Krishna, Gamidi Rama; Mangalampalli, S.R.N. Kiran; Fraser, Cassandra L; Ramamurty, U; Reddy, C Malla
In solid-state mechanochromic luminescence (ML) materials, it remains a challenge to establish the origin of fluorescence color changes upon mechanical action and to determine why only some fluorophores exhibit ML behavior. The study of mechanical properties by nanoindentation, followed by ML experiments on green- and cyan-emitting polymorphs of difluoroboron avobenzone reveals that upon smearing, the plastically deformable cyan form shows a prominent color change to yellow, while in the harder...[Show more]
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