Ultra-Narrowband Circularly Polarized Luminescence from Multiple 1,4-Azaborine-Embedded Helical Nanographenes

Zhang, F and Brancaccio, V and Saal, F and Deori, U and Radacki, K and Braunschweig, H and Rajamalli, P and Ravat, P (2024) Ultra-Narrowband Circularly Polarized Luminescence from Multiple 1,4-Azaborine-Embedded Helical Nanographenes. In: Journal of the American Chemical Society .

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Abstract

In this manuscript we present a strategy to achieve ultranarrowband circularly polarized luminescence (CPL) from multiple 1,4-azaborine-embedded helical nanographenes. The impact of number and position of boron and nitrogen atoms in the rigid core of the molecule on optical properties�including absorption and emission maxima, photoluminescence quantum yield, Stokes shift, excited singlet-triplet energy gap and full width at half-maximum (fwhm) for CPL and fluorescence�was investigated. The molecules reported here exhibits ultranarrowband fluorescence (fwhm 16-17.5 nm in toluene) and CPL (fwhm 18-19 nm in toluene). To the best of our knowledge, this is among the narrowest CPL for any organic molecule reported to date. Quantum chemical calculations, including computed CPL spectra involving vibronic contributions, provide valuable insights for future molecular design aimed at achieving narrowband CPL. © 2024 American Chemical Society.

Item Type:	Journal Article
Publication:	Journal of the American Chemical Society
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to the publishers.
Keywords:	Circular polarization; Full width at half maximum; Photoluminescence; Quantum yield; Toluene, Absorption maxima; Boron atom; Circularly polarized luminescence; Full widths at half maximums; Nanographenes; Nitrogen atom; Optical-; Property; Rigid core; Ultra-narrowband, Fluorescence
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	14 Nov 2024 21:11
Last Modified:	14 Nov 2024 21:12
URI:	http://eprints.iisc.ac.in/id/eprint/86864

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