Issue 7, 2023

On the role of torsional dynamics in the solid-state fluorescent properties of a new bifluorene–tetracarboxylic acid and its supramolecular assemblies: a structural and TD-DFT investigation

Abstract

A novel butterfly-shaped tetracarboxylic acid [9,9′-methylene-bis(9-methylfluorene-2,7-dicarboxylic acid), H4L] featuring a co-facial bifluorene core was designed and synthesised. Reactions of H4L with CdII produced the luminescent supramolecular frameworks 2 and 3, with different dimensionalities and wingspans of L4−. Their solid-state emission properties were rationalised based on the torsional dynamics of the facing bifluorene units by means of X-ray diffraction analysis and TD-DFT calculations.

Graphical abstract: On the role of torsional dynamics in the solid-state fluorescent properties of a new bifluorene–tetracarboxylic acid and its supramolecular assemblies: a structural and TD-DFT investigation

Supplementary files

Article information

Article type
Paper
Submitted
16 Nov 2022
Accepted
09 Jan 2023
First published
17 Jan 2023
This article is Open Access
Creative Commons BY license

CrystEngComm, 2023,25, 1058-1066

On the role of torsional dynamics in the solid-state fluorescent properties of a new bifluorene–tetracarboxylic acid and its supramolecular assemblies: a structural and TD-DFT investigation

E. Podda, M. Arca, A. Pintus, V. Lippolis, C. Caltagirone, S. J. Coles, J. B. Orton, G. Ennas, G. Picci, R. P. Davies and M. C. Aragoni, CrystEngComm, 2023, 25, 1058 DOI: 10.1039/D2CE01552H

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