Premium
Tetranuclear Heterometallic {Zn 2 Eu 2 } Complexes With 1‐Naphthoate Anions: Synthesis, Structure and Photoluminescence Properties
Author(s) -
Goldberg Anna,
Kiskin Mikhail,
Shalygina Olga,
Kozyukhin Sergey,
Dobrokhotova Zhanna,
Nikolaevskii Stanislav,
Sidorov Alexey,
Sokolov Sergey,
Timoshenko Victor,
Goloveshkin Alexander,
Eremenko Igor
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201501315
Subject(s) - photoluminescence , zinc , crystallography , materials science , chemistry , inorganic chemistry , optoelectronics , metallurgy
A series of new tetranuclear heterometallic Zn II ‐Eu III complexes have been synthesized, that is, (bpy) 2 Zn 2 Eu 2 (naph) 10 ( 1 ), (bpy) 2 Zn 2 Eu 2 (naph) 8 (NO 3 ) 2 ( 2 ), and (phen) 2 Zn 2 Eu 2 (naph) 8 (NO 3 ) 2 ( 3 ), and other ones, where naph − is the 1‐naphthoate anion, bpy=2,2′‐bipyridyl, and phen=1,10‐phenanthroline. The solid‐phase complexes consist of large supramolecular ensembles due to stacking interactions between the aromatic ligands. Photoluminescence (PL) measurements were carried out to study PL spectra, lifetimes and quantum yields (QY) of the synthesized complexes at different temperatures. The external QY for the solid phases of complexes under UV excitation was found to exceed 20 %. It has been shown that partial replacement of naphthoate ligands in the coordination environment of Eu 3+ by NO 3 − anions influences the PL properties. To investigate the behavior of these complexes in solvent, we dissolved complex 3 in MeCN, put it on a transparent glass as a substrate, and studied the PL properties at room temperature.