A new compound,[Co(dien)2](dienH3)(H3O)7[P2Mo5O23]2·14H2O, has been hydrothermallly synthesized by using Na2MoO4,CoCl2, H3PO4 and dien, and structurally characterized by elemental analysis, X-ray powder diffraction analysis, SEM, IR and TG analysis. The results show that the compound is composed of a polyanion [P2Mo5O23]212- , complex [Co(dien)2]2+ cation, protonated [dienH3]3+ , and forteen crystallization water molecule.
Two new photochromic inorganic-organic hybrid materials formed from Keggin-type polyoxometalates(POMs)and metronidazole(C 6 H 9 N 3 O 3 ,MNZ),formulated as H 3 PMo 12 O 40 ·3MNZ·3H 2 O (1)and H 3 PW 12 O 40 ·3MNZ·3H 2 O(2),were synthesized and characterized by elemental analysis,IR spectra, electronic spectra,electron spin resonance(ESR)spectra and thermogravi-metry-differential thermal analysis (TG-DTA).Reflectance spectra show the presence of weak intermolecular charge transfer between the organic and inorganic moieties in the solid state.The photochromic properties were studied by solid diffuse reflectance spectra and ESR spectra,and the photochromic reactions were found to exhibit first-order kinetics.TG-DTA showed that two hybrid materials have similar thermal behavior.
The compound of diphosphopentamolybdate{[Cu(en)(Hen)] 2 [P 2 Mo 5 O 23 ]}?3H 2 O [en=ethylenediamine]had been obtained from the hydrothermal method and characterized by single crystal X-ray diffraction,elemental analysis,FT-IR,and thermogravimetric analysis.The structure consist of[P 2 Mo 5 O 23 ]6- clusters anions,complex[Cu(en)(Hen)]3+cations and crystallization water molecules,which are held together to a two-dimensional framework.The most interesting feature of the compound is that two nitrogen atoms are both coordinated with Cu(Ⅱ)in one ethylenediamine molecule,for the other ethylenediamine molecule,only one nitrogen atom is towards Cu(Ⅱ)and the other nitrogen atom is protonated and formed Hen+.
LB film of new hybrid Polyquinolin/Trilacunary heteropolytungstoilicate (PQ/SiW9) was prepared and characterized by π-A isotherm, UV-Vis absorption spectroscopy, atomic force microscope(AFM), fluorescence spectroscopy. The results indicated that they had good film-forming property on the air-water interface. The molecular areas for these monolayers at zero pressure were estimated to be 7.2 nm2·mol-1. The collapse pressure of LB film was 46 mN·m-1. Their I^V curves results showed that the title LB films had good electric conductivity and the conductivity of the LB film increased with monolayers number.
