The 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 dimensionality and wingspan of L4–. The 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.
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
Enrico Podda;Massimiliano Arca;Anna Pintus;Vito Lippolis;Claudia Caltagirone;Guido Ennas;Giacomo Picci;M. Carla Aragoni
2023-01-01
Abstract
The 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 dimensionality and wingspan of L4–. The 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.
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