Functional materials with multiple properties are urgent to be explored to reach high requirements for applications nowadays.In this work,a new multifunctional one-dimensional(1D)chain compound[N(C_(3)H_(7))_(4)][Cu(o...Functional materials with multiple properties are urgent to be explored to reach high requirements for applications nowadays.In this work,a new multifunctional one-dimensional(1D)chain compound[N(C_(3)H_(7))_(4)][Cu(ohpma)]·H_(2)O 1(ohpma=deprotonated N-(2-hydoxyphenyl)oxamic acid)exhibiting both 1D antiferromagnetic and nonlinear optical properties,which are both originated from the same polar[Cu(C_(8)H_(4)NO_(4))]magnetic units,has been successfully synthesized by evaporation at room temperature.Bis-polydentate nature of the(ohpma)3−ligand with constrained tridentate and bidentate coordination sites conducts Cu^(2+)ions coordinating in different geometries and forms 1D chains along the c axis,which are further separated by the[N(C_(3)H_(7))_(4)]+cations.And the 1D magnetic chains further exhibit noncentrosymmetric polar arrangement.Nonlinear optical study shows polar compound 1 exhibits a discernible second-harmonic generation(SHG)efficiency and the calculation of the partial density of states indicates that the SHG efficiency of 1 is mainly originated from the polar[Cu(C_(8)H_(4)NO_(4))]magnetic units.Moreover,magnetic susceptibility shows a broad maximum around 70 K with strong intrachain interaction of J/k B=−113.0 K but no long-range order is observed down to 2 K,suggesting that 1 shows a good 1D magnetism.Both good 1D magnetism and SHG activity suggest that 1 could be as a potential multifunctional material,particularly.展开更多
A new one-dimensional(1D)chain antiferromagnet Co(ox)(bib)·H_(2)O 1(ox=oxalate;bib=1,4-bis(imidazole-1-yl)benzene)has been successfully synthesized under hydrothermal condition and characterized by single crystal...A new one-dimensional(1D)chain antiferromagnet Co(ox)(bib)·H_(2)O 1(ox=oxalate;bib=1,4-bis(imidazole-1-yl)benzene)has been successfully synthesized under hydrothermal condition and characterized by single crystal X-ray crystallography,powder X-ray diffraction,thermogravimetric analysis,Fourier transform infrared(FTIR)spectroscopy,magnetic susceptibility,and heat capacity measurements.The CoII ion is connected by oxalate ions in trans-configuration to form 1D CoII–ox–CoII spin chains,which are further separated by the long organic molecule bib.The magnetic susceptibility curve shows that 1 exhibits a feature of broad maximum around 29 K,indicating strong antiferromagnetic interactions with short spin–spin correlations along the spin chains.However,no long-range order is observed due to the negligible interchain interactions through bib ligand and weak hydrogen bonds,which is further confirmed by the heat capacity data.The intrachain interaction J of−8.4 K is estimated.Both magnetic susceptibility and heat capacity results indicate that 1 exhibits a good 1D magnetism.展开更多
基金supported by the National Natural Science Foundation of China(NSFC,No.22101091)the Fundamental Research Funds for the Central Universities(No.2019kfyXKJC016)the Innovation and Talent Recruitment Base of New Energy Chemistry and Device(No.B210003),Knowledge Innovation Program of Wuhan-Basic Research.
文摘Functional materials with multiple properties are urgent to be explored to reach high requirements for applications nowadays.In this work,a new multifunctional one-dimensional(1D)chain compound[N(C_(3)H_(7))_(4)][Cu(ohpma)]·H_(2)O 1(ohpma=deprotonated N-(2-hydoxyphenyl)oxamic acid)exhibiting both 1D antiferromagnetic and nonlinear optical properties,which are both originated from the same polar[Cu(C_(8)H_(4)NO_(4))]magnetic units,has been successfully synthesized by evaporation at room temperature.Bis-polydentate nature of the(ohpma)3−ligand with constrained tridentate and bidentate coordination sites conducts Cu^(2+)ions coordinating in different geometries and forms 1D chains along the c axis,which are further separated by the[N(C_(3)H_(7))_(4)]+cations.And the 1D magnetic chains further exhibit noncentrosymmetric polar arrangement.Nonlinear optical study shows polar compound 1 exhibits a discernible second-harmonic generation(SHG)efficiency and the calculation of the partial density of states indicates that the SHG efficiency of 1 is mainly originated from the polar[Cu(C_(8)H_(4)NO_(4))]magnetic units.Moreover,magnetic susceptibility shows a broad maximum around 70 K with strong intrachain interaction of J/k B=−113.0 K but no long-range order is observed down to 2 K,suggesting that 1 shows a good 1D magnetism.Both good 1D magnetism and SHG activity suggest that 1 could be as a potential multifunctional material,particularly.
基金supported by the National Natural Science Foundation of China(Nos.22101091 and 21901078)the fund of the State Key Laboratory of Solidification Processing in NWPU(No.SKLSP202016)+1 种基金the Innovation and Talent Recruitment Base of New Energy Chemistry and Device(No.B210003)Knowledge Innovation Program of Wuhan-Basic Research.
文摘A new one-dimensional(1D)chain antiferromagnet Co(ox)(bib)·H_(2)O 1(ox=oxalate;bib=1,4-bis(imidazole-1-yl)benzene)has been successfully synthesized under hydrothermal condition and characterized by single crystal X-ray crystallography,powder X-ray diffraction,thermogravimetric analysis,Fourier transform infrared(FTIR)spectroscopy,magnetic susceptibility,and heat capacity measurements.The CoII ion is connected by oxalate ions in trans-configuration to form 1D CoII–ox–CoII spin chains,which are further separated by the long organic molecule bib.The magnetic susceptibility curve shows that 1 exhibits a feature of broad maximum around 29 K,indicating strong antiferromagnetic interactions with short spin–spin correlations along the spin chains.However,no long-range order is observed due to the negligible interchain interactions through bib ligand and weak hydrogen bonds,which is further confirmed by the heat capacity data.The intrachain interaction J of−8.4 K is estimated.Both magnetic susceptibility and heat capacity results indicate that 1 exhibits a good 1D magnetism.
