Self-assembly of Zn（NO3）2·6H2O and 2,3,5,6-tetrabromoterephthalic acid（H2TBTA） gave rise to two new zinc metal-organic frameworks,Zn（HTBTA）2（phen）2·H2O（1） and Zn（TBTA）1/2（μ2-OH）（H2O）·0....Self-assembly of Zn（NO3）2·6H2O and 2,3,5,6-tetrabromoterephthalic acid（H2TBTA） gave rise to two new zinc metal-organic frameworks,Zn（HTBTA）2（phen）2·H2O（1） and Zn（TBTA）1/2（μ2-OH）（H2O）·0.25EtOH（2）.Complex 1 is a mononuclear molecule.The hydrogen bonding interactions further connect the mononuclear molecules to generate a 2D supramolecular architecture.Complex 2 is a 2D organic-inorganic hybrid layer framework constructed from 1D rod-shaped secondary building units.展开更多
Three indium metal-organic frameworks （In-MOFs）, [In（BTB）（2,2＇-bipy）]？NMP （1）, [In（BTB）（2,2＇-bipy）]？NMP？2H2O （2）, and [In（BTB）（NMP）]·0.5NMP （3）, have been constructed by the solvothermal ...Three indium metal-organic frameworks （In-MOFs）, [In（BTB）（2,2＇-bipy）]？NMP （1）, [In（BTB）（2,2＇-bipy）]？NMP？2H2O （2）, and [In（BTB）（NMP）]·0.5NMP （3）, have been constructed by the solvothermal reaction of In（NO3）3·5H2O and 1,3,5-benzenetribenzoic acid （H3BTB） in similar reaction conditions, and characterized by single-crystal X-ray crystallography, power X-ray diffraction （PXRD）, infrared spectroscopy （IR）, elemental analysis （EA） and thermogravimetry analysis （TGA）. Complex 1 bears a two-dimensional （2D） layered structure of 6,3-connected hcb net topology, and complexes 2 and 3 have 2-fold interpenetrating structures based on 6,3-connected layer, which display the same net topologies with the C3-symmetric H3BTB ligands as 3-connected linkers and the In（Ⅲ） ions as 6-connected nodes. Moreover, the fluorescent properties of 1～3 have also been studied.展开更多
本文以2,5-二溴对苯二甲酸(H_(2)BPTA)、吡嗪(Pyrazine)、N,N’-二甲基甲酰胺(D M F)和六水合硝酸锰(Mn(NO_(3))2·6H_(2)O)为原料,构筑了一种锰基金属有机框架物([Mn6(BPTA)5(Pyrazine)]·4DMF,Mn-MOF)。对Mn-MOF进行单晶X射...本文以2,5-二溴对苯二甲酸(H_(2)BPTA)、吡嗪(Pyrazine)、N,N’-二甲基甲酰胺(D M F)和六水合硝酸锰(Mn(NO_(3))2·6H_(2)O)为原料,构筑了一种锰基金属有机框架物([Mn6(BPTA)5(Pyrazine)]·4DMF,Mn-MOF)。对Mn-MOF进行单晶X射线衍射、元素分析、红外光谱、热重、粉末X射线衍射及荧光光谱等测试。单晶X射线衍射结果表明:Mn-MOF为三斜晶系,空间群为P1,中心离子Mn(Ⅱ)离子为五配位的扭曲六面体几何构型和六配位八面体几何构型,晶胞参数为a=9.4093(4)nm,b=11.4045(6)nm,c=11.4518(6)nm,α=67.016(5)°,β=75.810(4)°,γ=68.965(4)°,V=1048.02(10)nm3。荧光光谱分析表明,Mn-MOF在不同有机溶剂中表现出不同强度的发光特性。展开更多
The advent of the 5G era has stimulated the rapid development of high power electronics with dense integration.Three-dimensional(3D)thermally conductive networks,possessing high thermal and electrical conductivities a...The advent of the 5G era has stimulated the rapid development of high power electronics with dense integration.Three-dimensional(3D)thermally conductive networks,possessing high thermal and electrical conductivities and many different structures,are regarded as key materials to improve the performance of electronic devices.We provide a critical overview of carbonbased 3D thermally conductive networks,emphasizing their preparation-structure-property relationships and their applications in different scenarios.A detailed discussion of the microscopic principles of thermal conductivity is provided,which is crucial for increasing it.This is followed by an in-depth account of the construction of 3D networks using different carbon materials,such as graphene,carbon foam,and carbon nanotubes.Techniques for the assembly of two-dimensional graphene into 3D networks and their effects on thermal conductivity are emphasized.Finally,the existing challenges and future prospects for 3D carbon-based thermally conductive networks are discussed.展开更多
基金Supported by the NNSFC (20701025)the NSF of Shandong Province (Y2008B01),and Shandong University
文摘Self-assembly of Zn（NO3）2·6H2O and 2,3,5,6-tetrabromoterephthalic acid（H2TBTA） gave rise to two new zinc metal-organic frameworks,Zn（HTBTA）2（phen）2·H2O（1） and Zn（TBTA）1/2（μ2-OH）（H2O）·0.25EtOH（2）.Complex 1 is a mononuclear molecule.The hydrogen bonding interactions further connect the mononuclear molecules to generate a 2D supramolecular architecture.Complex 2 is a 2D organic-inorganic hybrid layer framework constructed from 1D rod-shaped secondary building units.
