Formation of 0D M5L2 helicate cage and 1D loop-and-chain complexes: stepwise assembly and catalytic activity
文献信息
Lu-Yin Zhang, Yu Liu, Kang Li, Cheng Yan, Shi-Chao Wei, Yong-Xin Chen
The reactions of pyridyl-substituted tripodal ligand 3-TPyMNTB (tris((pyridin-3-ylmethyl)benzimidazol-2-ylmethyl)amine) with Cu(II) chloride give rise to two supramolecular complexes, namely, [Cu5(3-TPyMNTB)2Cl10H2O]·6C3H7NO·11H2O (1), and [Cu5(3-TPyMNTB)2Cl8(H2O)2]Cl2·2CHCl3·2CH2OH (2). The assembly of the two complexes takes place in a stepwise route, including: (1) identical monomeric ML building units are firstly formed in both cases by the coordination of Cu(II) with 3-TPyMNTB using its four central N donors, and (2) the ML units are further linked by the 2-connecting Cu(II) ions through extending pyridyl terminals on the ligands into 0D discrete or 1D infinite structures in complexes 1 and 2, respectively. As a result, 1 presents a unique example of a M5L2 coordination cage which shows a triple helicate shape. Three Bim–Py–Cu(II)–Py–Bim coordination chains constitute the strands of the helicate, which can be outlined by an extending “molecular clip” approach, and such structural character is analyzed in detail in comparison with other known helicate examples. On the other hand, a 1D loop-and-chain structure is formed in complex 2, which can be seen as one strand of the helicate cage in complex 1 being opened up to undergo polymerization. The oxidation catalytic properties of complexes 1 and 2 are tested.
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CrystEngComm

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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