共查询到20条相似文献,搜索用时 15 毫秒
1.
Karina Passalacqua Morelli Frin 《Inorganica chimica acta》2011,376(1):531-537
Photochemical and photophysical properties of fac-[Re(CO)3(Clphen)(trans-L)]+ complexes, Clphen = 5-chloro-1,10-phenathroline and L = 1,2-bis(4-pyridyl)ethylene, bpe, or 4-styrylpyridine, stpy, were investigated to complement the understanding of intramolecular energy transfer process in tricarbonyl rhenium(I) complexes having an electron withdrawing group attached to polypyridyl ligands. These new compounds were synthesized, characterized and the photoisomerization quantum yields were accurately determined by 1H NMR spectroscopy. The true quantum yields for fac-[Re(CO)3(Clphen)(trans-bpe)]+ were constant (Φ = 0.55) at all investigated irradiation wavelengths. However, for fac-[Re(CO)3(Clphen)(trans-stpy)]+, similar true quantum yields were observed only at higher energy irradiation (Φ313 nm = 0.53 and Φ365 nm = 0.57), but it decreased significantly at 404 nm (Φ = 0.41). These results indicated different deactivation pathways for the trans-stpy complex photoisomerization. Quantum yields decreased as the 3ILtrans-L and 3MLCTRe→NN excited states become closer and the behavior was discussed in terms of the excited state energy gaps. Additionally, luminescence properties of photoproducts, fac-[Re(CO)3(Clphen)(cis-L)]+, were also investigated in different environments to analyze the relative energy of the 3MLCTRe→Clphen excited state for each compound. 相似文献
2.
The reaction of 2-(2-aminophenyl)benzothiazole (Habt) with [Re(CO)5Br] led to the isolation of the rhenium(I) complex fac-[Re(Habt)(CO)3Br] (1). With trans-[ReOCl3(PPh3)2], the ligand Habt decomposed to form the oxofree rhenium(V) complex [Re(itp)2Cl(PPh3)] (2) (itp = 2-amidophenylthiolate). From the reaction of trans-[ReOBr3(PPh3)2] with 2-(2-hydroxyphenyl)benzothiazole (Hhpd) the complex [ReVOBr2(hpd)(PPh3)] (3) was obtained. Complexes 1-3 are stable and lipophilic. 1H NMR and infrared assignments, as well as the X-ray crystal structures, of the complexes are reported. 相似文献
3.
A new zinc(II) compound, [Zn2(Hsal)4(4,4′-bpe)2] · [Zn(Hsal)2(4,4′-bpe)(DMF)(H2O)] · CH3OH (1) (Hsal = salicylate and 4,4′-bpe = trans-1,2-bis(4-pyridyl)ethylene) has been synthesized and characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis, and single crystal X-ray diffraction. The crystal structure consists of three independent moieties: [Zn2(Hsal)4(4,4′-bpe)2], [Zn(Hsal)2(4,4′-bpe)(DMF)(H2O)], and non-coordinated CH3OH molecule. In the compound two independent moieties which are connected by 4,4′-bpe to form 1-D chains, respectively, are further expended to accomplish 2-D network through hydrogen-bonding interactions between non-coordinated methanol and coordinated water molecule or carboxylate oxygen atoms of Hsal ligands. 相似文献
4.
