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Three Cd(II)-based coordination polymers (CPs) with unique structures and topologies, namely, [Cd2(L)2(bimb)2(H2O)2]n (1), {[Cd(L)(bmib)0.5(H2O)](CH3OH)0.5}n (2) and [Cd(L)(beib)0.5(H2O)]n (3) (H2L = methyl-3-hydroxy-5-carboxy-2-thiophenecarboxylate, bimb = 1,4-bis(imidazol-1′-yl)butane, bmib = 1,4-bis(2-methylimidazolyl)butane and beib = 1,4-bis(2-ethylimidazolyl)butane) have been successfully constructed and characterized by single crystal X-ray structure determination, IR spectra, elemental analyses and powder X-ray diffractions. X-ray results showed compound 1 features a new 2-nodal 5,6-connected 3D network with a point symbol of {45.5.63.7}2{42.54.69}. Compound 2 exhibits a rare 6-fold interpenetrating dia 3D network. Compound 3 bears a hydrogen bonded-extended 3D supramolecular structure based upon sql layers assembled from dinuclear Cd(II) units. Thermal stability and solid photoluminescence properties of compounds 1–3 were studied. Significantly, compound 1 can sense nitrobenzene through the luminescence quenching effect.

Two new Sulfur-containing Cadmium(II) coordination polymers {[Cd(HL)2](2H2O)}n (1) and {[Cd(L)(bmie)(H2O)](H2O)}n (2) (H2L = methyl-3-hydroxy-5-carboxy-2-thiophenecarboxylate, and bmie = 1,2-bis(imidazol-1′-yl)ethane) have been successfully constructed and structurally characterized by the single-crystal X-ray diffraction and other characterization techniques, such as elemental analysis, IR spectroscopy and thermogravimetric analysis. Structural analyses reveal that complex 1 exhibits a hydrogen bonded-extended 3D supramolecular structure based upon 4-connected sql layers assembled from single Cd(II) centers as nodes. Complex 2 features a 3D network which can be rationalized as a rare 4-connected cdl topology. It is shown that the H2L ligand is a suitable building block in constructing coordination polymers with structural diversities. Moreover, solid photoluminescent properties have been investigated.

In the study potassium titanate whiskers (PTW, K2Ti6O13) coated with nanometer calcium carbonate (C-PTW) were firstly prepared by adding carbon dioxide into the solution of calcium chloride and PTW; then coupling agent KH550 was used to modify the surface of C-PTW. The surface properties of the modified PTW were characterized by methods of SEM, EDS, XRD, FTIR spectroscopy, UV-Vis absorption spectra, and surface contact angle measurement. The results indicated that the appropriate coating ratio of CaCO3 to PTW was 0.07: 1, and that the ideal ratio of KH550 to C-PTW was 0.035: 1 by maximum settlement time. The surface of the modified C-PTW (K-C-PTW) showed excellent lipotropic properties and mobility because the surface of PTW coated by calcium carbonate possessed more hydroxyl groups than that of PTW, so the reaction between C-PTW and KH550 proceeded easier. It could be expected that the simple method may contribute to solve the problem of agglomeration for PTW in the application of composite material.