Syntheses and crystal structures of four manganese coordination polymers with 1,4-bis(1,2,4-triazol-1-yl)butane
摘要:
Four new mangenese coordination polymers {[Mn(btb)(H2O)(4)](NO3)(2)}(n) (1), [Mn(btb)(2)(NO3)(2)](n) (2), {[Mn(btb)(2)(H2O)(2)](NO3)(2)(H2O)(2)}(n) (3) and [Mn(btb)(H2O)(2)(N-3)(2)](n) (4) were synthesized in different solvent systems using the flexible ligand 1,4-bis(1,2,4-triazol-1-yl)butane (btb). The X-ray diffraction analysis shows that 1 and 4 are one-dimensional chain structures, while 2 and 3 form planar and undulating two-dimensional (4,4) networks, respectively. 1 and 4 further form three-dimensional hydrogen bonding networks via hydrogen bonding interactions. The bib ligands exhibit the completely anti conformation in 1, 2 and 4, and the anti-anti-gauche conformation in 3. The thermogravimetric properties of the four coordination polymers were investigated. 3 can convert to 2 by dehydration which is shown by XPRD measurement. 4 can convert to [Mn(btb)(N-3)(2)] by dehydration and this is confirmed by IR of the azide ligand. (c) 2006 Elsevier B.V. All rights reserved.
Solvent–Free Synthesis of Some Triazole-Based Bis(N-Heterocyclic Carbene) Ligands
作者:Jianfeng Zhao、Long Yang、Lingqiao Zhang、Jin Guo、Yanhui Shi、Guangsheng Pang、Changsheng Cao
DOI:10.3184/174751911x13220695999324
日期:2011.12
Two series of bistriazolium dibromides with different alkyl bridged length (n = 2–4) were synthesised through a simple solvent-free method. Six of these compounds were prepared from the reaction of 1-R-1H-1,2,4-triazole with dibromoalkane in moderate to excellent yield (45–98%). However, the other six compounds were prepared from the reaction of alkyl bridged bistriazole with bromoalkane in 55–99%
Retracted: A new porous Co(II)‐coordination polymer for the chemical fixation of CO
<sub>2</sub>
and treatment effect against tuberculosis by reducing the
<i>pckA</i>
expression in
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<i>Mycobacterium tuberculosis</i>
</scp>
method, a novel coordinationpolymer containing Co(II) of [Co(ditb)(tdc)]n·5nH2O (1) was prepared by reacting rigid 2,5‐thiophenedicarboxylic acid with flexible 1,4‐di(1H‐1,2,4‐triazol‐1‐yl)butane using the slow evaporation method. Active samples of 1 (1a for short) showed good stability and the ability to capture CO2. It can be used as a potential heterogeneous catalyst for chemical immobilization
使用混合配体方法,通过使刚性的2,5-噻吩二羧酸与柔性的1,4-二氟乙烷反应,制备了一种新型的含有[Co(ditb)(tdc)] n ·5 n H 2 O(1)的Co(II)的配位聚合物。,4-二(1H-1,2,4-三唑-1-基)丁烷采用缓慢蒸发法。活性样品1(简称1a)显示出良好的稳定性和捕获CO 2的能力。它可以用作潜在的非均相催化剂,用于化学固定环氧化物和CO 2形成环状碳酸酯。另外,催化剂1a在重复使用四次后仍保持其原始结构。对其生物学特性进行了评估体内和体外结核分枝杆菌(M.TB)。首先,通过灭菌曲线测量化合物对M.TB的杀菌能力。然后,使用逆转录聚合酶链反应检测与M.TB生存有关的pckA基因的表达。对于体内研究,进行了菌落形成单位测定,以评估该化合物的抗菌作用,并且酶联免疫吸附测定法用于体内炎症细胞因子的测定。 通过分子对接模拟,确认复合物中的所有三种极性原子都有与蛋白质相互作用的机会。
Cu(<scp>ii</scp>)/Ni(<scp>ii</scp>)–organic frameworks constructed from the homometallic clusters by 5-(2-carboxyphenoxy)isophthalic acid and N-ligand: synthesis, structures and visible light-driven photocatalytic properties
作者:Qi-Wei Xu、Qiu-Shuang Wang、Shan-Shan Li、Xia Li
DOI:10.1039/c9ra01496a
日期:——
clusters [Ni4(μ3-OH)2] SBUs, which are bridged with Ni(1)O4N2 and Ni(2)O6 through O-cpia ligands. It is worth noting that 4, with a 3D structure, is generated from the binuclear clusters [Ni2(COO)4] (Ni(1)O4N) and mononuclear metal Ni(2) cores (Ni(2)O4N2) as SBUs, and bridged by O-cpia/bpy mixed ligands. Meanwhile, the degradation of dyes (RhB) by the complexes under visible light irradiation was studied
Ligands directed versatile cadmium-bis(triazole) metal–organic fragments to generate three new two dimensional complexes based on polymolybdenum phosphate
which are extended into different 2D networks by [Cd(P4Mo6)2] dimers. The –(CH2)n– spacers of the bis(triazole)-based ligands play an important role in the formation of multi-nuclear CdII subunits and the ultimate 3D supramolecular frameworks. Moreover, the thermal stabilities, electrochemical properties of the title compounds have been investigated in this paper.
Hydroxyl- and chloro-bridges as “structural assistants” in the construction of two new Keggin-based 3D frameworks
作者:AiXiang Tian、XiaoLing Lin、XiaoJing Liu、Jun Ying、XiuLi Wang
DOI:10.1039/c3ra41567h
日期:——
Two new Keggin-based three dimensional (3D) frameworks, [CuI4(btb)2(μ-OH)(PW12O40)] (1) and [CuII2(btb)4(μ-Cl)(PW12O40)]·3H2O (2) (btb = 1,4-bis(1,2,4-triazol-1-y1)butane), were synthesized and structurally characterized. In compound 1, the metalâorganic subunit is a wave-like 2D layer consisting of ellipse-shaped tetra-nuclear CuI cycles. Furthermore, these layers are bridged by hydroxyl groups through Cuâ(OH)âCu bonds, resulting in the construction of a 3D porous metalâorganic framework (MOF). The Keggin anions, acting as inorganic templates, are embedded in the channels of the structure. In compound 2, a 2D CuIIâbtb layer exists that incorporates quadrangular tetra-nuclear CuII cycles. The two adjacent layers covalently capture the Keggin anions between them to construct a hamburger-like subunit. Furthermore, these subunits are linked by chloro-bridges (CuâClâCu), which build a 3D framework with channels. The big voids in the channels led to a two-fold interpenetrating structure for compound 2. Additionally, the photocatalytic properties and electrochemical behavior of compounds 1 and 2 have been investigated.