Issue 34, 2021

A photoluminescent organosuperelastic crystal of 7-amino-4-methylcoumarin

Abstract

A unique mechanical property of superelasticity is observed not only in so-called shape-memory alloys but also in molecular crystals. In contrast, superelasticity can coexist with various attractive functions derived from molecules in the latter. Herein we demonstrate a photoluminescent organosuperelastic crystal of a pure organic compound: 7-amino-4-methylcoumarin. UV light irradiation causes a negligible effect on a stress–strain curve with a typical superelastic hysteresis loop in the crystal. The emission color of yellow-green is visually unchanged during the superelastic deformation because of the twinning nature. Superelasticity coexisting with photoluminescence properties is unprecedented in the conventional SMAs and indicates promising practical applications of molecular crystals as the next generation superelastic materials.

Graphical abstract: A photoluminescent organosuperelastic crystal of 7-amino-4-methylcoumarin

Supplementary files

Article information

Article type
Paper
Submitted
17 Mar 2021
Accepted
04 Apr 2021
First published
06 Apr 2021

CrystEngComm, 2021,23, 5801-5804

A photoluminescent organosuperelastic crystal of 7-amino-4-methylcoumarin

T. Sasaki, S. Ranjan and S. Takamizawa, CrystEngComm, 2021, 23, 5801 DOI: 10.1039/D1CE00359C

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