Recoverable and Sensitive Pressure-Induced Mechanochromic Photoluminescence of a Au-P Complex

Recoverable and Sensitive Pressure-Induced Mechanochromic Photoluminescence of a Au-P Complex

A binuclear Au-P complex [Au<sub>2</sub>(2-bdppmapy)<sub>2</sub>](PF<sub>6</sub>)<sub>2</sub> (<b>1</b>) was synthesised by the reaction of 2-bdppmapy (N,N′-bis-(diphenylphosphanylmethyl-2-aminopyridine) with AuCN and [Cu(MeCN)<sub>4&...

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Bibliographic Details
Main Authors: Ningwen Yang, Yijia Chang, Jiangyue Wang, David James Young, Hong-Xi Li, Yuxin Lu, Zhi-Gang Ren
Format: Article
Language:English
Published: MDPI AG 2025-04-01
Series:Molecules
Subjects:
Ag-P complex
stimuli-responsive material
mechanochromic photoluminescence
photoluminescent material
Online Access:https://www.mdpi.com/1420-3049/30/9/2011
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Summary:A binuclear Au-P complex [Au<sub>2</sub>(2-bdppmapy)<sub>2</sub>](PF<sub>6</sub>)<sub>2</sub> (<b>1</b>) was synthesised by the reaction of 2-bdppmapy (N,N′-bis-(diphenylphosphanylmethyl-2-aminopyridine) with AuCN and [Cu(MeCN)<sub>4</sub>]PF<sub>6</sub>. The solid phase of <b>1</b> emitted bright yellow phosphorescence at <i>λ</i><sub>max</sub> = 580 nm under UV excitation (QY = 4.41%, τ = 1.88 μs), which shifted to green (<i>λ</i><sub>max</sub> = 551 nm, QY = 5.73%) after being pressurised under 5 MPa. This colour change was recoverable upon exposure to CH<sub>2</sub>Cl<sub>2</sub> vapor. Similar mechanochromic photoluminescence behaviour was observed after grinding the crystals of <b>1</b>. A filter paper impregnated with <b>1</b> demonstrated recyclable write/erase functionality for encrypted information transfer.
ISSN:1420-3049

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