Cobalt(II) Coordination Polymers Containing trans‐1,2‐Bis(4‐pyridyl)ethene and Their Magnetic Properties

Abstract

Reaction of the Co II ion and the bpe [trans-1,2-bis(4-pyridyl)-ethene] ligand in the presence of the CH 3

Synthesis and characterization of two isomorphous cobalt(II), nickel(II) complexes with (63)(67,83)topologies

“…The negative θ is slightly larger than the typically fitted θ value of −14 K for mononuclear Co(II) complexes, indicating the existence of weak antiferromagnetic coupling interaction between Co(II) ions in 1[9]. Moreover, since the separation between the Co(II) ions is long (the shortest Co-Co distance in 1 is about 7.77 Å), the magnetic interaction between the Co(II) ions should be weak [10]. Thus we can conclude from the result that there is a weak antiferromagnetic coupling interaction between Co(II) ions in complex 1.…”

Metal-directed assembly of metal(II) benzoates (M = Mn, Ni, Co, Cu, Zn, and Cd) with 1,2-bis(4-pyridyl)ethene: Light- and photo-induced [2 + 2] cycloaddition

“…We report here the syntheses, structures, thermal stabilities, and photoluminescence of four novel M II coordination polymers (1-Mn, 3-Ni, 4-Cu, and 6-Cd), and comparison of coordination geometries of metal ions including the previously known compounds 2-Co [12] and 5-Zn [21]. Moreover, light and photo-induced [2 + 2] cycloaddition is discussed.…”

“…Moreover, the influence of the metal ion effects was also investigated from the reaction of various metal-benzoates with a rigid ligand 4,4′-bipyridine (4,4′-bpy) [18] and a bridging flexible ligand 1,2-bis(4-pyridyl)ethane (bpa) [19]. Importantly, the assembly process of metal-benzoates and bipyridyl ligands has been highly influenced by solvent system [17], pH [20], metal-to-ligand ratio [17], and the coordination geometry of metal ions [19].We report here the syntheses, structures, thermal stabilities, and photoluminescence of four novel M II coordination polymers (1-Mn, 3-Ni, 4-Cu, and 6-Cd), and comparison of coordination geometries of metal ions including the previously known compounds 2-Co [12] and 5-Zn [21]. Moreover, light and photo-induced [2 + 2] cycloaddition is discussed.…”

“…The physical properties of coordination polymers mostly depend on the topology of the overall structure of the frameworks [6][7][8][9][10][11][12][13]. One-, two-, and three-dimensional structures of coordination polymers are constructed by self assembly process from metal ions or metal clusters with appropriate organic ligands through coordination bonds [14,15].…”

One-Dimensional Polymers Constructed with Paddle-Wheel Dinuclear Copper(II) Bridged by 4,4′-Bipyridine

“…This interest stems from their intriguing variety of topologies and structural diversity and from their potential applications as functional materials, such as gas storage, ion-exchange, catalysis, magnetism, and molecular sensing [4][5][6][7]. Therefore, rational design and construction of new materials with specific networks has become a particularly important and topical subject.…”