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Fluorescence determination of platinum with dibromohydroxyphenyl-fluorone in microemulsion after separation and enrichment by sulfhydryl dextrose gel

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Rare Metals 2008年第1期27卷 101-105页

作者： LI Huizhi ZHAI Yubo ZHAI Diantang school of chemistry and chemical engineering Jinan University Jinan 250022 China school of Life Science Nanjing University Nanjing 210093 China

A new fluorescence quenching method has been developed for the determination of platinum in nonionic microemulsion *** method is based on the fact that platinum can form a stable chelate with dibromohydroxyphenyl-fluorine（DBHPF） when they are in the molar ratio of 1：2 in the nonionic microemulsion *** optimum conditions,the system,having the maximum excitation and emission wavelengths at 468 nm and 532 nm,respectively,shows constant fluorescence intensity in the pH range of 3.5-4.0 and high selectivity and sensitivity as well as low interference from foreign ***,this fluorescence intensity is a linear function of Pt（IV） concentration in the range of 0.002-1.00 μg·mL^-1 and the limit of detection is 2.90 ng·mL^-1.

关键词： analytical chemistry separation and enrichment fluorescence determination microemulsion platinum(IV)

Synthesis and Properties of the Polymeric Surfactant Based on Maleamic Acid and Styrene

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Journal of Wuhan university of Technology(Materials Science) 2011年第1期26卷 79-82页

作者：杨永清 Department of Applied chemistry School of Science Northwestern Polytechnical University

An alternative polymeric surfactant P（M3/St） was synthesized by solution polymerization of maleamic acid as hydrophilic monomer and styrene as hydrophobic monomer. Some factors that affect the yield and properties of the polymeric surfactant were investigated systemically. The surface tension of the polymeric surfactant reaches 37-38 mN/m. It is proved that the polymeric surfactant shows very good surface activity and emulsifying ability. The TG analysis shows that the temperature of the thermal degradation can reach 314.4 ℃. It will be used as a new type of polymeric surfactant.

关键词： maleamic acid polymeric surfactant surface activity emulsifying ability thermal resistance

Total synthesis of lespedezavirgatol

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Science china chemistry 2010年第12期53卷 2547-2550页

作者： QI JinPing 1,DENG HongZhu 2 & CAO DeRong 1 1 school of chemistry and chemical engineering,South china university of Technology,Guangzhou 510640,china 2.school of Traditional Chinese Medicine,Southern Medical university,Guangzhou 510515,china 1. school of chemistry and chemical engineering South China University of Technology Guangzhou 510640 China2. School of Traditional Chinese Medicine Southern Medical University Guangzhou 510515 China

Lespedezavirgatol,a novel 2-phenylbenzofuran compound which was isolated from Lespedeza virgata,was firstly synthesized from pyrogallic acid and 3,4-dimethoxyphenol as starting materials with 8 *** key steps for the total synthesis were the selective iodination at 3-position of 1,2-dimethoxy-4-methoxymethoxybenzene and the Sonogashira cross-coupling reaction between 4-iodo-2-methoxybenzene-1,3-diol and 2-ethynyl-3,4-dimethoxy-1-(methoxy-methoxy)-benzene.

关键词： 2-phenylbenzofuran lespedezavirgatol Sonogashira cross-coupling reaction

Synthesis，Crystal　Structure　and　Thermode－composition　Kinetics　of　Copper（Ⅱ）　Complex　with　bis－（Schiffbase）　Derived　from　3－Methoxysalicylaldehyde　and　Ethanolamine

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chemical Research in Chinese Universities 1994年第4期10卷 273-279页

作者： LI Shu-lan WANG Hong LIU De-xin and MENG Fan-qin(Departnient of chemistry, shandong university, jinan, 250100)YANG Zhao-he(National Laboratory of Ciystal Materials, shandong university,jinan, 250100 )(

he present paper covers the synthesis,crystal structure and thermodecom-position kinetics of bis [(3-methoxysalicylal )-ethanolamine] copper (Ⅱ) complex.X-ray diffraction determination gave the following crystal data: triclinic *** group P1,Z=2.a = 0. 884 1 ( 4 ) .b =1.0773 (2), c = 1 . 1 32 1 (3) nm . α=70. 38(1),β= 70.70(2).γ=78.29 ( 2)°.The final agreement factors were R =0. 075, R_w= 0. 067, *** on non-isothermal kinetics of thecomplex favored second order kinetics. The kinetic equation is expressed as: da/dt= A × e ￣(-E/RT)×(1 -α)￣2 .

