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Thermo-Induced Fluorochromism in Two AIE Zinc Complexes: A Deep Insight into the Structure-Property Relationship

Solid-state emitters exhibiting mechano-fluorochromic or thermo-fluorochromic responses represent the foundation of smart tools for novel technological applications. Among fluorochromic (FC) materials, solid-state emissive coordination complexes offer a variety of fluorescence responses related to t...

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Autores principales: Diana, Rosita, Caruso, Ugo, Gentile, Francesco Silvio, Di Costanzo, Luigi, Musto, Pellegrino, Panunzi, Barbara
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9025698/
https://www.ncbi.nlm.nih.gov/pubmed/35458748
http://dx.doi.org/10.3390/molecules27082551
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author Diana, Rosita
Caruso, Ugo
Gentile, Francesco Silvio
Di Costanzo, Luigi
Musto, Pellegrino
Panunzi, Barbara
author_facet Diana, Rosita
Caruso, Ugo
Gentile, Francesco Silvio
Di Costanzo, Luigi
Musto, Pellegrino
Panunzi, Barbara
author_sort Diana, Rosita
collection PubMed
description Solid-state emitters exhibiting mechano-fluorochromic or thermo-fluorochromic responses represent the foundation of smart tools for novel technological applications. Among fluorochromic (FC) materials, solid-state emissive coordination complexes offer a variety of fluorescence responses related to the dynamic of noncovalent metal-ligand coordination bonds. Relevant FC behaviour can result from the targeted choice of metal cation and ligands. Herein, we report the synthesis and characterization of two different colour emitters consisting of zinc complexes obtained from N,O bidentate ligands with different electron-withdrawing substituents. The two complexes are blue and orange solid-state fluorophores, respectively, highly responsive to thermal and mechanical stress. These emitters show a very different photoluminescent (PL) pattern as recorded before and after the annealing treatment. Through X-ray structural analysis combined with thermal analysis, infrared (IR) spectroscopy, PL, and DFT simulation we provide a comprehensive analysis of the structural feature involved in the fluorochromic response. Notably, we were able to correlate the on-off thermo-fluorochromism of the complexes with the structural rearrangement at the zinc coordination core.
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spelling pubmed-90256982022-04-23 Thermo-Induced Fluorochromism in Two AIE Zinc Complexes: A Deep Insight into the Structure-Property Relationship Diana, Rosita Caruso, Ugo Gentile, Francesco Silvio Di Costanzo, Luigi Musto, Pellegrino Panunzi, Barbara Molecules Article Solid-state emitters exhibiting mechano-fluorochromic or thermo-fluorochromic responses represent the foundation of smart tools for novel technological applications. Among fluorochromic (FC) materials, solid-state emissive coordination complexes offer a variety of fluorescence responses related to the dynamic of noncovalent metal-ligand coordination bonds. Relevant FC behaviour can result from the targeted choice of metal cation and ligands. Herein, we report the synthesis and characterization of two different colour emitters consisting of zinc complexes obtained from N,O bidentate ligands with different electron-withdrawing substituents. The two complexes are blue and orange solid-state fluorophores, respectively, highly responsive to thermal and mechanical stress. These emitters show a very different photoluminescent (PL) pattern as recorded before and after the annealing treatment. Through X-ray structural analysis combined with thermal analysis, infrared (IR) spectroscopy, PL, and DFT simulation we provide a comprehensive analysis of the structural feature involved in the fluorochromic response. Notably, we were able to correlate the on-off thermo-fluorochromism of the complexes with the structural rearrangement at the zinc coordination core. MDPI 2022-04-14 /pmc/articles/PMC9025698/ /pubmed/35458748 http://dx.doi.org/10.3390/molecules27082551 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Diana, Rosita
Caruso, Ugo
Gentile, Francesco Silvio
Di Costanzo, Luigi
Musto, Pellegrino
Panunzi, Barbara
Thermo-Induced Fluorochromism in Two AIE Zinc Complexes: A Deep Insight into the Structure-Property Relationship
title Thermo-Induced Fluorochromism in Two AIE Zinc Complexes: A Deep Insight into the Structure-Property Relationship
title_full Thermo-Induced Fluorochromism in Two AIE Zinc Complexes: A Deep Insight into the Structure-Property Relationship
title_fullStr Thermo-Induced Fluorochromism in Two AIE Zinc Complexes: A Deep Insight into the Structure-Property Relationship
title_full_unstemmed Thermo-Induced Fluorochromism in Two AIE Zinc Complexes: A Deep Insight into the Structure-Property Relationship
title_short Thermo-Induced Fluorochromism in Two AIE Zinc Complexes: A Deep Insight into the Structure-Property Relationship
title_sort thermo-induced fluorochromism in two aie zinc complexes: a deep insight into the structure-property relationship
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9025698/
https://www.ncbi.nlm.nih.gov/pubmed/35458748
http://dx.doi.org/10.3390/molecules27082551
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