Cadmium(II)-N-Ethylimidazole Coordination Polymer via Different Coordination Environment and Chloro Bridges: Synthesis, X-ray Structure, Spectroscopic and Thermal Analysis (original) (raw)
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Journal of Chemical Crystallography, 2013
A novel two-dimensional cadmium complex [Cd 3 (pzta) 2 (l-Cl) 4 H 2 O) 2 ]n (1) has been synthesized hydrothermally by the reaction of pyrazine carbonitrile and sodium azide in the presence of cadmium(II) chloride as Lewis acid catalyst. Complex 1 was characterized by elemental analysis, thermal gravimetric analysis, IR spectroscopy and single-crystal X-ray diffraction. Complex 1 crystallizes in triclinic crystal system, having the P 1 space group, which by utilizing hydrogen-bonding extends the molecular complex into 3D hydrogen-bonded metallosupramolecular networks. It has been shown that N-H-O hydrogen bond based on R 2 2 (26) and R 2 2 (12) supramolecular synthons can be relied upon as effective tools for the assembly and organization of hexa-coordinated complex. Furthermore, compound 1 shows strong photoluminescence properties at room temperature in solid state.
A new three-dimensional bis(benzimidazole)-based cadmium(II) coordination polymer
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 2017
A new coordination polymer (CP), formulated as [Cd(L)(DCTP)]n (1) (L=1,1'-(1,4-butanediyl)bis(2-methylbenzimidazole), H2DCTP=2,5-dichloroterephthalic acid), was synthesized under hydrothermal conditions and the performance as luminescent probe was also investigated. Single-crystal X-ray diffraction reveals CP 1 is a 3D 3-fold interpenetrated dia network with large well-defined pores. It is found that CP 1 revealed highly sensitive luminescence sensing for Fe(3+) ions in acetonitrile solution with a high quenching efficiency of KSV=2541.238L·mol(-1) and a low detection limit of 3.2μM (S/N=3). Moreover, the photocatalytic efficiency of 1 for degradation of methylene blue could reach 82.8% after 135min. Therefore, this coordination polymer could be viewed as multifunctional material for selectively sensing Fe(3+) ions and effectively degrading dyes.
Polyhedron, 2002
Four new coordination polymers of cadmium(II) with hexamethylenetetramine (htm) have been synthesized and characterized by routine physicochemical techniques as well as by X-ray single crystal structure analysis. They are [CdBr(htm) ] n (4). Complexes 1, 2 and 3 exhibit 1D polymeric structure and complex 4 shows a 2D undulated layered arrangement, containing Cd 6 (htm) 6 hexagonal units as building block, which extended to a 3D supramolecular architecture through hydrogen bonding. Thorough thermal investigation suggest that as far as the thermal stability of Cd(II)-htm bond is concerned it attains the maximum in complex 1 and minimum in complex 4. In case of complex 3 the thermal study inferred that CdS end product was obtained at $730°C, whereas in case of other complexes the thermally stable end product remained unidentified. Solid state fluorescence study shows that all the complexes are luminescent at room temperature except complex 3.
Dalton transactions (Cambridge, England : 2003), 2017
Two cadmium(ii) coordination polymers (CPs) of compositions {[Cd(H2O)4(4-BPDB)][BPDC]}n (CP1) and {[Cd(H2O)(BrIP)(BTTMB)]·4MeOH}n (CP2) have been synthesized by solvothermal methods and characterized by several analytical methods including SXRD (Single Crystal X-ray Diffraction). The structure of CP1 can be described as a 1D cationic chain, {[Cd(H2O)4(4-BPDB)](2+)}n and discrete BPDC counter anions. The structure of CP2 revealed an undulated 2D sql net comprising Cd(2+) nodes bridged by the ditopic N-donor, BTTMB and dicarboxylate BrIP involved in μ2-η(1)η(1)η(1)η(1) coordination. Supramolecular interactions in both CPs generate 3D hydrogen bonded architectures. The solid state fluorescence properties of these d(10) metal ion containing CPs have been investigated. Fluorescence emission of CP1 suspended in acetonitrile is observed to be selectively quenched by acetone (LOD = 0.15 mM) over other common laboratory solvents.
