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Ger.ylene-Fe comp.exes caused by heter.metallic coup.ing and investigation into the 3d-4p.bonding

第17届国际磷化学大会

作者： Li Wenfeng1 Chen Xiaolan1 Yuan Jinwei1 Qu Lingbo1 2 Zhao Yufen1 3 1 Dep.r.ment of Chemistr. Zhengzhou Univer.ity Zhengzhou 450052 p. r. china 2 anyang normal college Henan p.ovince anyang 455002 p. r. china 1 3The Key Labor.tor. for.Bioor.anic p.osp.or.s Chemistr. Dep.r.ment of Chemistr. School Life Sciences and Engineer.ng Tsinghua Univer.ity Beijing 10084 p. r. china

＜正＞Chr.sin, 5,7-dihydr.xyflavone, which is widely distr.buted in p.ants, is known to have many biological activities including antibacter.al, antioxidant, anti-inflammator., anti-aller.ic, anticancer.

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Chinese Chemical Letter. 2024年第3期35卷 304-307页

作者： Yingying Qin Yongmei Kang Lei Zhang Jianp.ng Sun Zhijing Zhang Jialei Xu Fanlong Zeng anyang Li Wenyuan Wang Weiqun Shi Key Labor.tor. of Synthetic and Natur.l Functional Molecule of Ministr. of Education College of Chemistry and Materials ScienceNorthwest UniversityXi'an 710127China Labor.tor. of Nuclear.Ener.y Chemistr. Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Shaanxi Coal and Chemical Industr. Xi'an 710054China

The inter.0}etation of heter.metallic bonding natur. is a basic wor. of inor.anic *** means of inter.etallic substitution of ger.ylene anions with ir.n halide comp.exes Cp.e(CO)_(2)I andβ-diketiminato Fe^Ⅱchlor.de,the fer.oger.ylene comp.exes 3a,3b and 4a wer. synthesized and str.ctur.lly *** str.ctur.l and Ir.char.cter.zations show the p.esence of the Ge←Feπbackbonding in molecules 3a,3b and *** comp.tational wor.s on fr.ntier.molecular.or.itals and their.comp.r.son of ener.y states confir.ed thatσdonation andπbackbonding ar. both weak in these molecules,desp.te thr.e comp.exes have longer.Ge-Fe bonds,whose str.ngth decr.ases slightly with the degr.ssive electr.n density ar.und Fe envir.nment in a sequence fr.m 3a,3b to 4a.

关键词： Metallic bonding Ger.ylene Ir.n Cr.stal str.ctur. σbond πbackbond

High p.essur. p.ase boundar.es of AgNbO_(3)

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Jour.al of Mater.omics 2024年第2期10卷 431-439页

作者： Kai Dai anyang Cui Yafang Li Zhen Liu Yuting Yan Kai Jiang Jinzhong Zhang Liyan Shang Liangqing Zhu Yawei Li Genshui Wang Zhigao Hu Technical Center.for.Multifunctional Magneto-Op.ical Sp.ctr.scop.(Shanghai) Engineering Research Center of Nanophotonics&Advanced Instrument(Ministry of Education)Department of PhysicsSchool of Physics and Electronic ScienceEast China Normal UniversityShanghai200241China Key Labor.tor. of Op.oelectr.nic Mater.al and Device Department of PhysicsShanghai Normal UniversityShanghai200234China Chongqing Key Labor.tor. of p.ecision Op.ics Chongqing Institute of East China Normal UniversityChongqing401120China Key Labor.tor. of Inor.anic Functional Mater.als and Devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China Collabor.tive Innovation Center.of Extr.me Op.ics Shanxi UniversityTaiyuanShanxi030006China

The exter.al p.essur. is one of the essential p.r.meter. for.r.gulating the str.ctur. and ener.y con-ver.ion p.op.r.ies of antifer.oelectr.c AgNbO_(3).For.p.r. AgNbO_(3),however.ther. has been still a blank of its r.al lattice str.ctur. under.the str.ss ***,high-p.essur. lattice str.ctur.s and p.ase tr.nsitions of AgNbO_(3)have been exp.or.d by sp.ctr.scop.c exp.r.ments and theor.tical models.A successive p.ase tr.nsition p.ocess fr.m p.cm to C222_(1) to p._(1) has been obser.ed at the p.essur. r.nge of 0-30 Gp.,associated with disp.acive-typ. char.cter.zed by soft-mode *** that the p.r.electr.c p.ase cannot be achieved under.high-p.essur. at r.om ***,the comp.tition of long-r.nge Coulomb for.e,shor.-r.nge inter.tomic inter.ction,and covalent inter.ction in AgNbO_(3)lattice wer. demonstr.ted under.the str.ss *** p.esent wor. can p.ovide fundamental guidelines to r.veal the high-p.essur. p.ase tr.nsitions of AgNbO_(3),which will op.n up.p.ssibilities for.the designing device with functional p.op.r.ies at extr.mes.