The character and dynamics of low-lying electronic excited states of the complexes fac-[Re(Cl)(CO)3(papy)2] and fac-[Re(papy)(CO)3(bpy)]+ (papy = trans-4-phenylazopyridine) were investigated using stationary (UV-Vis absorption, resonance Raman) and ultrafast time-resolved (visible, IR absorption) spectroscopic methods. Excitation of [Re(Cl)(CO)3(papy)2] at 400 nm is directed to 1ππ∗(papy) and Re → papy 1MLCT excited states. Ultrafast (?1.4 ps) intersystem crossing (ISC) to 3nπ∗(papy) follows. Excitation of [Re(papy)(CO)3(bpy)]+ is directed to 1ππ∗(papy), 1MLCT(papy) and 1MLCT(bpy). The states 3nπ∗(papy) and 3MLCT(bpy) are then populated simultaneously in less then 0.8 ps. The 3MLCT(bpy) state decays to 3nπ∗(papy) with a 3 ps time constant. 3nπ∗(papy) is the lowest excited state for both complexes. It undergoes vibrational cooling and partial rotation around the -NN- bond, to form an intermediate with a nonplanar papy ligand in less than 40 ps. This species then undergoes ISC to the ground state potential energy surface, on which the trans and cis isomers are formed by reverse and forward intraligand papy rotation, respectively. This process occurs with a time constant of 120 and 100 ps for [Re(Cl)(CO)3(papy)2] and [Re(papy)(CO)3(bpy)]+, respectively. It is concluded that coordination of papy to the Re center accelerates the ISC, switching the photochemistry from singlet to triplet excited states. Comparison with analogous 4-styrylpyridine complexes (M. Busby, P. Matousek, M. Towrie, A. Vl?ek Jr., J. Phys. Chem. A 109 (2005) 3000) reveals similarities of the decay mechanism of excited states of Re complexes with ligands containing -NN- and -CC- bonds. Both involve sub-picosecond ISC to triplets, partial rotation around the double bond and slower ISC to the trans or cis ground state. This process is about 200 times faster for the -NN- bonded papy ligand. The intramolecular energy transfer from the 3MLCT-excited ∗Re(CO)3(bpy) chromophore to the intraligand state of the axial ligand occurs for both L = stpy and papy with a comparable rate of a few ps. 相似文献
5.
The reactions of 1 equiv. of the ligand 3-(ethoxycarbonylmethyl-pyridin-2-ylmethyl-amino)-propionic acid methyl ester (2) with the Re(V) starting materials [ReOX3(PPh3)2] (X = Cl, Br) in refluxing chloroform yielded the Re(V)-oxo dihalide complexes [ReOX2{(C5H4NCH2)N(CH2CO2)(C2H4CO2CH3)}] (X = Cl, 3; X = Br, 4). The complexes were characterized by elemental analysis, NMR and IR spectroscopy, cyclic voltammetry and X-ray crystallography. Complex 3 displays distorted octahedral coordination geometry with the tridentate ligand coordinating facially to the Re(V) center. The carboxylate oxygen atom occupies an axial site trans to the ReO bond. The two chlorine atoms consequently adopt a cis configuration. 相似文献
6.
In [PtX(PPh3)3]+ complexes (X = F, Cl, Br, I, AcO, NO3, NO2, H, Me) the mutual cis and trans influences of the PPh3 groups can be considered constants in the first place, therefore the one bond Pt-P coupling constants of P(cis) and P(trans) reflect the cis and trans influences of X. The compounds [PtBr(PPh3)3](BF4) (2), [PtI(PPh3)3](BF4) (3), [Pt(AcO)(PPh3)3](BF4) (4), [Pt(NO3)(PPh3)3](BF4) (5), and the two isomers [Pt(NO2-O)(PPh3)3](BF4) (6a) and [Pt(NO2-N)(PPh3)3](BF4) (6b) have been newly synthesised and the crystal structures of 2 and 4·CH2Cl2·0.25C3H6O have been determined. From the 1JPtP values of all compounds we have deduced the series: I > Br > Cl > NO3 > ONO > F > AcO > NO2 > H > Me (cis influence) and Me > H > NO2 > AcO > I > ONO > Br > Cl > F > NO3 (trans influence). These sequences are like those obtained for the (neutral) cis- and trans-[PtClX(PPh3)2] derivatives, showing that there is no dependence on the charge of the complexes. On the contrary, the weights of both influences, relative to those of X = Cl, were found to depend on the charge and nature of the complex. 相似文献
7.
