Five complexes of copper and lanthanide series containing iminodiacetic group Hgands have been synthesized and investigated. The structures of three compounds have been determined by X-ray single crystal diffraction. ...Five complexes of copper and lanthanide series containing iminodiacetic group Hgands have been synthesized and investigated. The structures of three compounds have been determined by X-ray single crystal diffraction. Their vibrational spectra have been measured and assigned rationally.展开更多
The compound 2,4,4,9,11,11-hexamethyl-1,5,8,12-tetraazacyclotetradecane-1,8-diene(1) was synthesized by new method with high yield(95.2%),and its complex with Cu(II) and SCN-was also obtained.The structures of both th...The compound 2,4,4,9,11,11-hexamethyl-1,5,8,12-tetraazacyclotetradecane-1,8-diene(1) was synthesized by new method with high yield(95.2%),and its complex with Cu(II) and SCN-was also obtained.The structures of both the ligand and the complex were characterized by IR,elemental analysis,and X-ray diffraction.The crystal of the title compound(2) belongs to monoclinic system,space group P21/n,Mr=501.53,a=1.28883(11) nm,b=1.13462(10) nm,c=1.58128(13) nm,β=102.7430(10)°,V=2.2554(3) nm3,Z=4,d=1.477g/ cm3,F(000)=1052.R1=0.0360,wR2=0.0976[I>2σ(Ⅰ)].The copper atom is five–coordinated with four nitrogen atoms from compound 1 and one nitrogen atom from thiocyanate to form a tetragonal pyramid structure.展开更多
A new type of three-dimensional open-framework copper chloride,prepared simply by the hydrothermal treatment of CuCl2·H2O and melamine,is built up from unusual chloride bridged｛Cu4Cl4｝distorted cubane units con...A new type of three-dimensional open-framework copper chloride,prepared simply by the hydrothermal treatment of CuCl2·H2O and melamine,is built up from unusual chloride bridged｛Cu4Cl4｝distorted cubane units connected by sharing copper cations and has voids in the framework.Each Cu with six Cl atoms forms the distorted octahedron.The crystal is triclinic,Space group Pī,lattice parameters,a=6.1020（12）?,b=6.7860（14）?,c=9.0570（18）?,α=89.67（3）°,β=80.15（3）°,γ=89.45（3）°,V=369^49（13）?3,Z=2,Dc=2.417g·cm-3,F（000）=252,R1=0.0922,and wR2=0.2720.展开更多
In order to clarify the interaction between copper and wood substances in wood treated with copper containing water-borne wood preservatives, the dielectric constant ε＇ and dielectric loss factor ε＂ of untreated w...In order to clarify the interaction between copper and wood substances in wood treated with copper containing water-borne wood preservatives, the dielectric constant ε＇ and dielectric loss factor ε＂ of untreated wood and wood treated with four concentration levels of copper-ethanolamine （Cu-EA） solutions were determined within a temperature range from -100 to 40℃ and a frequency range from 100 to 1 MHz. Three dielectric relaxation processes were observed in the ε＂ spectrum; among them R-Ⅰ is based on the reorientation ofmethylol groups in the amorphous region of wood cell walls and R-Ⅱ is related to wood extractives. R-Ⅲ appeared in Cu-EA treated wood, and its magnitude decreases with the concentration of Cu-EA solutions used in this experiment. This relaxation process was considered to be based on the reorientation of copper-ethanolamine-wood complexes in wood cell walls. At low copper retention, the hydrogen in the complex can form hydrogen bonding with adjacent hydroxyl groups, which results in a strong bonding state between copper and wood; at high copper retention, the numerous copper-ethanolamine complexes not only hinder them from forming hydrogen bonding with adjacent wood molecules due to steric hindrance, but also weaken the interaction between wood molecules themselves, which corresponds to reducing ε＂ values of both R-Ⅰ and R-Ⅲ processes. The results explain the fact of increasing copper leaching in wood treated with high concentration copper-based water-borne preservatives.展开更多
文摘Five complexes of copper and lanthanide series containing iminodiacetic group Hgands have been synthesized and investigated. The structures of three compounds have been determined by X-ray single crystal diffraction. Their vibrational spectra have been measured and assigned rationally.
文摘The compound 2,4,4,9,11,11-hexamethyl-1,5,8,12-tetraazacyclotetradecane-1,8-diene(1) was synthesized by new method with high yield(95.2%),and its complex with Cu(II) and SCN-was also obtained.The structures of both the ligand and the complex were characterized by IR,elemental analysis,and X-ray diffraction.The crystal of the title compound(2) belongs to monoclinic system,space group P21/n,Mr=501.53,a=1.28883(11) nm,b=1.13462(10) nm,c=1.58128(13) nm,β=102.7430(10)°,V=2.2554(3) nm3,Z=4,d=1.477g/ cm3,F(000)=1052.R1=0.0360,wR2=0.0976[I>2σ(Ⅰ)].The copper atom is five–coordinated with four nitrogen atoms from compound 1 and one nitrogen atom from thiocyanate to form a tetragonal pyramid structure.
文摘A new type of three-dimensional open-framework copper chloride,prepared simply by the hydrothermal treatment of CuCl2·H2O and melamine,is built up from unusual chloride bridged｛Cu4Cl4｝distorted cubane units connected by sharing copper cations and has voids in the framework.Each Cu with six Cl atoms forms the distorted octahedron.The crystal is triclinic,Space group Pī,lattice parameters,a=6.1020（12）?,b=6.7860（14）?,c=9.0570（18）?,α=89.67（3）°,β=80.15（3）°,γ=89.45（3）°,V=369^49（13）?3,Z=2,Dc=2.417g·cm-3,F（000）=252,R1=0.0922,and wR2=0.2720.
基金supported by the National Natural Science Foundation of China(51603185,51673174)Zhejiang Provincial Natural Science Foundation of China(LQ19E030016,LY19E030006,LZ17E030001)+1 种基金China Postdoctoral Science Foundation(2018M632498)the Zhejiang Provincial Postdoctoral fellowship,China(Z71101009)~~
文摘In order to clarify the interaction between copper and wood substances in wood treated with copper containing water-borne wood preservatives, the dielectric constant ε＇ and dielectric loss factor ε＂ of untreated wood and wood treated with four concentration levels of copper-ethanolamine （Cu-EA） solutions were determined within a temperature range from -100 to 40℃ and a frequency range from 100 to 1 MHz. Three dielectric relaxation processes were observed in the ε＂ spectrum; among them R-Ⅰ is based on the reorientation ofmethylol groups in the amorphous region of wood cell walls and R-Ⅱ is related to wood extractives. R-Ⅲ appeared in Cu-EA treated wood, and its magnitude decreases with the concentration of Cu-EA solutions used in this experiment. This relaxation process was considered to be based on the reorientation of copper-ethanolamine-wood complexes in wood cell walls. At low copper retention, the hydrogen in the complex can form hydrogen bonding with adjacent hydroxyl groups, which results in a strong bonding state between copper and wood; at high copper retention, the numerous copper-ethanolamine complexes not only hinder them from forming hydrogen bonding with adjacent wood molecules due to steric hindrance, but also weaken the interaction between wood molecules themselves, which corresponds to reducing ε＂ values of both R-Ⅰ and R-Ⅲ processes. The results explain the fact of increasing copper leaching in wood treated with high concentration copper-based water-borne preservatives.
