Issue 12, 2023

Control of intramolecular singlet fission in a pentacene dimer by hydrostatic pressure

Abstract

Singlet fission (SF), which produces two triplet excitons from a singlet exciton, has been identified as a novel nanointerface for efficient (photo)energy conversion. This study aims to control exciton formation in a pentacene dimer through intramolecular SF using hydrostatic pressure as an external stimulus. We reveal the hydrostatic-pressure-induced formation and dissociation processes of correlated triplet pairs (TT) in SF by means of pressure-dependent UV/vis and fluorescence spectrometry and fluorescence lifetime and nanosecond transient absorption measurements. The photophysical properties obtained under hydrostatic pressure suggested distinct acceleration of the SF dynamics by microenvironmental desolvation, the volumetric compaction of the TT intermediate based on solvent reorientation toward an individual triplet (T1), and pressure-induced shortening of T1 lifetimes. This study provides a new perspective on the control of SF by hydrostatic pressure as an attractive alternative to the conventional control strategy for SF-based materials.

Graphical abstract: Control of intramolecular singlet fission in a pentacene dimer by hydrostatic pressure

Supplementary files

Article information

Article type
Edge Article
Submitted
18 yan 2023
Accepted
23 fev 2023
First published
23 fev 2023
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2023,14, 3293-3301

Control of intramolecular singlet fission in a pentacene dimer by hydrostatic pressure

T. Kinoshita, S. Nakamura, M. Harada, T. Hasobe and G. Fukuhara, Chem. Sci., 2023, 14, 3293 DOI: 10.1039/D3SC00312D

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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