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Photophysical Properties of Luminescent Zinc(II)‒Pyridinyloxadiazole Complexes and their Glassy Self‐Assembly Networks
Author(s) -
Panunzi Barbara,
Concilio Simona,
Diana Rosita,
Shikler Rafi,
Nabha Shiran,
Piotto Stefano,
Sessa Lucia,
Tuzi Angela,
Caruso Ugo
Publication year - 2018
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.201800344
Subject(s) - chemistry , moiety , pyridine , zinc , luminescence , stoichiometry , photoluminescence , self assembly , photochemistry , polymer chemistry , inorganic chemistry , stereochemistry , organic chemistry , physics , optics , optoelectronics
Three multifunctional ligands containing 2,5‐disubstituted‐oxadiazole units including an ortho/meta/para ‐substituted pyridine moiety have been synthesized. The reactions of the ligands with zinc(II) acetate in pyridine gave crystalline complexes with the general formula [Zn(L i ) 2 py 2 ]. On the other hand, zinc‐assisted self‐assembly of the ligands in the absence of pyridine led to stable glassy networks with the general stoichiometry [Zn(L i ) 2 ]. The direct involvement of the pyridine moiety in the coordination of the metal was observed in all cases. The spectroscopic behaviour of the complexes was explored and compared. In particular, medium‐to‐high photoluminescent quantum yields were observed for thin films produced from both crystalline and glass samples. Molecular and periodic calculations were performed by using DFT to rationalize the photophysical behaviour.