Modulation of ΔEST and room temperature phosphorescence in carbazole derivatives

Komal Vasant Barhate; Amey P. Wadawale; K. R. S. Chandrakumar; Neeraj Agarwal

doi:10.1039/D3CC05119F

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Modulation of ΔE_ST and room temperature phosphorescence in carbazole derivatives†

Komal Vasant Barhate,^a Amey P. Wadawale,^b K. R. S. Chandrakumar

*^cd and Neeraj Agarwal

*^a

Author affiliations

* Corresponding authors

^a School of Chemical Sciences, UM DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina, Santacruz (E), Mumbai 400098, India
E-mail: na@cbs.ac.in

^b Chemistry Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India

^c Theoretical Chemistry Section, Bhabha Atomic Research Centre, Mumbai 400085, India
E-mail: krsc@barc.gov.in

^d Homi Bhabha National Institute, Anushakti Nagar, Mumbai - 400094, India

Abstract

A simple strategy to modulate the singlet–triplet energy gap in 3,6-diaryl-N-acetophenylcarbazole derivatives is developed. Different substituents significantly influenced ΔE_ST, which is correlated for the first time with the singlet–triplet state dipole moments. Phosphorescence at ambient conditions in powder form (τ is up to 248 μs) and ultra long lifetime (up to 2.2 s) at 77 K is observed.

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Article information

DOI: https://doi.org/10.1039/D3CC05119F
Article type: Communication
Submitted: 17 Oct 2023
Accepted: 02 Jan 2024
First published: 02 Jan 2024

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Chem. Commun., 2024,60, 1408-1411

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Modulation of ΔE_ST and room temperature phosphorescence in carbazole derivatives

K. V. Barhate, A. P. Wadawale, K. R. S. Chandrakumar and N. Agarwal, Chem. Commun., 2024, 60, 1408 DOI: 10.1039/D3CC05119F

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