One-Dimensional Heterobimetallic Au/Ag Coordination Polymer Showing a Selective, Reversible, and Visible Vapor-Chromic Photoluminescent Response toward Methanol

Mengyao Feng; Fuyuan Liu; Ningwen Yang; Jiayao Yu; Wei Yang; David James Young; Xiang-Qian Cao; Hong-Xi Li; Zhi-Gang Ren

doi:10.1021/acs.inorgchem.3c00429

One-Dimensional Heterobimetallic Au/Ag Coordination Polymer Showing a Selective, Reversible, and Visible Vapor-Chromic Photoluminescent Response toward Methanol

Inorg Chem. 2023 Apr 24;62(16):6439-6446. doi: 10.1021/acs.inorgchem.3c00429. Epub 2023 Apr 13.

Authors

Mengyao Feng¹, Fuyuan Liu¹, Ningwen Yang¹, Jiayao Yu¹, Wei Yang², David James Young³, Xiang-Qian Cao¹, Hong-Xi Li¹, Zhi-Gang Ren¹

Affiliations

¹ Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, Jiangsu, People's Republic of China.
² Faculty of Food Science and Technology, Suzhou Polytechnic Institute of Agriculture, Suzhou 215008, People's Republic of China.
³ Glasgow College UESTC, University of Electronic Science and Technology of China, Chengdu 611731, People's Republic of China.

PMID: 37053452
DOI: 10.1021/acs.inorgchem.3c00429

Abstract

A heterobimetallic coordination polymer [Au₄(dppmt)₄(AgCl)₂]_n (1) incorporating an in situ generated P-S ligand (dppmtH) was synthesized from the solvothermal reaction of Au(tht)Cl, AgCl, and dpppyatc in CH₃CN/CH₂Cl₂ (dppmtH = (diphenylphosphino)methanethiol, tht = tetrahydrothiophene, dpppyatc = N,N-bis((diphenylphosphaneyl)methyl)-N-(pyridin-2-yl)-amino-thiocarbamide). The structure of 1 contains a one-dimensional helical Au-Au chain in which the unique [Au₄Ag₂S₂] cluster units are connected by [Au₂(dppmt)₂] dimers. Upon excitation at 343 nm, 1 exhibited cyan (495 nm) phosphorescent emission at quantum yield (QY) = 22.3% and τ = 0.78 μs (λ_ex = 375 nm). Coordination polymer 1 exhibited a rapid, selective, reversible, and visible vapor-chromic response on exposure to methanol (MeOH) vapor with its emission shifting to a more intense green (530 nm, λ_ex = 388 nm) with QY = 46.8% and τ = 1.24 μs (λ_ex = 375 nm). A polymethylmethacrylate film containing 1 served as a reversible chemical sensor for the sensitive detection of MeOH in air.