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New emissive mononuclear copper (I) complex: Structural and photophysical characterization focusing on solvatochromism, rigidochromism and oxygen sensing in mesoporous solid matrix

2018; Elsevier BV; Volume: 159; Linguagem: Inglês

10.1016/j.dyepig.2018.07.020

1873-3743

Leandro P. Ravaro, Ana Carolina Mafud, Zhi Li, Eric W. Reinheimer, Carlos A. de Simone, Yvonne Primerano Mascarenhas, Peter C. Ford, Andréa Simone Stucchi de Camargo,

Metal complexes synthesis and properties

We report the structural and photophysical property analyses of a new emissive copper (I) complex CuI(PPh3) (L) (1, L = 4,4′-dimethoxy-2,2′-bipyridine) which demonstrates solvatochromism. When recrystallized from acetonitrile, the originally orange color of 1 becomes yellow and demonstrates a blue-shifted, broad emission spectrum. This process is reversed when the yellow solid is redissolved in dichloromethane and recrystallized. The lattice parameters and angles found were a = 17.769 Å, β = 114.05° and a = 11.555 Å, angle β = 92.70° for the orange and yellow forms of 1, respectively, and there are notable structure differences for CuI(PPh3) (L) in these two solids. When loaded into a mesoporous silica, the emission blue shift becomes greater, indicating a strong rigidochromic effect at room temperature. The emission from such copper complex loaded mesoporous silica matrix is quenched by oxygen and this quenching has been quantified.