A dinuclear complex [DyFe(CN)6(DMF)4(H2O)3]·1.25H2O (DMF=N, N dimethylformamide) 1 based on the cyanide as linkage was prepared and structurally characterized by X ray single crystal structure analysis. The Dy?io...A dinuclear complex [DyFe(CN)6(DMF)4(H2O)3]·1.25H2O (DMF=N, N dimethylformamide) 1 based on the cyanide as linkage was prepared and structurally characterized by X ray single crystal structure analysis. The Dy?ion is eight coordinations in a square antiprism arrangement and the Fe?ion is six coordinations oriented octahedrally. The neutral units [DyFe(CN)6(DMF)4(H2O)3] are held together by hydrogen bonds formed by lattice water molecules, coordinated water molecules and nitrogen atoms of cyanide coming from other distinct complex units to afford a three dimensional framework. CCDC: 192314.展开更多
The binuclear complex [Cu2(TS)(H2O)]·CH3OH , where TS denotes the binucleating ligand derived from the schiff base N,N′ bis(3 carboxylsalidene)trimethylenediamine, was obtained from the self decomposition of mon...The binuclear complex [Cu2(TS)(H2O)]·CH3OH , where TS denotes the binucleating ligand derived from the schiff base N,N′ bis(3 carboxylsalidene)trimethylenediamine, was obtained from the self decomposition of mononuclear complex Na2CuTS·H2O. It crystallizes in the monoclinic system, space group P21/c. The lattice parameters are a=11.935(2)?,b=15.667(3)?,c=11.621(2)?,β=111.60(3)°,V=2020.2(7)?3, Z=4 with R=0.0467. The structure is made of binuclear units, in which two copper atoms are bridged by two phenolic oxygen atoms. The "inside"copper atom is coordinated by two nitrogens, two phenolic oxygens in a planar coordination site, the copper atom deviates from the mean plane by 0.47?. The "outside"copper atom is five coordinated by two phenolic oxygen atoms?two equatorial carboxyl oxygen atoms and one axial water oxygen atom in a distorted tetragonal cone site, the copper atom is pulled out of the equatorial plane by 0.46?.展开更多
A Series of mono and di-nuclear Zn Ni complexes with 5 - chlorosalicylaldehyde -ethylenediamine Schiff base have been synthesized. Theirs compositions and structures were characterized by the elemental analysis.UV.IR ...A Series of mono and di-nuclear Zn Ni complexes with 5 - chlorosalicylaldehyde -ethylenediamine Schiff base have been synthesized. Theirs compositions and structures were characterized by the elemental analysis.UV.IR spectra and 1H NMR. The Dismutation to O2 free radical has also been investigated.展开更多
The formation of heterobimetallic ruthenium?complex was investigated by absorption and emission spectra. As an intercalator of DNA, the luminescent monometallic ruthenium?complex [Ru(bpy)2tpphz]2+could coordinate with...The formation of heterobimetallic ruthenium?complex was investigated by absorption and emission spectra. As an intercalator of DNA, the luminescent monometallic ruthenium?complex [Ru(bpy)2tpphz]2+could coordinate with Zn2+to form the nonluminescent heterobimetallic complex [Ru(bpy)2(tpphz)Zn]4+. The emission intensity of complex decreased as increasing the amounts of Zn2+and the luminescence was almost lost at the ratio of / of 1. After binding to DNA, the peripheral coordination site on the tpphz ligand remained accessible for Zn2+, the coordination occurred from the oppsite side of helix with respect to intercalated [Ru(bpy)2tpphz]2+and the nonluminescent heterobimetallic complex was formed. On the other hand, the [Ru(bpy)2(tpphz)Zn]4+also bound to DNA by intercalation and situated the region of the intercalated [Ru(bpy)2tpphz]2+between the base pairs of DNA. The complex looked like a molecular nut (the Zn2+) and bolt (the [Ru(bpy)2tpphz]2+).展开更多
This paper reports the biomimetic catalytic properties of new Schiff base mononuclear complexes MH 2L｛M = Mn(Ⅱ), Fe(Ⅲ)Cl, Cr(Ⅲ)Cl, Cu(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Zn(Ⅱ); L=bis[ N,N′-ethylene-2,2′-(phenylmethylene)bis(3...This paper reports the biomimetic catalytic properties of new Schiff base mononuclear complexes MH 2L｛M = Mn(Ⅱ), Fe(Ⅲ)Cl, Cr(Ⅲ)Cl, Cu(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Zn(Ⅱ); L=bis[ N,N′-ethylene-2,2′-(phenylmethylene)bis(3,4-dimethylpyrrole-5-aldimino)]｝and dinuclear complexes MnML[M=Mn(Ⅱ), Fe(Ⅲ)Cl, Cr(Ⅲ)Cl, Cu(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Zn(Ⅱ)] for studying the monooxygenation of cyclohexane with PhIO and magnetic properties of the dinuclear complexes. The investigation of the magnetic properties(4—300 K) of the dinuclear complexes revealed that their antiferromagnetic spin exchange with J varied from -10.49 to -0.482 cm -1 except MnZnL, and antiferromagnetic spin exchange decreased in the order: Mn(Ⅱ)-Cu(Ⅱ)>Mn(Ⅱ)-Ni(Ⅱ)>Mn(Ⅱ)-Mn(Ⅱ)>Mn(Ⅱ)- Fe(Ⅲ)>Mn(Ⅱ)-Co(Ⅱ)>Mn(Ⅱ)-Cr(Ⅲ). The yield determination of monooxygenation of cyclohexane indicated that the catalytic reactivity of the dinuclear complex was better than that of the corresponding mononuclear complex, so we supposed that there was some cooperative action between the two metals in these dinuclear complexes. It was found that the cooperation lay in the decreasing order: Mn-{Fe>}Mn-Cr>Mn-Cu>Mn-Mn>Mn-Co>Mn-Ni>Mn-Zn. It seems that this cooperation increased with the increase of the number of unpaired d electrons and the magnetic exchange between the two metals in these dinuclear complexes.展开更多
文摘A dinuclear complex [DyFe(CN)6(DMF)4(H2O)3]·1.25H2O (DMF=N, N dimethylformamide) 1 based on the cyanide as linkage was prepared and structurally characterized by X ray single crystal structure analysis. The Dy?ion is eight coordinations in a square antiprism arrangement and the Fe?ion is six coordinations oriented octahedrally. The neutral units [DyFe(CN)6(DMF)4(H2O)3] are held together by hydrogen bonds formed by lattice water molecules, coordinated water molecules and nitrogen atoms of cyanide coming from other distinct complex units to afford a three dimensional framework. CCDC: 192314.
