A Series of Zinc(II) 3D → 3D Interpenetrated Coordination Polymers Based On Thiophene-2,5-dicarboxylate and Bis(Imidazole) Derivative Linkers
作者:Hakan Erer、Okan Zafer Yeşilel、Mürsel Arıcı
DOI:10.1021/acs.cgd.5b00276
日期:2015.7.1
Six coordination polymers of Zn(II) ions and three organic linkers namely, [Zn(μ4-tdc)(μ-bmeib)0.5]n (1), [Zn(μ4-tdc)(μ-betib)0.5]n (2), [Zn(μ4-tdc)(μ-bisopib)0.5]n (3), [Zn(μ4-tdc)(μ-pbmeix)0.5]n (4), [Zn(μ4-tdc)(μ-pbetix)0.5]n (5), [Zn(μ4-tdc)(μ-pbisopix)0.5]n (6), bisopib, pbetix, and pbisopix, where H2tdc = thiophene-2,5-dicarboxylic acid, bmeib = 1,4-bis(2-methyl-1H-imidazol-1-yl)butane, betib = 1,4-bis(2-ethyl-1H-imidazol-1-yl)butane, bisopib = 1,4-bis(2-isopropyl-1H-imidazol-1-yl)butane, pbmeix = 1,4-bis((2-methyl-1H-imidazol-1-yl)methyl)benzene, pbetix = 1,4-bis((2-ethyl-1H-imidazol-1-yl)methyl)benzene, pbisopix = 1,4-bis((2-isopropyl-1H-imidazol-1-yl)methyl)benzene, have been synthesized and structurally characterized by elemental analysis, IR spectra, NMR spectra and single-crystal and powder X-ray diffractions. Compounds 1–6 are isostructural and display a 3D cubic structure with 2-fold interpenetrated nets. Two crystallographically independent Zn(II) ions are bridged by four different thiopehene-2,5-dicarboxlylate linkers adopting a bis(monodentate) coordination mode to form a paddle-wheel unit forming two-dimensional layers. These 2D layers containing paddle-wheel unit are further pillared by bridging bis(imidazole) derivative linkers forming a 3D framework. Moreover, topological analyses show that two 3D frameworks are interlocked with each other to give a 2-fold interpenetrating pcu net with 412.63 topology. Interestingly, compound 3 is a 2-fold heterointerpenetrating 2(1 + 1) three-dimensional (3D) framework. In addition, photoluminescence properties, thermal stabilities and Cu(II) ion exchange properties of the compounds were also investigated.
Zn(II) 离子和三个有机连接体的六种配位聚合物,即 [Zn(μ4-tdc)(μ-bmeib)0.5]n (1)、[Zn(μ4-tdc)(μ-betib)0.5]n ( 2)、[Zn(μ4-tdc)(μ-bisopib)0.5]n (3)、[Zn(μ4-tdc)(μ-pbmeix)0.5]n (4)、[Zn(μ4-tdc)(μ -pbetix)0.5]n (5)、[Zn(μ4-tdc)(μ-pbisopix)0.5]n (6)、bisopib、pbetix 和 pbisopix,其中 H2tdc = 噻吩-2,5-二羧酸,bmeib = 1,4-双(2-甲基-1H-咪唑-1-基)丁烷,betib = 1,4-双(2-乙基-1H-咪唑-1-基)丁烷,bisopib = 1,4-双( 2-异丙基-1H-咪唑-1-基)丁烷,pbmeix = 1,4-双((2-甲基-1H-咪唑-1-基)甲基)苯,pbetix = 1,4-双((2-乙基-1H-咪唑-1-基)甲基)苯,pbisopix = 1,4-双((2-异丙基-1H-咪唑-1-基)甲基)苯,已合成并通过元素分析、红外进行结构表征光谱、NMR 光谱以及单晶和粉末 X 射线衍射。化合物 1-6 是同构的,并显示出具有 2 重互穿网的 3D 立方结构。两个晶体学上独立的 Zn(II) 离子通过四个不同的噻吩-2,5-二羧酸酯连接体桥接,采用双(单齿)配位模式,形成桨轮单元,形成二维层。这些含有桨轮单元的 2D 层进一步通过桥接双(咪唑)衍生物连接体形成 3D 框架。此外,拓扑分析表明,两个 3D 框架相互连锁,形成具有 412.63 拓扑的 2 倍互穿 pcu 网络。有趣的是,化合物3是2重异质互穿2(1 + 1)三维(3D)框架。此外,还研究了化合物的光致发光性能、热稳定性和Cu(II)离子交换性能。