Abstract
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.
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