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1.
1 INTRODUCTIONResearchonSHGeffecthasbeenonaremarkablepositioninorganicnonlinearoptical(NLO)materialsfield.Theconjugateddelocalizedπelectronspossiblyresultinthesecond-orderNLOpropertyoforganiccompounds,soanumberofnitroanilinederivatives,suchas2-methyl…  相似文献   

2.
1 INTRODUCTIONAs a useful nonlinear optical material, the molecule must have a large second-order hyperpolarizability (β), and also must crystallize in a non-centrosymmetric structure to have a large ((2). Organic conjugated molecules with electronic donors and acceptors possibly have quite strong second-order NLO property. However, only a small percentage of the molecules with large β crystal-lize in useful non-centrosymmetric crystals. Marder and his co-worker carried out a simple an…  相似文献   

3.
1INTRoDUCTIONAlotofresultsoncobaltcomplexstructureshavebeenreportedforseveraldecades.Theinterestofresearchinthisfieldhasneverbeenreducedbecausethecobaltcomplexesplayaveryimportantroleinthelifescienceandcatalysis,etc[1-6).WereportherethesynthesisandstructureofcomplexCo(C,NO,H'),.H,O.2EXPERIMENTALAllreagentsandsolventsusedareofARgradefromcommericalsourceswithoutfurtherpurification.ThetitlecompoundCo(C,NO,H,),.H,Owassynthesizedbythefollowingmethod.When2.4g(ca.1mmol)ofCoCl2.6H2Ow…  相似文献   

4.
1INTRoDUCTIONFollowingpublicationofthefirstsynthesisofamononuclearisothiazoleinl956(li,thisringsystemhasattractedconsiderableinterest.Especially,thistenden-....1cyisincreasingsincealotOfreportsaboutexcellentbiologicalactivitiesofcompoundscontainingisothiazolemoietyemergerecently"~".Theincreasingunderstandingofthefundamentalchemistryoftheisothiazolesystemhasenabledchemiststoincorpo-ratetheringintoawidevarietyofcompoundswithpotentialbiologicalactivity.Inanattempttolookforbiologicallyactivec…  相似文献   

5.
A new copper(II) complex [Cu2(DMF)(H2O)(C7H4NO4)2(C7H3NO4)]2·3.5DMF has been synthesized and its structure was determined by single-crystal X-ray diffraction.The crystal is of triclinic,space group P1 with a = 10.722(3),b = 18.170(4),c = 20.923(7),α = 105.297(9),β = 101.701(10),γ = 105.74(1)°,V = 3615(1) 3,Z = 2,C58.50H64.50Cu4N11.50O31.50,Mr = 1686.90,Dc = 1.550 g/cm3,μ = 1.255 mm-1,F(000) = 1728.00,T = 150(2) K,the final R = 0.0640 and wR = 0.173 for 11310 observed reflections with I > 2σ(I).In the crystal,each formular unit consists of two dinuclear copper(II) compounds,between which the O-H···O hydrogen bonds exist.Each CuII cation is six-coordinated in an octahedral geometry.The intermolecular hydrogen-bonding interaction leads to a 3-D framework of the title compound.  相似文献   

6.
CrystalStructureof[Cu(C_(21)H_(25)N_2O_4)(H_2O)_2]·NO_3·2H_2OWuJie-Ying;XieFu-Xin;TianYu-Peng;ChenYao;NiShi-Sheng;DuShao-Wu;WuXin...  相似文献   

7.
1 INTRODUCTION The open-framework inorganic materials have been synthesized before the early 1980s[1]. Parti- cularly, metal phosphates have been investigated widely during the past few years[2, 3]. In recent years, considerable efforts have been devote…  相似文献   

8.
1 INTRODUCTION Norfloxacin (0.16 g, 5 mmol) and PdCl2 (0.02 g) in methanol solution. The brown solution was filtered Norfloxacin (H-Norf = 1-ethyl-6-fluoro-1,4-dihy- and the filtrate was stood undisturbed. Single crys- dro-4-oxo-7-(1-piperazinyl)-3-quinoline carboxylic tals suitable for X-ray analysis were obtained by slow- acid), a quinolone type compound, is widely used as ly evaporating the methanol solvent at 20 ℃. an antibacterial drug which targets the bacterial type 2. 2 TGA an…  相似文献   

9.
1 INTRODUCTION The self-assembly of organic-inorganic hybrid ma- terials is an intriguing area, which is yielding new generations of supramolecular architectures[1, 2]. Coor- dination by transition metals with multifunctional ligands is one of the main design principles. As a rigid multi-dentate ligand, 5-aminoisophthalic acid (AIP) has received considerable attention owing to the variety of bridging abilities[3~8]. It can engage in three types of intermolecular interactions: (1) M-L b…  相似文献   