文摘The binuclear complex [Cu2(TS)(H2O)]·CH3OH , where TS denotes the binucleating ligand derived from the schiff base N,N′ bis(3 carboxylsalidene)trimethylenediamine, was obtained from the self decomposition of mononuclear complex Na2CuTS·H2O. It crystallizes in the monoclinic system, space group P21/c. The lattice parameters are a=11.935(2)?,b=15.667(3)?,c=11.621(2)?,β=111.60(3)°,V=2020.2(7)?3, Z=4 with R=0.0467. The structure is made of binuclear units, in which two copper atoms are bridged by two phenolic oxygen atoms. The "inside"copper atom is coordinated by two nitrogens, two phenolic oxygens in a planar coordination site, the copper atom deviates from the mean plane by 0.47?. The "outside"copper atom is five coordinated by two phenolic oxygen atoms?two equatorial carboxyl oxygen atoms and one axial water oxygen atom in a distorted tetragonal cone site, the copper atom is pulled out of the equatorial plane by 0.46?.
文摘A Series of mono and di-nuclear Zn Ni complexes with 5 - chlorosalicylaldehyde -ethylenediamine Schiff base have been synthesized. Theirs compositions and structures were characterized by the elemental analysis.UV.IR spectra and 1H NMR. The Dismutation to O2 free radical has also been investigated.
文摘The formation of heterobimetallic ruthenium?complex was investigated by absorption and emission spectra. As an intercalator of DNA, the luminescent monometallic ruthenium?complex [Ru(bpy)2tpphz]2+could coordinate with Zn2+to form the nonluminescent heterobimetallic complex [Ru(bpy)2(tpphz)Zn]4+. The emission intensity of complex decreased as increasing the amounts of Zn2+and the luminescence was almost lost at the ratio of / of 1. After binding to DNA, the peripheral coordination site on the tpphz ligand remained accessible for Zn2+, the coordination occurred from the oppsite side of helix with respect to intercalated [Ru(bpy)2tpphz]2+and the nonluminescent heterobimetallic complex was formed. On the other hand, the [Ru(bpy)2(tpphz)Zn]4+also bound to DNA by intercalation and situated the region of the intercalated [Ru(bpy)2tpphz]2+between the base pairs of DNA. The complex looked like a molecular nut (the Zn2+) and bolt (the [Ru(bpy)2tpphz]2+).
文摘This paper reports the biomimetic catalytic properties of new Schiff base mononuclear complexes MH 2L｛M = Mn(Ⅱ), Fe(Ⅲ)Cl, Cr(Ⅲ)Cl, Cu(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Zn(Ⅱ); L=bis[ N,N′-ethylene-2,2′-(phenylmethylene)bis(3,4-dimethylpyrrole-5-aldimino)]｝and dinuclear complexes MnML[M=Mn(Ⅱ), Fe(Ⅲ)Cl, Cr(Ⅲ)Cl, Cu(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Zn(Ⅱ)] for studying the monooxygenation of cyclohexane with PhIO and magnetic properties of the dinuclear complexes. The investigation of the magnetic properties(4—300 K) of the dinuclear complexes revealed that their antiferromagnetic spin exchange with J varied from -10.49 to -0.482 cm -1 except MnZnL, and antiferromagnetic spin exchange decreased in the order: Mn(Ⅱ)-Cu(Ⅱ)>Mn(Ⅱ)-Ni(Ⅱ)>Mn(Ⅱ)-Mn(Ⅱ)>Mn(Ⅱ)- Fe(Ⅲ)>Mn(Ⅱ)-Co(Ⅱ)>Mn(Ⅱ)-Cr(Ⅲ). The yield determination of monooxygenation of cyclohexane indicated that the catalytic reactivity of the dinuclear complex was better than that of the corresponding mononuclear complex, so we supposed that there was some cooperative action between the two metals in these dinuclear complexes. It was found that the cooperation lay in the decreasing order: Mn-{Fe>}Mn-Cr>Mn-Cu>Mn-Mn>Mn-Co>Mn-Ni>Mn-Zn. It seems that this cooperation increased with the increase of the number of unpaired d electrons and the magnetic exchange between the two metals in these dinuclear complexes.