Zubair Ahmed 《Inorganica chimica acta》2010,363(11):2606-2615
Solution studies on the complexes of the type [Ln(hfaa)3(phen)2] (Ln = La, Pr and Nd) and [Ln(hfaa)3phen] (Ln = Nd, Ho, Er and Yb; hfaa stands for the anion of 1,1,1,5,5,5-hexafluoro-2,4-pentanedione and phen stands for 1,10-phenanthroline) are presented. These complexes are synthesized in high yields by an in situ method in which hfaa, ammonium hydroxide, lanthanide chlorides and phen were allowed to react in 3:3:1:1 molar ratio in ethanol. In the case of neodymium both eight- and ten-coordinate complexes are isolated. The paramagnetic shifts of the methine protons of β-diketone have their sign opposed to those of paramagnetic shifts of phen protons and the shifts are dominated by dipolar interactions. The inter- and intramolecular shift ratios have been calculated and discussed. The 4f-4f absorption spectra of the complexes of Pr, Nd, Ho and Er are analyzed. The eight- and ten-coordinate neodymium complexes display distinctively different band shapes of the 4G5/2,2G7/2 ← 4I9/2 hypersensitive transition. The efficient energy transfer from ligand to Pr(III) is reflected by strong red luminescence of this complex at room temperature. 相似文献
8.
Two 15N-labelled cis-Pt(II) diamine complexes with dimethylamine (15N-dma) and isopropylamine (15N-ipa) ligands have been prepared and characterised. [1H,15N] HSQC NMR spectroscopy is used to obtain the rate and equilibrium constants for the aquation of cis-[PtCl2(15N-dma)2] at 298 K in 0.1 M NaClO4 and to determine the pKa values of cis-[PtCl(H2O)(15N-dma)2]+ (6.37) and cis-[Pt(H2O)2(15N-dma)2]2+ (pKa1 = 5.17, pKa2 = 6.47). The rate constants for the first and second aquation steps (k1 = (2.12 ± 0.01) × 10−5 s−1, k2 = (8.7 ± 0.7) × 10−6 s−1) and anation steps (k−1 = (6.7 ± 0.8) × 10−3 M−1 s−1, k−2 = 0.043 ± 0.004 M−1 s−1) are very similar to those reported for cisplatin under similar conditions, and a minor difference is that slow formation of the hydroxo-bridged dimer is observed. Aquation studies of cis-[PtCl2(15N-ipa)2] were precluded by the close proximity of the NH proton signal to the 1H2O resonance. 相似文献
9.
Med Abderrahmane K. Sanhoury Med Taieb Ben Dhia Med Rachid Khaddar 《Inorganica chimica acta》2009,362(10):3763-3768
The synthesis, characterisation and solution behaviour of a series of octahedral complexes SnCl4·2L (L = R2NP(O)(OCH2CF3)2; R = Me (1); Et (2) or L = P(O)(OCH2Rf)3; Rf = CF3 (3); C2F5 (4)) are described. Complexes 1-4 were prepared from SnCl4 and 2 equiv. of the ligand, L, in anhydrous CH2Cl2 solution. The adducts have been characterised by multinuclear (1H, 31P and 119Sn) NMR, IR spectroscopy and elemental analysis. In dichloromethane solution, the NMR data showed the presence of a mixture of cis and trans isomers for 1 and 2 and only the cis isomer for 3 and 4. The difference could be interpreted in terms of the electronic effects of the substituents on the phosphorus atom of the ligand. In addition, the solution structure of the complexes studied by variable temperature 31P-{1H} and 1H NMR in the presence of excess ligand indicated that the ligand exchange on the cis isomer dominates the chemistry. The metal-ligand exchange barriers were estimated to be 13.38 and 11.39 kcal/mol for 1 and 3, respectively. The results are discussed and compared with those previously reported for the related hexamethylphosphoramide adduct, SnCl4·2HMPA. 相似文献
10.
