A Series of Three-Dimensional 4d−4f Heterometallic Coordination Polymers with Six-Connected Doubly Interpenetrated pcu Net Topology: Structural, Photoluminescent, and Magnetic Properties

Abstract

A series of lanthanide(III)-Ag(I) 4d-4f heterometallic coordination polymers (HCPs) with pcu topology, {[Ln III -Ag I (Hbidc)(bidc)(ox) 0.5 (H 2 O)] 3 H 2 O} n (Ln = Sm 1, Eu 2, Gd 3, Tb 4, Dy 5, Ho 6, Er 7, H 2 bidc =1H-benzimidazole-5,6dicarboxylic acid, ox=oxalate), have been synthesized through self-assembly reactions. All seven complexes are isostructural and have three-dimensional 2-fold interpenetrated structures, with both the organic ligand and oxalate groups acting as bridges. These new complexes crystallize with the same unique six-connected three-nodal net described by (10 8 3 12 3 16 4 3 18 2 ) (10) 6 topology. The ferromagnetic properties of complex 3 were investigated. Moreover, complexes 1, 2, 4, and 5 exhibit very strong photoluminescence properties and with long lifetimes in the solid state at room temperature.

Synthesis, structures, luminescent and magnetic properties of four coordination polymers with the flexible 1,3-phenylenediacetate ligands

“…[1][2][3][4][5][6][7]. One of the obvious challenges is the rational and controllable preparation of metal-organ frameworks, the formation of which is greatly affected by the organic ligands, the nature of the metal ions, counterions, pH values of the reaction solution, ancillary ligands and other factors [8][9][10].…”

Ln-Ag heterometallic coordination polymers

“…Brought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 7/7/15 8:04 AM (147)) (Li et al 2010a). The Ag + adopts a trans-mode to coordinate with the two imidazole rings and has a distorted linear geometry.…”

“…For the magnetic properties, because Ag + is a diamagnetic metal ion, so the magnetic properties of Ln-Ag heterometallic coordination polymers are focused on Ln ions. The magnetic properties of Ln-Ag heterometallic coordination polymers were explored in 10 references (Zhao et al 2005, Cai et al 2009a, Zhao et al 2009a, Chen et al 2010, Li et al 2010a, including Ce, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb. The χ M T value of these compounds (except Gd-Ag compounds) all decreases on cooling.…”

Zn(II) and Cd(II) Coordination Polymers with an N,O-Donor Ligand: Structural Characterization and Fluorescence Properties

“…The emission decay lifetimes of complexes 1-3 were measured on an FLS920 spectrofluorimeter under ambient temperature and were analyzed with two exponentials functions f (t) [37,38]:…”