Please use this identifier to cite or link to this item:
Title: Influence of the intramolecular hydrogen bond on the fluorescence of 2-ortho-aminophenyl pyridines
Author: Esteves, Cátia I. C.
Fontes, Luís F. B.
Rocha, João
Silva, Artur M. S.
Guieu, Samuel
Keywords: Coloring Agents
Hydrogen Bonding
Spectrometry, Fluorescence
Issue Date: 22-Sep-2022
Abstract: The dynamic nature of excited-state intramolecular proton transfer (ESIPT) and its effect on emission spectra is an attractive strategy to create multi-emissive dyes. Here we describe the behavior of a series of hydrogen-bonded triphenylpyridines with a set of donor-acceptor combinations that allowed us to perceive the influence of each substitution on the photophysical properties of the dyes. The susceptibility of these ESIPT moieties to pH variations was also studied, elucidating that the level of protonation had a significant effect on the emission color. The assignment of each emission band was made by using DFT and td-DFT calculations that were in agreement with the experimental results. This study emphasizes the versatility of triphenylpyridines that can be synthesized effortlessly with a logical and independent C-2, C-4 and C-6 substitution in order to have the desired ESIPT modulation and subsequent multi-emission response.
Peer review: yes
DOI: 10.1002/chem.202201844
Appears in Collections:CICECO - Artigos
DQ - Artigos
REQUIMTE - Artigos

Formato BibTex MendeleyEndnote Degois 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.