title: Tetranuclear Heterometallic {Zn2Eu2} Complexes With 1-Naphthoate Anions: Synthesis, Structure and Photoluminescence Properties.
abstract: A series of new tetranuclear heterometallic Zn(II) -Eu(III) complexes have been synthesized, that is, (bpy)2 Zn2Eu2 (naph)10 (1), (bpy)2 Zn2Eu2 (naph)8 (NO3)2 (2), and (phen)2 Zn2Eu2 (naph)8 (NO3)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 NO3(-) 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.
authors.affiliation: N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 31, 119991, Moscow, Russia.
authors.forename: Anna
authors.initials: A
authors.lastname: Goldberg
authors.affiliation: N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 31, 119991, Moscow, Russia.
authors.forename: Mikhail
authors.initials: M
authors.lastname: Kiskin
authors.affiliation: Physics Department of M.V. Lomonosov, Moscow State University, Leninskie Gory 1, 119991, Moscow, Russia.
authors.forename: Olga
authors.initials: O
authors.lastname: Shalygina
authors.affiliation: N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 31, 119991, Moscow, Russia.|National Research Tomsk State University, Lenina Avenue 36, 634050, Tomsk, Russia.
authors.forename: Sergey
authors.initials: S
authors.lastname: Kozyukhin
authors.affiliation: N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 31, 119991, Moscow, Russia.
authors.forename: Zhanna
authors.initials: Z
authors.lastname: Dobrokhotova
authors.affiliation: N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 31, 119991, Moscow, Russia. sanikol@igic.ras.ru.
authors.forename: Stanislav
authors.identifier: http://orcid.org/0000-0001-9525-9215
authors.initials: S
authors.lastname: Nikolaevskii
authors.affiliation: N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 31, 119991, Moscow, Russia.
authors.forename: Alexey
authors.initials: A
authors.lastname: Sidorov
authors.affiliation: Physics Department of M.V. Lomonosov, Moscow State University, Leninskie Gory 1, 119991, Moscow, Russia.
authors.forename: Sergey
authors.initials: S
authors.lastname: Sokolov
authors.affiliation: Physics Department of M.V. Lomonosov, Moscow State University, Leninskie Gory 1, 119991, Moscow, Russia.|National Research Tomsk State University, Lenina Avenue 36, 634050, Tomsk, Russia.
authors.forename: Victor
authors.initials: V
authors.lastname: Timoshenko
authors.affiliation: A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova St., 28, 119991, Moscow, Russia.
authors.forename: Alexander
authors.initials: A
authors.lastname: Goloveshkin
authors.affiliation: N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 31, 119991, Moscow, Russia.
authors.forename: Igor
authors.initials: I
authors.lastname: Eremenko
keywords: europium complexes; heterometallic complexes; lifetime; luminescence; zinc complexes