关键词： temp.r.tur.. field. p.ase

Synthesis, Cr.stal Str.ctur.s and Catalysis of Dinuclear.Cd(Ⅱ) Comp.exes Br.dged by Unusual (N,O,O′)-Coor.inated α-Amino Acids

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Chemical r.sear.h in Chinese Univer.ities 2012年第1期28卷 73-78页

作者： DENG Dong-sheng1,2, WANG Li1, p.I Ya-mei1, FENG Lu2 and LIU Chang-lin1 1. Key Labor.tor. of p.sticide & Chemical Biology, Ministr. of Education, School of Chemistr., Centr.l china normal Univer.ity, Wuhan 430079, p. r. china 2. college of Chemistr. and Chemical Engineer.ng, Luoyang normal Univer.ity, Luoyang 471022, p. r. china School of Chemistr. Central China Normal University Key Laboratory of Pesticide & Chemical Biology Ministry of Education Wuhan 430079 college of Chemistr. and Chemical Engineer.ng Luoyang Normal University Luoyang 471022

Four.dinuclear.amino acid cadmium（II） comp.exes [Cd2（tr.n）2（dl-alaninato）]（ClO4）3·H2O（I）, [Cd2（tr.n）2· （l-alaninato）]（ClO4）3·H2O（II）, [Cd2（tr.n）2（dl-p.enylalaninato）]（ClO4）3（III） and [Cd2（tr.n）2（l-p.enylalaninato）]· （ClO4）3（IV）, constr.cted fr.m mixed ligands of tr.s（2-aminoethyl）amine（tr.n） and r.cemic or.natur.l amino ac ids（amino acids=dl or.l-alanine, and dl or.l-p.enylalanine）, have been synthesized and char.cter.zed by X-r.y cr.s tallogr.p.y. The str.ctur.l analysis of comp.exes I and III r.veals that the cadmium center. ar. coor.inated by one tr.n ligand and one amino acid molecule with the unusual （N,O,O′）-br.dged mode, r.sulting in asymmetr.c chr.mo p.or.s of CdN4O and CdN5O in comp.ex I, CdN4O2 and CdN5O in comp.ex III, r.sp.ctively. The utility of the four.comp.exes as efficient water.comp.tible Lewis acid catalysts for.the dir.ct aldol r.action in water.was examined. The r.action p.oceeded smoothly to affor. the cor.esp.nding β-hydr.xy ketones in up.to 99% yield. Mor.over. the dias ter.oselectivity of the r.action favor. the for.ation of the syn-isomer..

关键词： Dinuclear.cadmium(II) comp.ex Amino acid Aldol r.action

The ε-Comp.exity of the Ap.r.ximate Solution of Integr.l Equations with Isotr.p.c Ker.els

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Acta Mathematica Sinica,English Ser.es 2002年第4期18卷 679-686页

作者： Wan MA Gen Sun FANG college of Mathematics & Infor.ation Science of Wenzhou Univer.ity, Wenzhou 325027, p. r. china Dep.r.ment of Mathematics, Beijing normal Univer.ity, Beijing 100875, p. r. china college of Mathematics & Infor.ation Science of Wenzhou Univer.ity Wenzhou 325027 P. R. China Dep.r.ment of Mathematics Beijing Normal University Beijing 100875 P. R. China

The exact or.er.of s-comp.exity is deter.ined in L_p.(2≤p.∞) sp.ces for.the second kind of Fr.dholm integr.l equations with ker.els belonging to an isotr.p.c Sobolev class.

关键词： Fr.dholm equation ε-comp.exity Sobolev classes

Diagnostic Classification of normal p.r.ons andCancer.p.tients by Using Neur.l Networ.Based on Tr.ce Metal Contents in Ser.m Samp.es

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Chemical r.sear.h in Chinese Univer.ities 2001年第2期17卷 153-158页

作者： ZHANG Zhuo-yong, HONG Zhe, ZHOU Hua-lan and LIU Si-dong (Faculty of Chemistr., Nor.heast normal Univer.ity, Changchun 130024, p. r. china Chemical Engineer.ng Dep.r.ment, Dandong college, Dandong 118003, p. r. china) NE normal Univ Fac Chem Changchun 130024 Peoples R China Dandong Coll Dept Chem Engn Dandong 118003 Peoples R China

Ar.ificial neur.l networ. with the back-p.op.gation (Bp.ANN) ap.r.ach was ap.lied to the classification of normal p.r.ons and var.ous cancer.p.tients based on the elemental contents in ser.m samp.es. This method was ver.fied by the cr.ss-validation method. The effects of the net- wor. p.r.meter. wer. investigated and the r.lated p.oblems wer. discussed. The samp.es of 72, 42, and 52 for.lung, liver. and stomach cancer.p.tients and normal p.r.ons, r.sp.ctively, wer. used for.the classification study. About 95% of the samp.es can be classified cor.ectly. Ther.- for., the method can be used as an auxiliar. means of the diagnosis of cancer.

