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

A new Ag/Cu bimetallic cluster [Ag<sub>10</sub>Cu<sub>6</sub>(bdppthi)<sub>2</sub>(C≡CPh)<sub>12</sub>(EtOH)<sub>2</sub>](ClO<sub>4</sub>)<sub>4</sub> (<b>1</b>, bdppthi = <i>N</i>,<i>N′...

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Bibliographic Details
Main Authors: Wei Yang, Shengnan Hu, Yuwei Wang, Sisi Yan, Xiang-Qian Cao, Hong-Xi Li, David James Young, Zhi-Gang Ren
Format: Article
Language:English
Published: MDPI AG 2023-01-01
Series:Molecules
Subjects:
Online Access:https://www.mdpi.com/1420-3049/28/3/1257
Description
Summary:A new Ag/Cu bimetallic cluster [Ag<sub>10</sub>Cu<sub>6</sub>(bdppthi)<sub>2</sub>(C≡CPh)<sub>12</sub>(EtOH)<sub>2</sub>](ClO<sub>4</sub>)<sub>4</sub> (<b>1</b>, bdppthi = <i>N</i>,<i>N′</i>-bis(diphenylphosphanylmethyl)-tetrahydroimidazole) exhibited strong phosphorescent (PL) emission at 644 nm upon excitation at 400 nm. Removal of the coordinated EtOH molecules in <b>1</b> resulted in derivative <b>1a</b>, which exhibited significant red-shifted emission at 678 nm. The structure and PL of <b>1</b> was restored on exposure to EtOH vapor. Cluster <b>1a</b> also exhibited a vapor-chromic PL response towards other common organic solvent vapors including acetone, MeOH and MeCN. A PMMA film of <b>1a</b> was developed as a reusable visible sensor for MeCN.
ISSN:1420-3049