Issue 6, 2022

Luminescent polymorphic crystals: mechanoresponsive and multicolor-emissive properties

Abstract

Mechanoresponsive luminescent organic crystals have recently attracted increasing interest owing to their potential applications in advanced optoelectronic devices, mechanosensors, security technologies, etc. In the past few years, an increasing number of polymorphic organic crystals have emerged to elucidate the relationship between the crystal structure and mechanoresponsive properties of luminescent organic crystals. This highlight article will introduce the recent progress in luminescent organic polymorphs with mechanoresponsive properties. Multicolor emission and multistimuli-responsive switching of fluorescence have been achieved for various polymorphic organic crystals that exhibit mechanochromic luminescence (MCL). Remarkable studies have also been carried out for the development of polymorphic MCL crystals showing different thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP) properties depending on their crystal structures. In addition to the formation of polymorphs, the crystallization of pseudopolymorphs and cocrystals is also effective in controlling the luminescence and MCL properties of organic luminescent compounds. Moreover, polymorphic crystals that exhibit other mechanoresponsive behaviors, such as mechanoluminescence (ML), have been highlighted. Based on the deep insights into the luminescence properties and mechanoresponsive behaviors of polymorphic crystals, further research is expected to establish rational guidelines for the prediction and creation of organic crystals with desired photophysical and mechanical properties.

Graphical abstract: Luminescent polymorphic crystals: mechanoresponsive and multicolor-emissive properties

Article information

Article type
Highlight
Submitted
04 dec 2021
Accepted
03 jan 2022
First published
03 jan 2022

CrystEngComm, 2022,24, 1112-1126

Author version available

Luminescent polymorphic crystals: mechanoresponsive and multicolor-emissive properties

S. Ito, CrystEngComm, 2022, 24, 1112 DOI: 10.1039/D1CE01614H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements