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nanoSnO2 and Cu-doped TiO2 gelatins were prepared by sol-gel method, coated onto glass substrates by spin coating method, followed by drying at low temperature and calcined at high temperature, the influence on the structure and properties made by doping amount and composite form was discussed about. The films were characterized by XRD, SEM , EDS and UV-Vis, the photocatalysis degradation efficiency was studied as well. The results showed that the SnO2/ TiO2:Cu2+films were anatase structure, the surface were flat and stable without obvious crack, average diameter was about 20 nm. EDS indicated that Cu was introduced to TiO2 stratum of the SnO2TiO2 films ; UV-Vis showed the absorbance at visible region increased comparing to pure TiO2 and mixed SnO2TiO2 system. The degradation experiment under UV light showed degradation efficiency of SnO2/ TiO2: Cu2+films was higher compared with the mixed structure films, When the doping amount of Cu increased to 10% (mole fraction), the photocatalysis degradation efficiency reached its maximum.

By using sol-gel method, Nb/SnO2 gel was prepared,and spin coating method was used to coat on glass substrates, which dried and calcined to obtain a homogeneous Nb / SnO2 composite films.Under the same experimental conditions, the different doping amount of nickel, calcination temperature on the structure and morphology of Nb/SnO2 film were discussed. By using XRD, IR, SEM and other testing methods, the structure and morphology of Nb / SnO2 composite film were characterized.At 500 °C, the film particle had high crystallization and small size,and the surface of the film was well-distributed.Its optical and electrical properties were tested by the ultraviolet-visible spectrophotometer and four-probe resistivity meter.UV-Vis spectra showed that Nb / SnO2 film absorbance in the near ultraviolet region had increased significantly, but the absorbance showed a downward trend with the increasing amount of Nb5+ doped;Conductivity analysis showed: Nb5+ doping amount of 8% (the amount of material), the conductivity of Nb/SnO2 composite films was best.

Nanometer chitosan (nmCS) was obtained by ion exchange methodology, and the nanometer CS-Ag、CS-Ca and CS-Ag-Ca were prepared by introducing AgNO3 and saturated CaCl2 solution into the product obtained above. The structures of samples were characterized by IR, XRD, SEM etc. The properties of cruor and hemostasis were studied by biological experiment. The results showed that the characteristic absorption peaks at 1647 cm-1 and 1560 cm-1 in the IR spectra of modified chitosan were assigned to nanometer chitosan sodium salt. The XRD spectra showed the characteristics of crystal shape of Ag+ and Ca2+. The SEM showed that nanometer chitosan had a part of precipitate of Ag+ and the composite effect of nanometer CS-Ca was better. The properties of cruor and hemostasis of CS-Ag-Ca were superior to CS-Ag and CS-Ca, while the CS-Ag and CS-Ca were also had an advantage over CS.

In this paper,under alkaline conditions,with chloroacetic acid to modify chitosan,obtained carboxymethyl chitosan. At pH

In this paper,using water extraction acid sinking method to extract the active components of scutellaria baicalensis.Taking a certain amount of scutellaria baicalensis powder, adding water to boil, adding hydrochloric acid to the filtrate,through a series of steps,the effective components of scutellaria baicalensis could be obtained. Through infrared spectrum and mass spectrum analysis means,it was known that the effective components was baicalin.By using the grinding method, the chitosan and baicalin were mixed to prepare the mixture.Through the cutting of mice tail hemostasia test , the performance of the product was studied.The results showed that the performance of the mixture of chitosan and baicalin was better than that of chitosan,while chitosan and baicalin optimum ratio was 1: 0.8.

Carboxymethyl chitosan (CAS) was obtained by carboxymethylation of chitosan (CS).The Ag+-CAS,TiO2-CAS and Ag+-TiO2-CAS were prepared by introducing AgNO3 and nanometre TiO2 solution into the product obtained the previous step. The structures of samples were characterized by IR, XRD, SEM etc. The properties of cruor and hemostasis were studied by biological experiment. The results showed that there were characteristic absorption peaks of carboxymethyl chitosan sodium salt around 3423cm-1 and 1380cm-1 in the IR spectra of modified carboxymethyl chitosan. The XRD showed it was metals Crystalline. The average diameter of CAS was about 14.8nm, the Ag+ was 143.5nm, nanometre TiO2 was 267.2nm and all of them were homodisperse. The properties of crour and hemostasis of Ag+-TiO2-CAS were superior to Ag+-CAS and TiO2-CAS, while the Ag+-CAS and TiO2-CAS were also have an advantage over CAS.

Through an alkylation reaction under alkaline conditions, isobutyl was introduced to chitosan to form isobutyl-chitosan. Isobutyl-chitosan-Ca (II) complex was synthesized at pH 6.0 by a reaction of isobutyl-chitosan and calcium chloride. The structure of isobutyl-chitosan-Ca (II) complexes was characterized by ultraviolet-visible diffuse reflectance spectrum (UV-Vis) and FT-IR spectrum, and the content of calcium was measured by inductively coupled plasma-optical emission spectrometry (ICP-OES). The FT-IR spectra of isobutyl-chitosan and chitosan showed that structure of isobutyl-chitosan-Ca (II) complexes was obviously different with isobutyl-chitosan. Results of UV spectra showed that the maximum absorption of isobutyl-chitosan and isobutyl-chitosan-Ca (II) were at 310 nm and 324 nm, respectively. The content of calcium was 1.6026%, measured by ICP-OES.

Nitrogen-doped nanoTiO2sol was prepared by sol-gel method. The obtained sol was coated onto glass substrates by spin coating method, followed by drying at low temperature and calcined at high temperature. The films were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and ultraviolet-visible spectra (UV-Vis) . The XRD spectra showed that the crystal type of N-doped TiO2films was anatase. The SEM images showed that the surface of films were flat without obvious crack and average diameter was about 20 nm. The UV-Vis spectra showed that the absorbance of N-doped TiO2films at ultraviolet region increased. N-doping caused photocatalysis response wavelength to turn longer. The photocatalytic activity of N-doped TiO2films was researched through the degradation experiment of methyl orange under ultraviolet light. Higher photocatalytic degradation efficiency was exhibited compared to the pure TiO2films.

In the homogeneous system, the low molecular weight Chitosan is obtained by H2O2 oxidation degradation method. Acetyl Sulface reacted by the mixture of Acetic Anhydride and Concentrated Sulfuric Acid at equal proportion is the reagent. low molecular weight Chitosan being as raw materials, Vulcanized Oligomer Chitosan is sulfonated with good water-solubility and high sulfur content under certain conditions. It has been tested for the influence of the usage of sulfonated reagent, reaction temperature and reaction time on Sulfer content. The best condition for preparation Vulcanized Oligomer Chitosan is 5ml of Acetyl Sulface with the reaction temperature of 25°C and time of 5 Hours. It’s a new potential heparin with around 100 nm particale size tested by spectral analysis and SEM measurements, which could be a new reagent in other fields.

Two novel Tb(III) ternary complexes with 2-aniline carbonyl benzoic acid (HAB) as the first ligand, imidazo [5,6-f] phenanthroline(IP) and 1,10-phenanthroline(phen)as the secondary ligands were synthesized. The structures of the ligands and Tb(III) complexes were confirmed by elemental analysis, IR spectra and UV spectra. The fluorescence spectra suggested that the luminescence intensity of Tb(HAB)3IP was obviously higher. Further investigation showed that HAB was the donor of energy, IP and phen which functioned as “energy ladder” could transfer the energy in the system of ternary complexes. If this “energy ladder” was located suitable, it could bridge the energy level difference between the triplet state of first ligand and excited states of rare earth ion .So, the intramolecular energy could transfer efficiently to central Tb3+ ion and competitive luminescence of HAB was also reduced.

Assembly system with MCM-41 as a host and TAP (Tb(aspirin)3phen) as an active optical guest was synthesized at room temperature, and the interrelated products of MCM-41 and TAP systems were examined for comparison. The structures and the physical properties of the samples were characterized by a combination of techniques, such as XRD and N2 adsorption–desorption. Excitation and emission spectra were carried out to explore the photoluminescence (PL) properties of the samples and the relationships between the optical guest and the inorganic host. The results from these characterizations showed that the TAP is incorporated into the channels of MCM-41 and can increase the framework order of MCM-41. The reduction in the specific surface area of TAPMA (Tb(aspirin)3phen-MCM-41A) compared with that of MA (MCM-41A) imply that the TAP is confined inside the channels of MA. Based on the analyses of the excitation spectra, we suggested that the surface environment of MCM-41 affects the energy absorption of the organi...

