Heterobimetallic [NiIILnIII] (Ln = Sm and Tb) N2O4-donor coordination polymers: Syntheses, crystal structures and fluorescence properties

Publication date: Available online 18 February 2020Source: Inorganica Chimica ActaAuthor(s): Lin-Wei Zhang, Yu Zhang, Yong-Fan Cui, Meng Yu, Wen-Kui DongAbstractThrough the self-assembly of a 3-EtO salamo H2L with nickel acetate tetrahydrate, lanthanide nitrate hexahydrate (Ln = Sm and Tb) and terephthalic acid (H2bdc), two new heterobimetallic [NiIILnIII] 3d-4f polymers, 2∞[Ni(L)Sm(bdc)1.5]·CH3OH (1) and 1∞[Ni(L)Tb(NO3)(DMF)(bdc)] (2) were synthesized, respectively. Coordination polymers 1 and 2 were characterized via elemental analysis, X-ray single-crystal analysis, IR and UV- visible absorption spectroscopy. Coordination polymer 1 is a 2D coordination polymer in which [Ni(L)Sm] units are linked by exodentate (bdc)2− linker. Coordination polymer 2 is a 1D chain coordination polymer in which the [Ni(L)Tb(NO3)] moieties are connected by exodentate (bdc)2− linker, and they further form a 3D supramolecular configuration through intermolecular hydrogen bondings. Fluorescence properties of coordination polymers 1 and 2 have been discussed.Graphical abstractThrough the self-assembly of a 3-EtO salamo H2L with nickel acetate tetrahydrate, Lanthanide nitrate hexahydrate (Ln = Sm and Tb), and terephthalic acid (H2bdc), two new heterobimetallic [NiIILnIII] 3d-4f polymers, 2∞[Ni(L)Sm(bdc)1.5]·CH3OH (1) and 1∞[Ni(L)Tb(NO3)(DMF)(bdc)] (2) were synthesized, respectively.

Source: Inorganica Chimica Acta - February 20, 2020 Category: Chemistry Source Type: research