Recoverable and Sensitive Pressure-Induced Mechanochromic Photoluminescence of a Au-P Complex
Ningwen Yang1, Yijia Chang1, Jiangyue Wang1
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
Abstract:
A binuclear Au-P complex [Au2(2-bdppmapy)2](PF6)2 (1) was synthesised by the reaction of 2-bdppmapy (N,N'-bis-(diphenylphosphanylmethyl-2-aminopyridine) with AuCN and [Cu(MeCN)4]PF6. The solid phase of 1 emitted bright yellow phosphorescence at λmax = 580 nm under UV excitation (QY = 4.41%, τ = 1.88 μs), which shifted to green (λmax = 551 nm, QY = 5.73%) after being pressurised under 5 MPa. This colour change was recoverable upon exposure to CH2Cl2 vapor. Similar mechanochromic photoluminescence behaviour was observed after grinding the crystals of 1. A filter paper impregnated with 1 demonstrated recyclable write/erase functionality for encrypted information transfer.
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