关键词： Synthesis Crystal structure.Thermodecomposition kinetics

A contribution to the study of the modified Marschalk reaction:Hydroxymethylation of 6,8-O-dimethyl emodin

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Chinese chemical Letters 2010年第5期21卷 568-571页

作者： Hai Shan Jin,Li Ming Zhao school of chemistry and chemical engineering,Xuzhou Normal university,Xuzhou 221116,china [a] school of chemistry chemical engineering Xuzhou Normal University Xuzhou 221116 China

Hydroxymethylation of 6,8-O-dimethyl emodin was easily achieved in good yields by the modified Marschalk *** influence of the amount of solvent,base and formaldehyde toward the hydroxymethylation was *** results showed that a relatively dilute reaction solution facilitated the generation of the desired 2-hydromethyl product,while the thick reaction solution benefited the generation of the methylated quinizarins.

关键词： Marschalk reaction Hydroxymethylation Emodin Antitumor activity

Theoretical Studies on Electronic Spectra and Second-order Nonlinear Optical Properties of N-methyl-2-（2′-thiophene）-pyrrolo[3,4]C60

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Chinese chemical Letters 2001年第8期12卷 719-722页

作者： Ying LIU1, Yong Jun LIU2*, Cheng Bu LIU2 1Department of chemistry, Qufu Normal university, Qufu 273165 2Institute of Theoretical chemistry, shandong university, jinan 250100 Qufu Normal Univ Dept Chem Qufu 273165 Peoples R China shandong Univ Inst Theoret Chem Jinan 250100 Peoples R China

By using AM1 method, the structures and electronic properties of N-methyl-2-(2(-thiophene)-pyrrolo[3,4]C60 (MTPC) and N-methyl-pyrrolo[3,4]C60 (MPC) have been studied. Based on the AM1 geometry optimizing, the electronic spectra and second-order nonlinear optical polarizabilities (() of MTPC and MPC were calculated by using INDO/SCI method combined with Sum-Over-States (SOS) expression.

关键词： C60 derivatives electronic spectra and second-order nonlinear optical properties.

Development of Multi-Wavelength Spectral-Correction Method

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Chinese chemical Letters 2000年第10期11卷 893-894页

作者： Hong Wen GAO (school of chemistry and chemical engineering, Anhui university, Hefei 230039) Anhui Univ Sch Chem & Chem Engn Hefei 230039 Peoples R China

This investigation developed a new method for determining metal complex's property containing the stepwise real absorptivity(epsilon) and stability constant (K-m). The correction equation of the multi-wavelength spectral absorption was established for the simultaneous determination of various complexes to give high accuracy for trace analysis. This method was more acceptable in theory and simpler in operation than the classical methods.

关键词： simultaneous determination multi-wavelength spectral-correction complex property

Theoretical Study on the Structure and Vibrational Spectra for 4-methyl-3-penten-2-one

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Chinese chemical Letters 1999年第10期10卷 835-838页

作者： Dong Mei DU Ai Ping FU Zheng Yu ZHOU (Department of chemistry. Qufu Normal university, shandong, Qufu 273165 2 State Key Laboratory of Crystal Materials. shandong university, shandong, jinan 250100) Qufu Normal Univ Dept Chem Shandong 273165 Qufu Peoples R China shandong Univ State Key Lab Crystal Mat Jinan 250100 Peoples R China

Density functional theory BLYP (using Becke's and Lee-Yang-Parr's correlation functionals), nb initio Hartree-Fock (HF) and hybrid DFT/HF B3LYP calculations were carried out to study the structure and vibrational spectra of 4-methyl-3-penten-2-one. The BLYP/6-31G* and scaled HF/6-31G* frequencies correspond well with each other and with available experimental assignment of the functional vibrational modes.

关键词： density functional theory vibrational spectra 4-methyl-3-penten-2-one

Coupling between Two NO Radicals Linked through Electron-Rich Rings

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Chinese chemical Letters 2000年第2期11卷 123-126页

作者： Hai Quan HU1 Xian ZHAO2 Da Cheng FENG1 Cheng Bu LIU1 (1Institute of Theoretical chemistry. shandong university. jinan 250100 2Institute of Crystal Materials, shandong university. jinan 250100) shandong Univ Inst Theoret Chem Jinan 250100 Peoples R China shandong Univ Inst Crystal Mat Jinan 250100 Peoples R China

The characters of coupling between two doublet NO radicals linked through electron-rich rings have been studied. The results demonstrate that the molecules have triplet ground states, and ferromagnetic coupling exists... 详细信息

关键词： electron-rich ring ferromagnetic coupling NO radical