Entangled Zn(ii)/Cd(ii) coordination complexes based on a flexible bis(methylbenzimidazole) ligand and different dicarboxylates
文献信息
Lu Liu, Chao Huang, Zhengchuang Wang, Dongqing Wu, Hongwei Hou, Yaoting Fan
Eight entangled coordination complexes, formulated as [M(hbmb)0.5(o-phda)]n [M = Zn (1), Cd (2)], {[M(hbmb)(p-phda)]·H2O}n [M = Zn (3), Cd (4)], [M(hbmb)0.5(oba)]n [M = Zn (5), Cd (6)], {[M(hbmb)(sdba)]m}n [M = Zn, m = 2 (7); m = 1, Cd (8)] (H2phda = phenylenediacetic acid, H2oba = 4,4′-oxybis(benzoic acid), H2sdba = 4,4′-sulfonyldibenzoic acid), have been prepared by hydrothermal reactions of the flexible ligand 1,1′-(1,6-hexane)bis-(2-methylbenzimidazole)) (hbmb) with metal ions in the presence of various dicarboxylate coligands. Isostructural complexes 1 and 2 reveal 6-connected self-penetrating three-dimensional (3D) frameworks with (44·610·8)-roa topologies. 3 and 4 display 4-fold interpenetrating 3D frameworks with 66-dia topologies. 5 and 6 exhibit 3D 2-fold interpenetrating 6-connected frameworks with (412·63)-pcu topologies. Both 7 and 8 are 3D frameworks constructed through unusual 2D → 3D parallel interpenetration of corrugated 2D (4,4) nets, of which 7 shows a 4-connected (44·62)2 topology and 8 presents a 4-connected 44·62 topology. A systematic structural comparison of four pairs of complexes shows that the frameworks can be tuned by various dicarboxylate coligands and changeable conformations of the hbmb ligand. In addition, the chemical stability, thermal stability and photoluminescent properties of complexes 1–8 have also been investigated.
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CrystEngComm is the forum for the design and understanding of crystalline materials. We welcome studies on the investigation of molecular behaviour within crystals, control of nucleation and crystal growth, engineering of crystal structures, and construction of crystalline materials with tuneable properties and functions. We publish hypothesis-driven research into… how crystal design affects thermodynamics, phase transitional behaviours, polymorphism, morphology control, solid state reactivity (crystal-crystal solution-crystal, and gas-crystal reactions), optoelectronics, ferroelectric materials, non-linear optics, molecular and bulk magnetism, conductivity and quantum computing, catalysis, absorption and desorption, and mechanical properties. Using Techniques and methods including… Single crystal and powder X-ray, electron, and neutron diffraction, solid-state spectroscopy, spectrometry, and microscopy, modelling and data mining, and empirical, semi-empirical and ab-initio theoretical evaluations. On crystalline and solid-state materials. We particularly welcome work on MOFs, coordination polymers, nanocrystals, host-guest and multi-component molecular materials. We also accept work on peptides and liquid crystals. All papers should involve the use or development of a design or optimisation strategy. Routine structural reports or crystal morphology descriptions, even when combined with an analysis of properties or potential applications, are generally considered to be outside the scope of the journal and are unlikely to be accepted.










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