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Vapochromic Gold(I)–Silver(I) Cluster Protected by Alkynyl and Phosphine Ligands
Author(s) -
Lei Zhen,
Chang ShanShan,
Wang QuanMing
Publication year - 2017
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201701012
Subject(s) - chemistry , luminescence , phosphine , methanol , diphenylphosphine , molecule , cluster (spacecraft) , metal , solvent , photochemistry , medicinal chemistry , inorganic chemistry , organic chemistry , catalysis , computer science , programming language , physics , optoelectronics
Intensely luminescent coinage metal cluster [Au 12 Ag 14 (C≡CPh) 20 (mdppz) 4 (CH 3 OH) 8 ](BF 4 ) 6 { 1 , mdppz = 2‐(3‐methylpyrazinyl)diphenylphosphine} was synthesized and structurally characterized. Twenty alkynyl ligands (PhC≡C – ), four mdppz ligands, and eight methanol molecules were found to co‐stabilize the metal cluster. Interestingly, when the weakly ligated methanol molecules were removed, the green luminescence of 1 significantly redshifted to yellow; exposing the resulting yellow sample in methanol vapor immediately restores the green luminescence. Thus reversible luminescence response can be observed by removing and restoring methanol. Other small solvent molecules with weak coordination ability such as Me 2 CO, MeCN, and C 2 H 5 OH were also found to be good agents to trigger the vapochromism.