A novel beta-diketone 1-(4-aminophenyl)-4,4,4-trifluorobutane-1, 3-dione(p-NBFA) was synthesized by Classical claisen condensation reaction. With p-NBFA as the first ligand and 1,10-phenanthroline(phen) as the secondary ligand, two new rare earth Eu(III), Tb(III) ternary complexes were prepared. Elemental analysis demonstrated that the compositions of the complexes were Eu(p-NBFA)3 phen and Tb(p-NBFA)3 phen. IR spectra indicated that rare earth ions were coordinated with oxygen atoms of the first ligand and two nitrogen atoms of the secondary ligand. UV spectra showed that the main absorption was from the first ligand in the complexes, the secondary ligand was acted as the synergistic coordination. Fluorescence spectra demonstrated that the emission intensity of Eu(p-NBFA)3 phen was obviously stronger than that of Tb(p-NBFA)3 phen. Further investigation showed that the emission intensity was influenced by the matching situation of energy level between the triplet state of ligand and the emission energy of rare earth ion. In Tb(p-NBFA)3phen, due to that the triplet state energy level of p-NBFA was too near to the energy level of 5D4, then the energy transfered back to the ligand, most of the excitation energy was consumed, so the terbium complex showed lower luminescence intensity and competitive luminescence of p-NBFA also appeared. In Eu(p-NB-FA)3phen, the energy level difference was well matched and the emission of europium complex was characteristic and high.

The novel beta-diketone 1-(4-bromophenyl)-3-phenylpropane-1, 3-dione (L) was synthesized at room temperature by classical Claisen condensation reaction. With the beta-diketone L as the first ligand and phen as the secondary ligand, and a new rare-earth Eu (III) ternary complex was prepared. The ligand L and ternary complex were characterized by elemental analysis, IR spectra, UV spectra and fluorescence spectra. IR spectra indicated that: the novel ligand L contained the structure of beta-diketone, where the content of enol was high; the Eu3+ ion in the ternary complex was coordinated with six oxygen atoms of three L ligands and two nitrogen atoms of the second ligand phen. UV spectra showed that the main absorption was from the first ligand L in the Eu (III) ternary complex. The excitation and emission spectra of the ternary complex were measured and investigated. Fluorescence spectra demonstrated that the ternary complex could emit characteristic fluorescence of rare earth Eu3+ ion and the strongest emission band was narrow which was attributed to the 5 D0 --7 F2 transitions of the 4f electrons of the central Eu3+ ions. So, the new Eu(III) ternary complex is an excellent red-emitter which would be regarded as a valuable material with bright red fluorescence because it presents good monochromaticity.

In the present paper, imidazo[5,6-f] phenanthroline(IP), 2-aniline carbonyl benzoic acid (HAB) and 2-diphenylamine carbonyl benzoic acid (HDPAB) were synthesized at room temperature. Under the same condition, with HAB and HDPAB as the first ligand and IP as the secondary ligand, two novel ternary organic terbium complexes were prepared in ethanol solution. Elemental analysis demonstrated that the chemical formula of the two ternary complexes were Tb(HAB)3IP and Tb(HDPAB)3IP. The spectroscopic properties of the ligands and complexes were also discussed. IR spectra indicated that rare earth Tb3+ ion was coordinated with oxygen atoms of the first ligand HAB and HDPAB and two nitrogen atoms of the secondary ligand IP. The UV spectra showed that the main absorption was from the first ligand in the ternary complexes, the secondary ligand was bonded to rare earth Tb3+ ion and the energy transfer efficiency of HAB was higher than that of HDPAB. The excitation and emission spectra of the two terbium complexes were measured and investigated, especially by comparing their fluorescence intensities. Fluorescence spectra demonstrated that the two kinds of ternary organic terbium complexes could emit characteristic fluorescence of rare earth Tb3+ ion. But the fluorescence intensity of Tb(HAB) IP was obviously higher than that of Tb(HDPAB)3 IP. Compared with two first ligands HDPAB and HAB, the fluorescence intensities of the two ternary organic terbium complexes were found to be influenced by the molecule structure, and the benzene ring which was coordinated with nitrogen atom increased in HDPAB. In the system of ternary complexes, due to the different coordinated number of benzene ring, the mobility of electron and the distribution of electron cloud were changed. The variation affected the transition of the pi electrons, which can take in the energy in ternary complexes. So, the energy transfer efficiency from the first ligand to rare earth Tb3+ ion decreased and Antenna effect achieved inefficiency in Tb(HDPAB)3IP.

