Syntheses, Crystal Structures, and Magnetic Properties of Metal–Organic Hybrid Materials of Mn(II)/Co(II): Three-Fold Interpenetrated α-Polonium-like Network in One of Them

Abstract

Three new 1,4-phenylenediacrylate bridged Mn(II) and Co(II) complexes with the molecular formulae {[Mn2(phen)4(H2O)2(ppda)]•(ppda)•2(H2O)}(1), {[Co(ppda)(dpyo)(H2O)3]•4(H2O)}n (2), and {[Co(ppda)(bpe)]•(0.5H2O)}n (3) [phen = 1,10phenanthroline; ppda = 1,4-phenylenediacrylate; dpyo = 4,4´-dipyridyl N,N´-dioxide; bpe = 1,2bis(4-pyridyl)ethane] have been synthesized and characterized by elemental analysis, IR spectra,single-crystal X-ray diffraction studies and low temperature magnetic measurements. Structural determination reveals that complex 1 is dinuclear, 2 is a 1D polymeric chain, while 3 is a threefold interpenetrated α-polonium-like network. Hydrogen bonding interactions, formed by coordinated and/or lattice water molecules with ppda oxygen, and  staking interactions of aromatic rings lead to a 3D supramolecular architecture in both complexes 1 and 2. Low 2 temperature magnetic study shows antiferromagnetic coupling in all the complexes. In addition, their electronic and fluorescent spectral properties have also been investigated.

Novel metal-organic hybrid materials constructed by ferrocenyl terpyridine derivatives and ZnIIX2 (X = Cl−, Br−, I−, SCN− and CH3COO−)

“…After 12 h reflux, the precipitate was collected by filtration, washed with distilled water and EtOH, and recrystallized from EtOH to give the compound, as red needle crystals suitable for single crystal X-ray diffraction analysis, 4.670 g (56.0%). 1 Table 1 Crystallographic data and structural refinement parameters for L and complexes 1e5. …”

“…Presently, although the coordination effect between the ligands and the metal ions in the MOMs can be predicted, it is impossible to control the overall packing structures of the molecules because of the multiple weak intermolecular interactions which affect the molecular packing mostly [15,16]. As a result, the variation of backbone flexibility, substituent groups, molecular size and experimental conditions, such as solvents, metal-to-ligand ratio, and symmetry of organic linkers, can also affect the structures and properties of the MOMs [1,16]. So far, it is still very difficult to obtain the supramolecular structure of the MOMs designed in advance.…”

Crystal structure of poly[diaqua-μ5-4-(3,5-dicarboxylato-κ 3 O 1:O 2:O 3-phenoxy)phthalato-κ 3 O 5,O 7:O 8)(μ2-4-(1H-pyrazol-5-yl)pyridine-κ

“…However, it still remains a great and long-term challenge to predict exactly the molecular structure and property of coordination polymers because of many subtle factors involved in the formation and crystallization process such as the geometries of the metal ions (node) and ligands (linker), supramolecular interaction, and reaction conditions [5]. One strategy is to perform reactions with mixed-ligands such as polycarboxylate and N-containing ligands in the same system, and a great number of novel intriguing structures are obtained [6][7][8][9], which indicates that the introduction of N-containing auxiliary ligands into a metal-polycarboxylate system often leads to structural diversity and a ords novel frameworks. The asymmetric unit of the title structure contains two Co(II) ions, and 4-(3,5-dicarboxylato-phenoxy)phthalato as well as 4-(1H-pyrazol-5-yl)pyridine as bridging ligands to construct a coordination polymer.…”

A Water‐Rich Cobalt(II) Compound: Hydrothermal Synthesis, Spectroscopic, Thermal, Crystal Structure Characterization and Antimicrobial Properties

“…4 T 1g (P) transition arising from the 3d 7 cobalt(II) center (vide infra). [35,38,[41][42][43] The solid-state fluorescence emission spectrum of 1 obtained by both methods were recorded to understand emission properties of 1 at an excitation of 300 nm and were compared with the constituting free co-ligands H 2 ppda and phen. The emission bands for H 2 ppda appear at 407 and 430 nm were attributed to the intra-ligand π*!n or π*!π energy transitions (Figure S3).…”