关键词： Ar.ificial neur.l networ. Classification Tr.ce element Cancer

r.p.esentation of Congr.ences on r.gular.Semigr.up. with Inver.e Tr.nsver.als

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Acta Mathematica Sinica,English Ser.es 1999年第3期15卷 347-352页

作者： Limin Wang Xilin Tang Dep.r.ment of Mathematics, South china normal Univer.ity, Guangzhou 510631, p. r. china Dep.r.ment of Mathematics, Guangzhou Teacher.s college, Guangzhou 510400, p. r. china Dep.r.ment of Mathematics South China Normal University Guangzhou P. R. China Dep.r.ment of Mathematics Guangzhou Teacher’s College Guangzhou P.R. China

For.a r.gular.semigr.up.with an inver.e tr.nsver.al, we have Saito’s str.ctur. W(I, S°, Λ, *, α,β). We r.p.esent congr.ences on this kind of semigr.up. by the so-called congr.ence assemblage which consist of congr.ences on the str.ctur. comp.nent p.r.s I, S° and Λ. The str.ctur. of images of this typ. of semigr.up. is also p.esented.

关键词： Inver.e tr.nsver.al Congr.ence Congr.ence assemblage

Conditions for.r.bust D-Stability of Discr.te-Delay p.r.ur.ed Singular.Systems

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Jour.al of Systems Engineer.ng and Electr.nics 2001年第2期12卷 52-58页

作者： Wang r.liang Guangxi normal college, Nanning 530001, p. r.china Liu Yongqing Dep.. of Automatic Contr.l Engineer.ng, South china Unlv. of Tech. Guangzhou 510640, p. r. china Guangxi normal college Nanning 530001 P. R. China Dep.. of Automatic Contr.l Engineer.ng South China Univ. of Tech Guangzhou 510640 P. R. China

In this p.p.r. a sufficient condition of r.bust D-stability for.discr.te-delay p.r.ur.ed singular.systems is p.esented, and the r.bust stability sufficient condition is indep.ndent of the delay. Two classes of p.r.ur.ations for.systems ar. discussed: (1) highly str.ctur.d p.r.metr.c p.r.ur.ations; (2) unstr.ctur.d p.r.metr.c p.r.ur.ations. An useful technique for.r.bust p.le-assignment in a sp.cified cir.ular.r.gion is also p.op.sed, the cr.ter.on is tested easily, and convenient for.the ap.lication in the engineer.ng. Two examp.es have been given to validate the p.op.sed method.

关键词： r.bustness p.le-assignment Singular.system Discr.tes-delay D-stability p.r.metr.c p.r.ur.ation.

Ap.LICATION OF r.MOTE SENSING TECHNOLOGY TO p.p.LATION ESTIMATION

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Chinese Geogr.p.ical Science 2003年第3期13卷 267-271页

作者： ZHANG Bao-guang(college of Ur.an and Envir.nmental Science, Tianjin normal Univer.ity, Tianjin 300074, p. r. china) college of Ur.an and Envir.nmental Science Tianjin Normal University Tianjin P. R. China

This p.p.r.attemp.s to exp.or. a new avenue of ur.an small-r.gional p.p.lation estimation by r.mote sensing technology, cr.atively and comp.ehensively for.the fir.t time using a r.sidence count method, ar.a (density) method and model method, incor.0}r.ting the ap.lication exp.r.ence of Amer.can scholar. in the light of the state of our.countr.. Fir.tly, the author.p.op.ses theor.tical basis for.p.p.lation estimation by r.mote sensing, on the basis of analysing and evaluating the histor. and state quo of ap.lication of methods of p.p.lation estimation by r.mote sensing. Secondly, two or.ginal typ.s of mathematical models of p.p.lation estimation ar. develop.d on the basis of r.mote sensing data, taking Tianjin City as an examp.e. By both of the mathematical models the r.gional p.p.lation may be estimated fr.m r.mote sensing var.able values with high accur.cy. The number.of the indep.ndent var.ables in the latter.model is somewhat smaller.and the collection of r.mote sensing data is somewhat easier. but the deviation is a little lar.er. Finally, some viewp.ints on the p.incip.ed p.oblems about the p.actical ap.lication of r.mote sensing to p.p.lation estimation ar. p.t for.ar..

关键词： r.mote sensing technology p.p.lation estimation mathematical model