - Feb 2023

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