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1.
《结构化学》2016,(8)
The interaction of Hg~(2+) with polyphenyl quinoxaline ligand 2,3,6,7,10,11-hexaphenyldipyrazino[2,3-f:2?,3?-h]quinoxaline(HPQ) was investigated, and a new complex(C_(49)H_(32)N_6Br_2Cl_2Hg) has been synthesized and characterized. It exhibits a 0D single-core structure,and adopts triclinic P 1 space group with a = 11.139(2), b = 13.429(3), c = 14.488(3) ?, α =76.10(3), β = 83.16(3), γ = 87.36(3)o, V = 2088.4(7) ?3, Z = 2, S = 1.056, F(000) = 1104, R = 0.0417 and w R = 0.0931(I 2σ(I)). Furthermore, the behavior of HPQ with Hg~(2+) in the solution was also investigated, and the result shows that HPQ was found to have excellent fluorescent selectivity for Hg~(2+) over many other metal ions(Li~+, K~+, Na~+, Sr~+, Ca~(2+), Mg~(2+), Mn~(2+), Fe~(3+), Ni~(2+), Co~(2+), Cu~(2+), Zn~(2+),Cd~(2+), Pb~(2+), Al~(3+) and Cr~(3+)) based on the intermolecular charge-transfer mechanism, which makes HPQ a potential fluorescence sensor or probe for Hg~(2+). 相似文献
2.
Zn C6H8N2O5.H2O(NCGZn) has been synthesized, and its functional groups present in the title compound were confirmed by elemental analysis, TG and IR spectral studies. Meanwhile, the crystal of NCGZn was obtained by slow evaporation of a saturated aqueous solution at room temperature and confirmed by single-crystal X-ray diffraction analysis. It crystallizes in triclinic, space group P21 with a = 5.03220(1), b = 13.3747(4), c = 12.9944(4) , β = 92.987(2)o, V = 873.39(4) 3, Z = 2, C12H20N4O12Zn2, Mr = 543.10, Dc = 2.065 g/cm3, F(000) = 552, μ(Mo Ka) = 2.826 mm-1, R = 0.0422 and w R = 0.1142. In NCGZn, Zn(1) and the symmetry formed Zn(1) ions are connected by five atoms from four NCG-2H anions and a water molecule. A NCG ligand has two carboxylate groups, one connecting a Zn ion, and the other bridgiong two Zn ions. The NCG ligand bridges four Zn ions through the amino group and two carboxylate groups with a water molecule to yield a 3D coordination polymer structure with hydrogen bonds. 相似文献
3.
An organotin(Ⅳ) complex [(CH3)2Sn(4-FC6H4CONHO)2] has been synthesized and characterized by elemental analysis, IR, 1H NMR and X-ray single-crystal diffraction techni-ques. The crystal belongs to the orthorhombic system, space group Pbca with a = 9.7565(13), b = 17.664(2), c = 20.784(3) A, Z= 8, V= 3581.9(8) A3 Dc = 1.695 g/cm3, μ(MoKα) = 1.469 mm-1, F(000) = 1808, R = 0.0321 and wR = 0.0838. In the molecular structure of the title complex, the tin atoms are five-coordinated in a trigonal bipyramidal geometry, and the special coordination properties of dimethyltin(Ⅳ) with hydroxamate-type ligands are also discussed. 相似文献
4.
1INTR0DUCTI0NRecently,thedesignandsynthesisofdinuclearcomplexeshavebeenafascinat-ingareaofresearchowingt0theirimportanceinbasicandappliedchemistry"'.Par-ticularintersthasdevelopedindinuclearcomplexesasmodelsformeta1loproteins"'.Inanattempttosynthesizethetypeof[Ln(S,CN(C2H,)2)3j[Co(S2CN(C2H5)2)2jdinuc1earcomplex,thepurefinecrystalsofCo[S2CN(C2H5)2)2)3were0btained.2EXPERIMENTAL2'1Preparation0fC0[S,CN(C,H,),j,TotheclearsolutionoftheanhydrousSmCl3(0.5mmol)in5mLanhydrousethanolw… 相似文献
5.