A series of tridentate ligands consisting of mixed aromatic and aliphatic amine derivatives of single amino acid chelates and phenylpiperazine have been developed, and their reactions with [NEt4]2[ReBr3(CO)3] have been investigated. The compounds [Re(CO)3{(NC5H4CH2)NCH3(C2H4)NHCH3}]Br (4), [Re(CO)3{(NC5H4CH2)NCH3(C2H4)NCH3(CH2)xCOOC2H5}]Br (x = 1, 5; x = 4, 6) [Re(CO)3{(NC5H4CH2)NH(C2H4)N(CH3)2}]Br (7), [Re(CO)3{(NC5H4CH2)N(CH 2COOC2H5)(C2H4)N(CH3)2}]Br (8) and [Re(CO)3(NC5H4CH2)(C2H4NH2)N(CH2)3-CH3Ophenpip]Br (9) (phenpip: phenylpiperazine, -C6H4-(CH2CH2)2N-) were prepared and characterized by elemental analysis, NMR, IR, HSMS and X-ray crystallography. All complexes exhibit fac-{Re(CO)3N3} coordination geometry in the cationic molecular unit. Crystal data for C13H17BrN3O3Re (4): orthorhombic, Pbca, a = 13.4510(8) Å, b = 10.5728(6) Å, c = 22.5378(13) Å, V = 3205.2(3) Å3, Z = 8; C17H23BrN3O5Re (5): orthorhombic, Pcca, a = 16.5907(7) Å,b = 14.8387(6) Å, c = 16.7075(7) Å, V = 4113.1(3) Å3, Z = 8; C13H25BrN3O7Re (7 · 4H2O): monoclinic, P21/n, a = 14.0698(17) Å, b = 9.6760(12) Å, c = 15.6099 (19) Å, β = 114.930(2)°, V = 1927.1(4) Å3, Z = 4; C17H23BrN3O5Re (8): monoclinic, P21/n, a = 7.5312(5) Å, b = 16.0366(10) Å, c = 16.8741(10) Å, β = 98.9990(10)°, V = 2012.9(2) Å3, Z = 4. 相似文献
11.
Carol F. Fortney Steven J. Geib Fu-tyan Lin Rex E. Shepherd 《Inorganica chimica acta》2005,358(10):2921-2932
Two ruthenium nitrosyl bis-pyridyl/biscarboxamido compounds, [Ru(NO)(bpp)Cl · 2H2O] [bpp = N,N′-bis(2-pyridinecarboxamide)-1,3-propane dianion] and [Ru(NO)(bpe)Cl · 2H2O] [bpe = N,N′-(bis-2-pyridinecarboxamide)-1,2-ethane dianion] have been characterized by 1H NMR, 13C{1H} NMR, and IR spectroscopies, electrospray ionizaton mass spectrometry, and X-ray crystallography. 相似文献
12.
Md. Kudrat-E-Zahan 《Inorganica chimica acta》2010,363(1):168-189
Electronic spectra of Ni(acac)2 were studied in acetone, DMF, and some other solvents for the purpose of identifying the cis/trans isomers from the spectra (acac− = acetylacetonate anion). The spectral components were investigated in the spin-allowed transition bands, and a relationship was found between the spectral pattern and the cis/trans isomers. According to this relationship, it was concluded that the cis isomer was formed in DMF and in N-methylformadide, whereas the trans isomer was formed in acetone and in pyridine. Based on the DFT computation, the cis-[Ni(acac)2(DMF)2] was found to be stabilized by intramolecular hydrogen bonds between acetylacetonate and DMF. 相似文献
13.