Polyhedron, 2010
Four new coordination polymers of cadmium(II) with hexamethylenetetramine (htm) have been synthesized and characterized by routine physicochemical techniques as well as by X-ray single crystal structure analysis. They are [CdBr(htm) ] n (4). Complexes 1, 2 and 3 exhibit 1D polymeric structure and complex 4 shows a 2D undulated layered arrangement, containing Cd 6 (htm) 6 hexagonal units as building block, which extended to a 3D supramolecular architecture through hydrogen bonding. Thorough thermal investigation suggest that as far as the thermal stability of Cd(II)-htm bond is concerned it attains the maximum in complex 1 and minimum in complex 4. In case of complex 3 the thermal study inferred that CdS end product was obtained at $730°C, whereas in case of other complexes the thermally stable end product remained unidentified. Solid state fluorescence study shows that all the complexes are luminescent at room temperature except complex 3.
Inorg. Chem, 2002
Three novel complexes, Cd 3 tma 2 ‚13H 2 O (1), Cd 3 tma 2 ‚dabco‚2H 2 O (2), and Cd 3 Htma 3 ‚8H 2 O (3) (tma ) trimesate), of cadmium(II)−trimesate coordination polymers are obtained from hydrothermal reaction. 1 (C 18 H 32 O 25 Cd 3 ) crystallizes in the monoclinic C2/c space group [a ) 18.985(2) Å, b ) 7.3872(6) Å, c ) 20.432(2) Å, ) 97.1660(10)°, and Z ) 4]. 2 (C 24 H 22 N 2 O 14 Cd 3 ) crystallizes in the monoclinic P2(1)/c space group [a ) 10.1323(2) Å, b ) 19.5669(5) Å, c ) 13.15880(10) Å, ) 108.9810(10)°, and Z ) 4]. 3 (C 27 H 28 O 26 Cd 3 ) belongs to the trigonal P31c space group [a ) 15.7547(3) Å, b ) 15.7547(3) Å, c ) 7.93160(10) Å, and Z ) 2]
Journal of Inorganic and Organometallic Polymers and Materials, 2011
Two novel cyano-bridged heteropolynuclear complexes, [Cd(im)4Ni(μ-CN)2(CN)2] n (1) and [Cd(mim)2Ni(μ-CN)4] n (2) (im: imidazole and mim: 2-methylimidazole), have been synthesized and characterized. In 1, the trans-directed cyanide ligands of [Ni(CN)4]2− anions link two [Cd(im)4]2+ units, whereas in 2, all the cyanide groups take part in bonding with two adjacent [Cd(mim)2]2+ units, resulting 1D and 2D coordination polymers, respectively. The coordination
Inorganica Chimica Acta, 2008
Novel cadmium coordination polymers [CdL 1.5 (NO 3) 2 ] (1), [CdL 2 (NO 3) 2 ] AE (C 6 H 6) (2), and [CdL 2 (NO 3) 2 ] AE 2(C 4 H 8 O) (3), which contain a common long 3,3 0-bipyridyl-type ligand, were prepared from Cd(NO 3) 2 AE 4H 2 O and ligand L (3-py-CH@N-(CH 3)C 6 H 3-C 6 H 3 (CH 3)-N@CH-3-py). Whereas polymer 1 was prepared by solvothermal reactions, polymers 2 and 3 were prepared by layer diffusion. All have a repeating 84-membered ring unit. Polymer 1 has a non-interpenetrated 1-D ladder structure, and polymers 2 and 3 have a 2-D brick-wall structure. In particular, polymers 2 and 3 contain guest molecules (benzene (2) or THF (3)) in their frameworks, and the desorption-resorption behavior of the guest molecules is rather reversible.