《结构化学》2016,(1)
The interaction of metal ions(Hg~(2+),Pb~(2+),Co~(2+),Mn~(2+)) with polypyridyl quinoxaline ligand 2,3,6,7,10,ll-hexakis(2-pyridyl)dipyrazino[2,3-f:20,30-h]quinoxaline(HPDQ) was investigated,and four new complexes have been synthesized and characterized.Complex 1 exhibits a 0dimensional dual-core structure,2 is a one-dimensional chain structure based on a dual-core Pb unit,while 3 and 4 show a 0 dimensional single-core structural unit.Complex 1 is of monoclinic system,space group C2/c with a = 19.211(4),b = 23.896(5),c = 12.698(3) ?,β= 120.11(3)°,V= 5043.0(17)?~3,Z = 4,S = 1.053,F(000) = 2976,R~a = 0.0637 and wR~b = 0.1068(I 2σ(I)).Complex 2 adopts triclinic system,space group P1 with a = 10.370(2),b = 12.195(2),c = 21.033(4) ?,α = 80.87(3),β= 81.22(3),γ = 82.38(3)°,V= 2579.3(8) ?~3,Z = 2,S = 1.099,F(000) = 1328,R~a = 0.0609 and wR~b =0.1365(I 2σ(I)).Complex 3 is of monoclinic system,space group Cllc with a = 14.166(3),b =16.621(3),c = 20.248(4) ?,β = 92.18(3)°,V= 4764.0(16) ?~3,Z = 4,S = 1.005,F(000) = 2108,R~a =0.0589 and wR~b = 0.1332(I 2σ(I)).Complex 4 belongs to the monoclinic system,space group C2/c with a = 14.404(3),b = 16.626(3),c = 20.346(4) ?,β = 92.43(3)°,V= 4868.2(17) ?~3,Z = 4,S= 1.068,F(000) = 2108,R~a = 0.0833 and wR~b = 0.1591(I 2σ(I)).Furthermore,the behavior of HPDQ with Hg~(2+),Pb~(2+),Co~(2+) and Mn~(2+) in the solution was also investigated,and the result shows after the metal ions were added respectively,the emission of all solutions shows fluorescence quenching and has a red shift compared with that of the HPDQ ligand. 相似文献
6.
A bismuth(Ⅲ) complex 1 (H2-4,4'-bipy)Bi(HPPA)5(H2PPA)·4H2O (H2PPA = p-hydroxy-phenylacetic acid, 4,4'-bipy = 4,4 -bipyridyl) was hydrothermally synthesized from p-hydroxy-phenylacetic acid (H 2 PPA), Bi(NO 3) 3 ·6H 2 O and 4,4 -bipyridyl, and characterized by elemental analysis, IR, molar conductivity and TG. The single-crystal X-ray diffraction studies demonstrated that the complex is of monoclinic system, space group P21 with a = 10.928(7), b = 22.558(7), c = 11.313(7), β = 91.864(4)°, V = 2787.7(4)3 , Z = 2, C58H61BiN2O22 , Mr = 1347.07, F(000) = 1364, Dc = 1.605 g/cm-3 , μ(MoKα) = 3.247 mm-1 , the final R = 0.0269 and wR = 0.0540 for 9776 observed reflections with Ⅰ > 2σ(Ⅰ). The bismuth(Ⅲ) is seven-coordinated with O atoms, forming a monocapped octahedral geometry. Complex 1 further forms a 3D supramolecular architecture by hydrogen bonds and π-π stacking interactions. Moreover, the interaction between the complex and DNA was studied by EtBr fluoescent probe. 相似文献
7.
《结构化学》2016,(9)
The interaction of Hg(Ⅱ), Cu(Ⅰ) and Ag(Ⅰ) with dipyridine quinoxaline ligand 2,3-bis(2-pyridyl)quinoxaline(DPQ) were investigated, and three new complexes have been synthesized and characterized. Complex 1 exhibits a 0D dual-core structure, complex 2 is a 0D tetra nuclear case based on a dual-core Cu unit, and complex 3 shows a one-dimensional pipeline structure. Furthermore, the optical properties of complex and DPQ were also investigated, and the results showed that the fluorescence intensity of complexes was weaker than that of ligand DPQ. 相似文献
8.