Assembly system with MCM-41 doped with Yb3+ as a host, and Tb(aspirin) 3phen, which had been heat treated, as an active optical guest, was synthesized at room temperature. The structure and physical properties of the composites were characterized by a combination of different techniques such as XRD, N2 adsorption-desorption and IR, while the photoluminescence properties of the composites were analyzed by PL. Excitation and emission spectra were examined to explore the PL properties of the prepared samples and the relationship between the optical guest and the inorganic host. The present paper reports a new synthesis method called "Direct-Calcination" to avoid the loss of rare earth ions in the process of synthesis. Strong reflections at 2theta = 2.6 attributed to (100) reflection were presented in XRD patterns of both Yb/MCM-41 and Tb(aspirin) 3phen-Yb/MCM-41, which always can be observed for regular, spherical structure of MCM-41 materials, and the inorganic framework order increased after Tb(aspirin) 3phen being incorporated into the channels of Yb/MCM-41. The intensity of the band at 963 cm(-1) decreased in IR spectrum of Yb/MCM-41, relative to that in IR spectrum of MCM-41, implying that Yb3+ had been banded with the framwork. And a sharp band at 1 384 cm(-1) in IR spectrum of Tb(aspirin) 3phen-Yb/MCM-41 also gives the characteristic information about the bands in Tb(aspirin) 3phen-MCM-41. The results from the characterization of PL show that the wide excitation band over 240-375 nm of Tb(aspirin) 3phen is assigned to the carbonyl group n --pi* transition absorption, benzene ring pi --pi* transition absorption of aspirin, and phenanthrene absorption of phen. The luminescence intensity of Tb(aspirin) 3phen incorporated into the channels of MCM-41 can be enhanced by heat treating in the synthesis process of Tb(aspirin) 3phen, while the intensity also can further increases by doping Yb3+ in the silicon framework of MCM-41. The luminescence intensity of the assembly system gets to maximum when Yb/Si ratio is 7.579 x 10(-3).

Highly ordered mesoporous material MCM-41A(after calcination) and MCM-41B (before calcination) were synthesized in ethylenediamine (EDA) medium at room temperature, and the rare earth complexes Tb(aspirin)3phen which had been heat treated as an active optical guest was incorporated into the one-dimensional channels of MCM-41A(B). The photoluminescence properties of the organic/inorganic composites Tb(aspirin)3phen-MCM-41A(B) were investigated based on the analyses of excitation and emission spectra to provide information about the relationship between the organic host and the inorganic optical guest. The results from the characterization of PL show that the wide excitation band in the range of 240-375 nm of Tb(aspirin)3 phen is assigned to the carbonyl group n --pi* transition absorption, benzene ring pi --pi* transition absorption of aspirin, and phenanthrene absorption of phen. As no excitation band appears in ultraviolet ranges, the characteristic emission peaks of Tb3+ in the emission spectra are related to antenna effect Relative to the excitation band of Tb(aspirin)3phen, the excitation band of Tb(aspirin)3phen-MCM-41B and Tb(aspirin)3phen/MCM-41A splits obviously, and only one narrow excitation peak at 353 nm appears in the excitation spectrum of Tb(aspirin)3 phen-MCM-41A. The excitation bands of Tb(aspirin)3 phen-MCM-41B and Tb (aspirin)3 phen/MCM-41A at short wavelength weakens and disappears gradually, while excitation peaks at long wavelengths is enhanced gradually, and the IL/ILn ratio I, where IL is the emission intensity at 405 nm under 335 nm excitation, and I(Ln) is the emission intensity at 544 nm under 335 nm excitation, also decreases correspondingly. It is suggested that the triplet states and single states of aspirin and phen reduce with different degree after Tb(aspirin)3phen is banded with MCM-41 framework, and the effect of silicon framework on the states of phen is more than that of aspirin. The degree of the effect on the states of organic ligands is in the order of: MCM-41B external surfaceMCM-41A external surfaceMCM-41A inside surface. In addition, the ratio I also could indicates the degree of the effect of MCM-41 surface lattice field on the ligand energy level and the content of Tb (aspirin)3phen on the MCM-41 surface.

The new double-cubane cluster compound [NEt4]3[Mo2Fe6S8(µ-OMe)3(SPh)3Cl3] is synthesized from (NH4)2MoS4, FeCl3, Fe powder, S powder, NaSPh and NEt4Br in MeOH–DMF, its crystal structure is determined by X-ray crystallography, and results of XPS indicate a valence state of +4 for Mo.