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Color Tuning and Noteworthy Photoluminescence Quantum Yields in Crystalline Mono‐/Dinuclear Zn II Complexes
Author(s) -
Argeri Mario,
Borbone Fabio,
Caruso Ugo,
Causà Mauro,
Fusco Sandra,
Panunzi Barbara,
Roviello Antonio,
Shikler Rafi,
Tuzi Angela
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402717
Subject(s) - photoluminescence , chemistry , crystallography , substituent , pyridine , density functional theory , ligand (biochemistry) , zinc , quantum yield , crystal structure , single crystal , stereochemistry , computational chemistry , fluorescence , medicinal chemistry , materials science , organic chemistry , optics , biochemistry , receptor , optoelectronics , physics
A series of Zn II complexes with an O , N , O tridentate core is reported. Four species of the general formula ZnL i Py 2 were obtained from pyridine, where L i is a substituted 4‐[(aroylhydrazono)methyl]‐3‐hydroxyphenyl 4‐(octyloxy)benzoate group. Crystal structures were solved by single‐crystal X‐ray diffraction. Nematogenic phase behavior was detected only for the ligands. Photoluminescence spectra were recorded both in solution and in the solid state, and the complexes showed noteworthy photoluminescence in the solid state with wavelengths tunable by varying the aroyl group. Medium to very high photoluminescence quantum yields (PLQY) were recorded on the crystalline complexes obtained in their mononuclear coordination environments. In the case of a 4‐nitrobenzoyl substituent on the ligand, a dinuclear complex with formula Zn 2 L 4 2 Py 2 showed an unprecedented and exceptionally high PLQY value for a crystalline zinc complex. Molecular and periodic calculations were performed by using Density Functional Theory (DFT).