1 INTRODUCTION The picoloylhydrazide compounds are close to thebiologic environment and can react with microele-ments in organism so as to have antitubercular andantineoplastic activities. However, owing to the exis-tence of amino group, this kind of compounds aretoxic to some extent[1]. In order to decrease theirtoxicity, hydrazone or hydrazide compounds synthe-sized by the condensation reaction of amino and car-bonyl groups have been well studied in recentyears[1~7]. Herein we report t… 相似文献
9.
Using Cu(Ⅱ) as the template, a complex {[Cu2L2(H2O)2] 4H2O}n (L = N-acetoxyl-
picolinamide) has been successfully synthesized and characterized by single-crystal X-ray diffrac
tion. The crystal is of monoclinic, space group C2/c, with a = 24.144(5), b = 7.1622(14), c =
17.283(4) (A), C16H24Cu2N4O12, Mr = 591.47, β = 131.73(3)°, V = 2230.3(8) (A)3, Z = 4, Dc= 1.761
g/cm3, F(000) = 1208,μ = 1.978 mm-1, R = 0.0400 and wR = 0.1099. The copper (Ⅱ) ion is five
coordinated with a distorted square pyramidal geometry. The complex can be viewed as a one
dimensional chain structure by carboxylic bridges among copper atoms. In the complex there exist
hydrogen bonding interactions to stabilize the structure. 相似文献
10.
A novel Tb(Ⅲ) coordination polymer [Tb(bpapO2)2(NO3)3]n [bpapO2 = N2,N6- bi(pyridin-2-yl)pyridine-2,6-diamine-N,N'-dioxide-dioxide] has been synthesized and it exhibits terbium's characteristic fluorescent emission under UV radiation of 326 nm at room temperature. X-ray structural determination indicates that each terbium(Ⅲ) ion, centered in TbO8 core, connects to three adjacent coordinate centers via a bi-dentate ligand bpapO2, forming a one-dimensional coordination polymer. The compound crystallizes in the triclinic system, space group P1, with a = 11.2271(5), b = 11.7997(5), c = 14.8016(6) Ⅲ, α = 72.7060(10), β = 89.9630(10), γ = 66.7680(10)o, Z = 2, Dc = 1.822 g/cm3, V = 1705.14(13) Ⅲ3, F(000) = 932, the final R = 0.0340 and wR = 0.0669 for 4812 observed reflections with I 2σ(I). 相似文献
11.
CMAO Jiang-Gao 《结构化学》1998,(5)
1INTR0DUCTI0NLanthanidecarboxylatecomplexeshavebeenwidelystudiedt1iandm0starefoundtoexhibitavarietyofdimericorinfinitechainstructures.Recentstudiesinourlaboratoryhavedem0nstratedthattheprototypetertiaryaminebetaine(Me,N CHzC0z-)anditsderivativesareusefulinthegenerationoflanthanidecarb0xylate-likecomplexeswithnewstructuralfeaturesduetotheiroverallchargeneutralityandpossibleinclusionofvariouskindsofcounteranionsinthestructuret2~4i.Thelan-thanidecomplexesisolatedsofarhavebeenfoundtobemononu… 相似文献
12.
A new three-dimensional coordination polymer [Ce_2(C_4H_4O_4)_3(H_2O)_2]_n·3.2 nH_2 O, constructed by Ce(Ⅲ) ion and succinate ion and lattice water molecules has been synthesized under hydrothermal conditions. It crystallizes in triclinic system, space group P1 with a = 7.8865(6), b = 12.0260(8), c = 12.2598(9) ?, α = 112.456(2)o, β = 90.046(2)o, γ = 100.423(2)o, Mr = 722.14, V = 1053.73(13) ?~3, Z = 2, Dc = 2.276 g/cm~3, μ = 4.35/mm, F(000) = 696, GOF = 1.029, R = 0.0203 and w R = 0.0570. The asymmetric unit contains two Ce~(3+) cations and both of them are nine-coordinated and their coordination geometries can be described as two distorted monocapped square antiprisms. In the title compound, a three-dimensional coordination network with one-dimensional hexagon honeycomb-like channels along the a axis is generated. TG measurement has been carried out, and its result analysis along with the powder XRD determination indicates the residue to be CeO_2. 相似文献
13.
