Golbedaghi, RezaILDIZ, GÜLCE ÖĞRÜÇAzadbakht, RezaFausto, Rui2023-03-202023-03-202022Golbedaghi, R., Ildiz, G. O., Azadbakht, R., & Fausto, R. (2022). A new tetramine bis (2-naphthol)-derivative fluorescent chemosensor for aluminum ion (Al3+). Journal of Molecular Structure, 1250, 131775.0022-2860https://doi.org/10.1016/j.molstruc.2021.131775https://hdl.handle.net/11413/8385A new tetramine bis(2-naphthol)-derivative was synthesized and its structure investigated by H-1- and C-13 NMR, UV-Vis absorption and fluorescence spectroscopies, as well as through density functional theory calculations (including time-dependent DFT). The effect of a series of metal ions (Ag+, Al3+, Ba2+, Ca2+, Cd2+, Co2+, Cs (+), Cu2+, Fe2+, Fe3+, K+, Mg2+, Mn2+, Ni2+, Pb2+ and Zn2+) on the fluorescence spectra of the synthesized compound was then investigated and it was observed that the presence of Al3+ ion causes a strong increase in the fluorescence emission of the ligand, by about 70 times. This exceptional intensification is specific for Al3+ within the whole series of ions investigated, together with the selectivity found for many of the remaining ions (in particular the ions of Groups I and II of the Periodic Table and Mn2+), makes the compound a promising candidate to act as chemosensor for Al3+. Possible structures for the ligand:Al3+ complex are suggested based on DFT results. TD-DFT calculations performed on these structures suggest that the fluorescence enhancement upon binding of Al3+ to the ligand results most probably from metal-to-ligand charge transfer where the acceptor groups of the ligand are the naphthol moieties. (C) 2021 Elsevier B.V. All rights reserved.eninfo:eu-repo/semantics/restrictedAccess1H- and 13C NMRAl3+ cationDFT and TD-DFT calculationsFluorescence ChemosensorTetramine bis(2-naphtol) DerivativeUV-Vis Absorption and Fluorescence Emission SpectroscopiesArticle0008530738000052-s2.0-85118740047