The fundamental principle of solid ultraviolet spectroscopy was described and its latest application in characterization of oil refining catalysts reviewed,including characterization of adsorption of supports and catalysts,metal surface,center of metal,pore texture,supported metal catalysts and heteropoly zeolite.

A new three dimensional open-framework vanadium phosphate, [H3N (CH2)3NH3]2[H3N(CH2)3NH2][H2N(CH2)3NH2][V(H2O)2(VO)8(OH)4(PO4)4(HPO4)4]·4H2O (DAP-V9P8), has been hydrothermaly synthesized using 1,3-diaminopropane (1,3-DAP) as structure-directing molecule and characterized by single crystal X-ray diffraction, infrared spectrum and thermogravimetric analysis.

The factors influencing the thermal stability of a vanadium phosphate (H_3NCH_2CH_2NH_2)4 [V~Ⅲ(H_2O)_2(V~ⅣO)_8(OH)_4(HPO_4)_4(PO_4)_4(H_2O)_2]·3H_2O(V_9P_8-en for short)with open-framework were investigated by XPS.

The recent development in the preparation,characterization,and crystal chemistry and thermal stability of oxo-vanadium phosphates with open framework is covered in this review.

An open framework vanadium aluminumphosphate [NH_(3)CH_(2)CH_(2)NH_(2)][(VO)Al(PO_(4))_(2)] has been prepared hydrothermally and its thermal stability characterized by XRD, TG-DTA, FT-IR and SEM.

Extensive studies have been devoted to the syntheses and characterization ofvanadium and iron phospates with open framework structures because of theirpotential usage in the field of catalysis, molecular sieves, ionic exchange and gasseparation.