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      Polymorphism and reversible mechanochromic luminescence for solid-state difluoroboron avobenzone.

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          Abstract

          Difluoroboron avobenzone (BF(2)AVB), a simple boron complex of a commercial sunscreen product, exhibits morphology-dependent emission and mechanochromic luminescence in the solid state. When scratched, smeared, or even gently touched, the emission color of BF(2)AVB films is significantly red-shifted under UV excitation. In the rubbed regions, the fluorescence recovers slowly at room temperature or much faster with heating, resulting in a simple rewritable "scratch the surface" ink of potential commercial use.

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          Author and article information

          Journal
          J. Am. Chem. Soc.
          Journal of the American Chemical Society
          1520-5126
          0002-7863
          Feb 24 2010
          : 132
          : 7
          Affiliations
          [1 ] Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, USA.
          Article
          10.1021/ja9097719
          20108897

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