基金Supported by the National Natural Science Foundation of China(No.21371179,21201179)the Fundamental Research Funds for the Central Universities(14CX02213A,16CX05015A)the Foundation of State Key Laboratory of Structural Chemistry(20150026,20160006)
文摘Three indium metal-organic frameworks （In-MOFs）, [In（BTB）（2,2＇-bipy）]？NMP （1）, [In（BTB）（2,2＇-bipy）]？NMP？2H2O （2）, and [In（BTB）（NMP）]·0.5NMP （3）, have been constructed by the solvothermal reaction of In（NO3）3·5H2O and 1,3,5-benzenetribenzoic acid （H3BTB） in similar reaction conditions, and characterized by single-crystal X-ray crystallography, power X-ray diffraction （PXRD）, infrared spectroscopy （IR）, elemental analysis （EA） and thermogravimetry analysis （TGA）. Complex 1 bears a two-dimensional （2D） layered structure of 6,3-connected hcb net topology, and complexes 2 and 3 have 2-fold interpenetrating structures based on 6,3-connected layer, which display the same net topologies with the C3-symmetric H3BTB ligands as 3-connected linkers and the In（Ⅲ） ions as 6-connected nodes. Moreover, the fluorescent properties of 1～3 have also been studied.
文摘本文以2,5-二溴对苯二甲酸(H_(2)BPTA)、吡嗪(Pyrazine)、N,N’-二甲基甲酰胺(D M F)和六水合硝酸锰(Mn(NO_(3))2·6H_(2)O)为原料,构筑了一种锰基金属有机框架物([Mn6(BPTA)5(Pyrazine)]·4DMF,Mn-MOF)。对Mn-MOF进行单晶X射线衍射、元素分析、红外光谱、热重、粉末X射线衍射及荧光光谱等测试。单晶X射线衍射结果表明:Mn-MOF为三斜晶系,空间群为P1,中心离子Mn(Ⅱ)离子为五配位的扭曲六面体几何构型和六配位八面体几何构型,晶胞参数为a=9.4093(4)nm,b=11.4045(6)nm,c=11.4518(6)nm,α=67.016(5)°,β=75.810(4)°,γ=68.965(4)°,V=1048.02(10)nm3。荧光光谱分析表明,Mn-MOF在不同有机溶剂中表现出不同强度的发光特性。
文摘The advent of the 5G era has stimulated the rapid development of high power electronics with dense integration.Three-dimensional(3D)thermally conductive networks,possessing high thermal and electrical conductivities and many different structures,are regarded as key materials to improve the performance of electronic devices.We provide a critical overview of carbonbased 3D thermally conductive networks,emphasizing their preparation-structure-property relationships and their applications in different scenarios.A detailed discussion of the microscopic principles of thermal conductivity is provided,which is crucial for increasing it.This is followed by an in-depth account of the construction of 3D networks using different carbon materials,such as graphene,carbon foam,and carbon nanotubes.Techniques for the assembly of two-dimensional graphene into 3D networks and their effects on thermal conductivity are emphasized.Finally,the existing challenges and future prospects for 3D carbon-based thermally conductive networks are discussed.
