Mechano-Responsive Luminescence via Crystal-to-Crystal Phase Transitions Between Chiral and Non-chiral Space Groups

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A novel mechano-responsive luminescent (MRL) material based on crystal-to-crystal phase transitions between crystals of a chiral and those of a centrosymmetric space group, accompanied by a change of emission properties, is described. Initially, a gold complex containing a biphenyl moiety, which exhibits an achiral structure in solution, afforded an orange-emitting amorphous phase together with a viscous isotropic oil after evaporation of the solvent. Upon pricking, the orange-emitting oil spontaneously crystallized either in a centrosymmetric or in a chiral space group while simultaneously changing the emission properties. Remarkably, grinding the chiral crystals induced a solid-state phase transition to the achiral crystals under concomitant changes of the emission properties.


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© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Graduate School of Chemical Science and EngineeringHokkaido UniversitySapporoJapan

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