Tetranuclear heterometallic {Zn2Eu2} complexes with 1-naphthoate anions: synthesis, structure and photoluminescence propertiesстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 9 июня 2016 г.
Аннотация:A series of new tetranuclear heterometallic ZnII-EuIII complexes have been synthesized, i.e. (bpy)2Zn2Eu2(naph)10 (1), (bpy)2Zn2Eu2(naph)8(NO3)2 (2), and (phen)2Zn2Eu2(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 measurements were carried to study PL spectra, lifetimes and quantum yields 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 Eu3+ by NO3- anions influences the PL properties. To investigate behavior of these complexes in solvent we dissolved a complex 3 in MeCN, put it on transparent glass as a substrate and studied the PL properties at room temperature.