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Review
. 2020 Jun 15;59(25):9841-9855.
doi: 10.1002/anie.201916666. Epub 2020 Apr 1.

Recent Progress in the Development of Solid-State Luminescent o-Carboranes with Stimuli Responsivity

Junki Ochi  1 , Kazuo Tanaka  1 , Yoshiki Chujo  1
Affiliations
Free article
Review

Recent Progress in the Development of Solid-State Luminescent o-Carboranes with Stimuli Responsivity

Junki Ochi et al. Angew Chem Int Ed Engl. .
Free article

Abstract

o-Carborane, a cluster compound containing boron and adjacent carbon atoms, displays intriguing luminescent properties. Recently, compounds containing o-carborane units were found to show suppressed aggregation-induced quenching and intense solid-state emission; they also show potential for the development of stimuli-responsive luminochromic materials. In this Minireview, we introduce three kinds of fundamental photochemical properties: aggregation-induced emission, twisted intramolecular charge transfer in crystals, and environment-sensitive excimer formation in solids. Based on these properties, several types of luminochromism, such as thermos-, vapo-, and mechanochromism, have been discovered. Based mainly on results from recent studies, we illustrate these mechanisms as well as unique luminescent behaviors of o-carborane derivatives.

Keywords: carboranes; chromism; emission; luminescence; stimuli responsivity.

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