Strong Photomechanical Effects in Photochromic Organic Microcrystals

I. Colombier Laboratoire de Spectrométrie Physique–CNRS, UJF, St Martin d'Hères, France

S. Spagnoli Laboratoire de Spectrométrie Physique–CNRS, UJF, St Martin d'Hères, France

A. Corval Laboratoire de Spectrométrie Physique–CNRS, UJF, St Martin d'Hères, France

P. L. Baldeck Laboratoire de Spectrométrie Physique–CNRS, UJF, St Martin d'Hères, FranceCorrespondence[email protected]

M. Giraud Laboratoire de Chimie Inorganique, Université Paris-Sud, Orsay, France

A. Léaustic Laboratoire de Chimie Inorganique, Université Paris-Sud, Orsay, France

P. Yu Laboratoire de Chimie Inorganique, Université Paris-Sud, Orsay, France

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ABSTRACT

Photomechanical effects are observed in single crystals of a thiazole-based diarylethene. Crystalline state photochromism has been characterized by absorption microspectroscopy. Clear single crystals turn colored under ultra-violet irradiation. When the energy absorbed by crystals reaches about ten microjoules, they jump. When we prevent crystals from jumping, parallel, equidistant cracks appear due to elastic energy dissipation. These phenomena are associated with a phototransformation ratio of only a few percent.

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Strong Photomechanical Effects in Photochromic Organic Microcrystals

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Strong Photomechanical Effects in Photochromic Organic Microcrystals

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