Lixin Zhou 《Inorganica chimica acta》2011,376(1):44-56
The monofunctional and bifunctional bindings of the potential anticancer drug trans-isopropylaminedimethylaminedichloroplatinum (trans-IPADMADP) and its cis isomer to purine base in DNA are explored by using density functional theory and IEF-PCM solvation models. The computed lowest free energy barrier in the aqueous solution is 14.0/11.6 kcal/mol (from trans-Pt-chloroaqua complex to trans-/cis-monoadduct) for guanine(G), and 11.7/13.3 kcal/mol (from trans-Pt-chloroaqua complex to trans-/cis-monoadduct) for adenine(A). Our calculations demonstrate that the trans reactant complexes (or isolated reactants) can generate trans- or cis-monoadducts via similar trigonal bipyramidal transition state structures, suggesting that the monoadducts can subsequently close to form the bifunctional intrastrand Pt-DNA adducts and simultaneously distort DNA in the similar way as cisplatin. Our calculations show that Pt(isopropylamine)(dimethylamine)G22+ head-to-head path has the lowest free energy of activation at 17.6 kcal/mol, closely followed by the Pt(isopropylamine)(dimethylamine)GA2+ head-to-head path at 19.6 kcal/mol when the monofunctional cis-Pt-G complex serves as the reactant; while the Pt(isopropylamine)(dimethylamine)G22+ head-to-tail adduct has the lowest barrier of 20.5 kcal/mol, closely followed by the Pt(isopropylamine)(dimethylamine)GA2+ head-to-tail adduct at 23.0 kcal/mol if the monofunctional trans-Pt-G complex is the reactant.The calculated relatively lower activation energy barrier than that of cisplatin theoretically confirm that trans-[PtCl2(isopropylamine)(dimethylamine)] is a potential anticancer drug as described by experiment. 相似文献
14.
The ruthenium complexes, trans-[Ru(phen-NH-phen)(eina)2](PF6)2 and trans-[Ru(phen-NH-phen)(ina)2](PF6)2 where phen-NH-phen = N,N-bis(1,10-phenanthroline-2-yl)amine, ina = isonicotinic acid and eina = ethyl isonicotinate, have been synthesized and characterized by 1H NMR, elemental analysis, and IR spectroscopy. The compounds were non-emissive at room temperature, but displayed intense photoluminescence in 4:1 ethanol/methanol glasses at 77 K with corrected emission maximum at 570-580 nm. A quasi-reversible wave observed in cyclic voltammetry experiments was assigned to the RuIII/II couple, E° (trans-[Ru(phen-NH-phen)(eina)2)3+/2+ = +1.22 V versus Ag/AgCl. The trans-[Ru(phen-NH-phen)(ina)2](PF6)2 compound was found to bind to nanocrystalline TiO2 thin films from acetonitrile solution. Pulsed 532 nm excitation of trans-[Ru(phen-NH-phen)(ina)2](PF6)2 anchored to mesoporous nanocrystalline TiO2 thin films resulted in an absorption difference spectra consistent with the formation of an interfacial charge separated state trans-[RuIII (phen-NH-phen)(ina)2]+/TiO2 (e−). The formation of this state could not be time resolved, consistent with rapid excited state injection into the TiO2, kinj > 108 s−1. Comparative measurements with a thin film actinometer yielded an injection quantum yield (?inj) of 0.8. Charge recombination required milliseconds for completion and followed a bi-second-order equal concentration kinetic model with k1 = 1.0 × 108 s−1, and k2 = 3.0 × 105 s−1. In regenerative solar cells with 0.5 M LiI and 0.005 M I2 in acetonitrile, incident photon-to-current efficiencies were typically less than 10%. 相似文献
15.