1INTRODUCTIONHydrazoneshavebeenattractingmuchatten-tionfromchemistsinrecentyearsbecauseoftheirbiologicalactivities,chemicalandindustrialversa-tility,andstrongtendencytochelatetotransitionmetals[1,2],lanthanidemetals[3]andmaingroupmetals[4,5].Inthehydrazonecomplexes,thehydra-zoneligandcanactasaneutralormononegativebidentateligand,orevenasadianionictridentateliganddependingonthedonoratomsoftheligandsandthereactionconditions.Ontheotherhand,variouscompoundsderivedfromphenoxyaceticacidareveryus… 相似文献
14.
A new dinuclear La(Ⅲ) complex [La2(4-cba)4[H(4-cba)2]2(phen)2(H2O)4] (4-Hcba = 4-cyanobenzoic acid and phen = 1,10-phenanthroline) 1 has been synthesized by solvothermal reaction in an ethanol/water mixed solution at 100 ℃ and structurally characterized by single- crystal X-ray diffraction. Crystallographic data: C88H58La2N12O20, Mr = 1881.28, triclinic P(1), a = 7.518(3), b = 17.033(6), c = 17.551(6)(A), α = 115.333(4), β = 92.9910(10), γ = 99.366(5)°, V = 1985.3(12) (A)3, Z = 1, Dc = 1.574 g/cm3, F(000) = 944 μ = 1.145 mm-1, the final R = 0.0281 and wR = 0.0686 for 6708 reflections with Ⅰ >2σ(Ⅰ). In 1, two nine-coordinated La(Ⅲ) ions are connected by two 4-cba ligands in a syn-syn bidentate coordination mode, and the other six 4-cba ligands terminate the La(Ⅲ) ions, resulting in an isolated dinuclear structure. Two different types of intramolecular hydrogen bonds, asymmetrical O-H…O and symmetrical O…H…O, exist in the crystal. The title complex molecules are connected through hydrogen bonds and weak π-πstacking interactions to generate a 2-D layered network. The thermogravimetric analysis of 1 has also been discussed. 相似文献
15.
A novel Fe(Ⅲ) Schiff base complex,FeⅢ(HL) {H4L = 1,1,1,1-tetrakis[(salicylaldimino)methyl]methane},has been prepared and characterized by elemental analyses,IR spectrum,and single-crystal X-ray diffraction analysis.The crystal belongs to the monoclinic system,space group P21/n with a = 12.569(3),b = 12.955(3),c = 17.647(4) ,β = 91.896(9)°,V = 2871.9(1) 3,Z = 4,Dc = 1.391 g/cm3,F(000) = 1252.0,Mr = 601.45,R = 0.0383 and wR = 0.1025.The structural analysis reveals that the Fe(Ⅲ) ions are six-coordinated by imine nitrogen atoms and phenolic oxygen atoms form three pendant arms of Schiff base ligands,and one of the salicylaldimine chelating units remains uncoordinated.Discrete complex molecules were further assembled into 1D supramolecular aggregations by C-H…O hydrogen bonding and C-H…π interactions. 相似文献
16.
A chiral salency complex,[Mn(Salency)(H2O)2](PF6)·2H2O 1(Salency =(R,R)-N,N'-bis(salicylidene)-1,2-cyclohexanediamine),has been prepared by the reaction of Mn(CH3COO)3·2H2O with Salency and NH4PF6,and was established by X-ray diffraction techniques.The complex crystallizes in triclinic,space group P1 with a=9.299(8),b=10.012(8),c=13.461(11),α=92.037(15),β=92.974(12),γ=93.530(18)°,V=1248.3(18)3,C20H28F6MnN2O6P,Mr = 592.35,Z=2,Dc=1.038 g/cm3,F(000)=608,μ=0.676 mm-1,the final R=0.0651 and wR=0.1880 for 5260 observed reflections with I 2σ(I). 相似文献
17.
