Fig 5 - uploaded by Xiu-Yan Dong
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Schematic diagram of the proportion of short range interactions on the Hirshfeld surfaces of complexes 1 and 2 ration has not changed at room temperature. Since complexes 1 and 2 are isomorphic and their unit cell parameters are consistent, complex 1 is used as the representative to test their purity.
Citations
Two new manganese(II) coordination polymers (CPs) have been synthesized using Mn(SO4)2•6H2O, 2,4-[6-(4-carboxyphenyl)pyrazin-2-yl]benzoic acid (H2L) and two auxiliary N-donor linkers, 1,10-phenanthroline (phen) and 1,4-bis(1H-imidazol-1-yl)benzene (dib) to assist in the self-assembly process....
The reaction of zinc(II) nitrate with 5-iodoisophthalic acid (5-I-IPAH) in N,N-dimethylformamide afforded the layered coordination polymer {Zn(5-I-IPA)}n(1). The structure of 1 was determined by single-crystal X-ray diffraction. The phase purity of 1 was confirmed by powder X-ray diffraction. The molecular electrostatic potentials of iodine atoms, which characterize their ability to form a halogen bond, were determined by quantum chemical calculations.
We have designed and synthesized two new Co-CPs by modulating the concentration of cobalt ions, namely [Co3(HL)2(4,4′-bibp)3(H2O)4]n (1) and {[Co9(L)4(4,4′-bibp)4(H2O)6(μ2-OH)2]·4,4′-bibp·2H2O}n (2) (H4L = 1,1′,2′,1″-terphenyl-4,4′,4″,5′-tetracarboxylic acid and 4,4′-bipb = 1,4-di(pyridin-4-yl)benzene). CP 1 is a three-dimensional (3D) pillar-layered network constructed by HL³⁻ and bridging 4,4′-bibp co-ligands with a 10-connected (4²⁴.5¹².6⁸.7) topology. CP 2 is a 3D reticular framework with (4,4,5,5,6)-connected topology. The structural diversity of the two CPs suggests that the cluster numbers and the different local coordination geometries of Co(II) ions can be induced by the reaction material ratio. Focusing on the bridging system, CP 1 cnsists of centrosymmetric trinuclear octahedral cobalt(II) units, and within the units, the cobalt(II) ions are found to be ferromagnetically coupled. CP 2 cnsists of centrosymmetric nonanuclear cobalt(II) units, including five octahedral and four trigonal-bipyramidal cobalt(II) ions. Antiferromagnetic interactions are observed in the partial triangular units, and also in the other parts, showing an overall antiferromagnetic behavior.
Two new complexes based on 4,4'‐[1,3‐Phenylenebis (oxy)] diphthalic acid (H4L) ligands were synthesized, named [Cd2(L)(1,10‐phen)2(H2O)]n(1) and [Co2(L)(1,10‐phen)2(H2O)]n(2), in which 2D structures transform into 3D supramolecular structures by C‐H···π interaction. The proton conductivity of complexes 1 and 2 at low temperature is close (σ1 = 3.12 x 10‐8 S cm‐1 and σ2= 3.81 x 10‐8 S cm‐1 at 30 °C), but two different conduction mechanisms in the proton conduction test. The Vehicular mechanism in 1 is caused by the O···H/H···O contact in 1 which is stronger than 2, and the Grotthuss mechanism in 2 is caused by the N···H/H···N contacts in 2 which is stronger than 1. At the same time, complex 1 showed excellent antibacterial properties in vitro, mainly reflected in that five kinds of bacteria (Escherichia coli, Bacillus amyloliquefaciens, Pantoea agglomerans, Pseudomonas putida and odof bacteria) could play an obvious inhibitory effect in the concentration range of 20 μg·mL‐1.