Maren Pink Pierre Sutra Vincenzo BalzaniMargherita Venturi Sebastiano CampagnaScolastica Serroni Alberto Juris 《Inorganica chimica acta》2002,333(1):25-31
The structure and reactivity of the complex [Ru(2,3-Medpp)2Cl2](PF6)2 (2,3-Medpp+=2-[2-(1-methylpyridiniumyl)]-3-(2-pyridyl)pyrazine) was investigated by X-ray diffraction (XRD), 1H NMR, redox, and UV-Vis absorption measurements. X-ray analysis shows that crystals obtained from an acetonitrile-toluene solution contain the trans-Cl2, trans-pyrazine isomeric form, while 1H NMR and redox measurements on the main product of the synthetic workup indicate the presence of the trans-Cl2, cis-pyrazine isomer. In the dark at 70 °C, the complex [Ru(2,3-Medpp)2Cl2]2+ reacts slowly in acetonitrile isomerizing to the cis-[Ru(2,3-Medpp)2(CH3CN)Cl]3+ species. Under ambient light in the presence of excess AgNO3 the cis-[Ru(2,3-Medpp)2(CH3CN)2]4+ species is obtained. 相似文献
16.
Patrick BippusMatthias Skocic Michael A. JakupecBernhard K. Keppler Fabian Mohr 《Journal of inorganic biochemistry》2011,105(3):462-466
The thiocarbamates 4-RC6H4NHC(S)NR2′ (R = H, Cl; R′ = Me, Et), 4-ClC6H4NHC(S)NR (NR = 2-pyridylpiperazine) react with cis-[PtCl2(PTA)2] (PTA = 1,3,5-triaza-7-phosphaadamantane) in the presence of base to afford the monocationic platinum(II) complexes cis-[Pt{SC(NR2′) = NC6H4R}(PTA)2]+ (R = H, Cl; R′ = Me, Et), cis-[Pt{SC(NR) = NC6H4Cl}(PTA)2]+ (NR = 2-pyridylpiperazine), which were isolated as their PF6 salts in high yields. The complexes were fully characterised spectroscopically and also by X-ray crystallography. Cytotoxicity of these complexes was studied in vitro in three human cancer cell lines (CH1, A549 and SW480) using the MTT assay. 相似文献
17.
The behaviour of the bis-chelated oxovanadium(IV) complexes formed by acetylacetone (acac) and five of its derivatives was re-examined through a combination of spectroscopic methods in different solvents. It has been found that the complexes are penta-coordinated with a geometry close to the square pyramid and maintain in solution the same structure as in the solid state. The results rule out a cis-trans isomerism of the species VOL2S (L = acac or derivative, S = solvent) in solution. Depending on the coordinating ability of the solvent a sixth molecule can be bound, more or less strongly, to the free axial position of the complexes. The combined application of the electronic absorption and IR spectroscopies allows to establish if the complexes in solution are penta- or hexa-coordinated. 相似文献
18.
M. Belén Tarallo Antonio Monge Ronny R. Ribeiro Roberto C. Mercader Clarice Q.F. Leite Dinorah Gambino 《Journal of inorganic biochemistry》2010,104(11):1164-1170
In the search for new therapeutic tools against tuberculosis two novel iron complexes, [Fe(L-H)3], with 3-aminoquinoxaline-2-carbonitrile N1,N4-dioxide derivatives (L) as ligands, were synthesized, characterized by a combination of techniques, and in vitro evaluated. Results were compared with those previously reported for two analogous iron complexes of other ligands of the same family of quinoxaline derivatives. In addition, the complexes were studied by cyclic voltammetry and EPR spectroscopy. Cyclic voltammograms of the iron compounds showed several cathodic processes which were attributed to the reduction of the metal center (Fe(III)/Fe(II)) and the coordinated ligand. EPR signals were characteristic of magnetically isolated high-spin Fe(III) in a rhombic environment and arise from transitions between mS = ± 1/2 (geff ~ 9) or mS = ± 3/2 (geff ~ 4.3) states. Mössbauer experiments showed hyperfine parameters that are typical of high-spin Fe(III) ions in a not too distorted environment. The novel complexes showed in vitro growth inhibitory activity on Mycobacterium tuberculosis H37Rv (ATCC 27294), together with very low unspecific cytotoxicity on eukaryotic cells (cultured murine cell line J774). Both complexes showed higher inhibitory effects on M. tuberculosis than the “second-line” therapeutic drugs. 相似文献
19.