10.
1INTRODUCTION The construction of metal-organic coordination polymers based on covalent interactions[1]or supra-molecular contacts such as hydrogen-bonding and/orπ-πinteractions)[2]is now of great interest not only due to the enormous variety of intriguing structural topologies themselves,but also to their unexpected physical and chemical properties for potential prac-tical applications as functional materials.Many N-containing ligands,such as4,4?-bipyridine,2,2?-bi-pyridine and1,10-phen…  相似文献   

11.
1 INTRODUCTION The manganese(II) ion is a biologically essential element. Knowledge of its importance is increasing as more and more enzymes are found to contain manganese ions at the active center[1, 2]. The X-ray crystallographic structures of a consi…  相似文献   

12.
1 INTRODUCTION The researches on transition metal coordination complexes have been rapidly expanded because of their fascinating structural diversity and potential applications[1~4]. As we know, zirconium oxalates can be used as precursors in the synth…  相似文献   

13.
1 INTRODUCTIONCoordination compounds with 1 ,2 ,4 triazole as a ligand have interesting fea tures,notonly because ofthe very interesting magnetic propertiesofthese complex es,but also because ofrich modes ofcoordination〔1〕.Particularly,the coordinationbehavioroftriazoletowardsa numberoftransition metalthiocyanatesshowsremark abledifferences〔2 - 6〕.On unsubstitution at N4 ,thetriazole ring hasmonodentate,1 ,2 and 2 ,4 bridging forms.These three modes were all observed in the Ni( II)…  相似文献   

14.
IntroductionMolecularpolymerwithonedimensionalormultidimen sionalstructureassemblingthroughhydrogenbondsisanim portantresearchcontentinthesupramolecularchemistryandcrystalenginnering .1,2 Withthedevelopmentofnewtypefunctionalmaterialssuchasmolecularmagnetic ,selectedcatalysis ,reversiblecatalysis ,reversiblehost guestmolecular(ion)exchangeetc.,3themoleculardesignandsynthesishavealreadyattractedconsiderableattentioninsupramolecu larsystem .Thesupramolecularcomplexesandorganiccom poundscontainin…  相似文献   

15.
1 INTRODUCTION 2,4,6-Trinitro-1,3,5-trihydroxybenzene(trinitro- phloroglucinol, TNPG) is a strong acidic organic com- pound with yellow needle crystal structure. There are three nitro-groups and three phenolic hydroxyl groups conjugated with the ring, so it is an important explosive. It can react with metallic compounds forming metallic salts of TNPG, which have strong combustion and detonating properties. The lead salt of TNPG has been extensively studied and recom- mended to use as…  相似文献   

16.
SynthesisandCrystalStructureof[C_6H_5CH_2C_5H_4ErCl_2(THF)_3]·THFGaoFu-Xing;WeiGe-Cheng;JinZhong-Sheng;ChenWen-Qi(ChangchunInsti?..  相似文献   

17.
1INTRODUCT1oNMeta1liccomplexesofsomeSchiffbaseshaveantiviraIandfungistaticac-tivies[1-3i.SomeSchiffbasemetalliccomplexeshavecatalyticactivityasenzyme"'.Thisaspectacu1arresearchfield-WehavereportedthesynthesisandcrystalstructureofNd(llI)nitratecomplexwithN,N-disalicyclideneethylenediamineandDMSO(si'HerethetitlecomplexwasobtainedandcharacterizedbyX-raydiffrac-tion'Theligandisdischiffbaseofcondensationfrom2-hydroxyl-3-methoxyben-zoaldehydeandethylenediamine.2EXPERIMENTAL2.1Synthesi…  相似文献   

18.
1 INTRODUCTION Pyrrole and its derivatives have attracted much attention due to their chemical properties as well as biological activities[1]. They have been widely used to produce pharmaceutical, essences, biochemicals, etc. It has been found that a great number of pyrrole derivatives present antitumor and antiviral activi- ties[2 ~ 5]. During our searches for bioactive com- pounds, a series of pyrrole derivatives were synthe- sized[6, 7]. We report here the synthesis of 3-(pyrrole- 2?-…  相似文献   

19.
CrystalandMolecularStructureof(η~5-C_5H_5)_2Yb(NC_4H_4)(OC_4H_8)WangShao-Wu;YuYong-Fei;HuJi-ping;YeZhong-Wen(InstituteofOrganicCh...  相似文献   

20.
CrystalStructureof[La(NO_3)_3(12-crown-4)-(H_2O)](12-crown-4)MaoJiang-Gao;JinZhong-Sheng;YuFeng-Lan(LaboratoryofRareEarthChemi?..  相似文献   

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