A mixed complex [Zn(C5H6N2)(HL)2] (C5H6N2 = 2-aminopyridine, H2L = acetyl- acetone) has been synthesized and characterized by IR, elemental analysis and X-ray single-crystal diffraction analysis. The crystal belongs to monoclinic, space group P21/c with a = 7.4490(15), b = 8.2650(17), c = 27.615(6)(A),β = 101.69(3)°, V = 1664.9(6)(A)3, Z = 4, Mr = 357.70, Dc = 1.427 g/cm3, F(000) = 744, μ = 1.493 mm-1, R = 0.0309 and wR = 0.0771. The Zn(II) is coordinated by one nitrogen atom from 2-aminopyridine and four oxygen atoms from two acetylacetone anions to furnish a distorted square pyramid geometry. The complex forms a three-dimensional network through intermolecular hydrogen bonds. 相似文献
18.
1INTRODUCTIONCoppercomplexeshavealargevarietyofstericstructuresandplayanimportantroleincatalysingtheenzymaticactivities,which... 相似文献
19.
Matthew J. Bernett Adrianne K. Tipton Michael T. Huggins Jonathan H. Reeder David A. Lightner 《Monatshefte für Chemie / Chemical Monthly》2000,40(12):239-249
A crystal structure determination of 2,2′-bipyrroyl (1; 2,2′-dipyrryl-diketone, bis (2-pyrrolyl)ethanedione) and its spectroscopic properties in solution are reported. In the crystal, 1 self-assembles via hydrogen bonding into supramolecular ribbons that extend indefinitely through the crystal lattice. The observed molecular conformation is one where each pyrrole ring and adjacent carbonyl group are co-planar (torsion angle ∼ 0.9°), with the N-H pointing in the same direction as the C=O. The two carbonyls have a transoid but not co-planar geometry with a torsion angle of ∼128°. Adjacent molecules in the crystal are linked by pairs of intermolecular hydrogen bonds, pyrrole NH to carbonyl oxygen, to form a matrix of polymeric chains that lie like neatly stacked, parallel streams of ribbons. Molecular mechanics calculations on the monomer indicate an intra-molecularly hydrogen bonded planar conformation (sp, ap, sp) at the global energy minimum. In CHCl3, 1 is monomeric according to vapor pressure osmometry (MW obs=179±10 vsċMW calc=188). In THF, the measured molecular weight is 340±15, which corresponds best to one molecule of 1 solvated by two THF molecules (MW=322 for C10H8N2O4ċ2 C4H8O) rather than to a dimer. 相似文献
20.
Matthew J. Bernett Adrianne K. Tipton Michael T. Huggins Jonathan H. Reeder David A. Lightner 《Monatshefte für Chemie / Chemical Monthly》2000,131(3):239-249
Summary. A crystal structure determination of 2,2′-bipyrroyl (1; 2,2′-dipyrryl-diketone, bis (2-pyrrolyl)ethanedione) and its spectroscopic properties in solution are reported. In the crystal, 1 self-assembles via hydrogen bonding into supramolecular ribbons that extend indefinitely through the crystal lattice. The observed molecular
conformation is one where each pyrrole ring and adjacent carbonyl group are co-planar (torsion angle ∼ 0.9°), with the N-H
pointing in the same direction as the C=O. The two carbonyls have a transoid but not co-planar geometry with a torsion angle
of ∼128°. Adjacent molecules in the crystal are linked by pairs of intermolecular hydrogen bonds, pyrrole NH to carbonyl oxygen,
to form a matrix of polymeric chains that lie like neatly stacked, parallel streams of ribbons. Molecular mechanics calculations
on the monomer indicate an intra-molecularly hydrogen bonded planar conformation (sp, ap, sp) at the global energy minimum. In CHCl3, 1 is monomeric according to vapor pressure osmometry (MW
obs=179±10 vsċMW
calc=188). In THF, the measured molecular weight is 340±15, which corresponds best to one molecule of 1 solvated by two THF molecules (MW=322 for C10H8N2O4ċ2 C4H8O) rather than to a dimer.
Received October 21, 1999. Accepted November 2, 1999 相似文献