W.Gregory Jackson A.F.M.Mokhlesur Rahman M.Anthony Wong 《Inorganica chimica acta》2004,357(3):665-676
The synthesis and characterisation of cis- and trans-[Co(tmen)2(NCCH3)2](ClO4)3 are described. Solvolysis rates have been measured by both 1H NMR spectroscopy and UV-Vis spectrophotometry in dimethyl sulfoxide at 298.2 K. The cis isomer undergoes solvolysis by consecutive first-order reactions, k1=5.61 × 10−4 and k2=5.35 × 10−4 s−1, each with steric retention. The measured solvolysis rate (single step reaction) for the trans isomer is k=1.54 × 10−5 s−1. The solvent exchange rates have been measured by 1H NMR spectroscopy in CD3CN at 298.2 K: kex(cis)=kct + kcc=2.0 × 10−5 and kex(trans)=ktc + ktt=4.56 × 10−6 s−1. From these data, the measured cis-trans isomerisation rate (1.71 × 10−6 s−1) and equilibrium position in CH3CN (17% trans), the steric course for substitution in the exchange processes has been determined: trans reactant - 69% trans product; cis reactant - 99% cis product. Aquation rates for cis- and trans-[Co(tmen)2(NCCH3)2](ClO4)3 have also been determined spectrophotometrically and by NMR; kcis=1.3 × 10−4 and ktrans=2.7 × 10−5 s−1. In both cases the steric course for the primary aquation step is indeterminate because the subsequent steps are faster. Where data are available, the [Co(tmen)2X2]n+ complexes are found to be consistently much more reactive than their [Co(en)2X2]n+ analogues. 相似文献
20.
A two-dimensional copper(II) polymer with formula of [Cu4(H2O)4(dmapox)2(btc)]n · 10nH2O, where dmapox is the dianion of N,N′-bis[3-(dimethylamino)propyl]oxamide and btc is the tetra-anion of 1,2,4,5-benzenetetracarboxylic acid, was synthesized and characterized by elemental analysis, conductivity measurement, IR and electronic spectral studies. The crystal structure of the complex has been determined by X-ray single-crystal diffraction. The structure consists of crystallized water molecules and neutral two-dimensional copper(II) coordination polymeric networks constructed both by the bis-tridentate μ-trans-dmapox and tetra-monodentate μ4-btc bridging ligands. Each btc ligand links four trans-dmapox-bridged binuclear copper(II) building blocks [Cu2(H2O)2(trans-dmapox)]2+ and each binuclear copper(II) building block attaches to two btc ligands forming an infinite 2D layer which consists of 4+4 grids with dimensions of 13.563(5) × 15.616(5) Å. The environment around the copper(II) atom can be described as a distorted square-pyramid and the Cu?Cu separations through μ-trans-dmapox and μ4-btc bridging ligands are 5.225 Å (Cu1-Cu1i), 5.270 Å (Cu2-Cu2ii), 6.115 Å (Cu1-Cu2), 9.047 Å (Cu1-Cu2iii) and 10.968 Å (Cu1-Cu1iii), respectively. Abundant hydrogen bonds among the crystallized, the coordinated water molecules, and the uncoordinated carboxyl oxygen atoms cross-link the two-dimensional layers into an overall three-dimensional channel-like framework. The interaction of the copper(II) polymer with calf thymus DNA (CT-DNA) has been investigated by using absorption, emission spectral and electrochemical techniques. The results indicate that the copper(II) polymer interacts with DNA strongly (Kb = 4.8 × 105 M−1 and Ksv = 1.1 × 104) and the interaction mode between the copper(II) polymer and DNA may be the groove binding. To the best of our knowledge, this is the first report about the crystal structure and DNA-binding studies of a two-dimensional copper(II) polymer bridged both by the trans-oxamidate and btc ligands. 相似文献