Reversible mechanochromism and enhanced AIE in tetraphenylethene substituted phenanthroimidazoles
Chemical Communications2014Vol. 50(65), pp. 9076–9076
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Abstract
Tetraphenylethene (TPE) substituted phenanthroimidazoles 3a and 3b were designed and synthesized by the Suzuki cross-coupling reaction. They show reversible mechanochromic behavior with contrast colors between sky-blue and yellow green. The powder XRD studies show that destruction of a crystalline state into an amorphous state is responsible for mechanochromism. Hydrogen bonding interaction of a cyano-group in 3b results in enhanced AIE and improved thermal stability.
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