(2E,6E)-4-methyl-2,6-bis(pyridin-3-ylmethylene)cyclohexan-1-one(L_(1))and 4-methyl-2,6-bis[(E)-4-(pyridin-4-yl)benzylidene]cyclohexan-1-one(L_(2))were synthesized and combined with isophthalic acid(H_(2)IP),then under...(2E,6E)-4-methyl-2,6-bis(pyridin-3-ylmethylene)cyclohexan-1-one(L_(1))and 4-methyl-2,6-bis[(E)-4-(pyridin-4-yl)benzylidene]cyclohexan-1-one(L_(2))were synthesized and combined with isophthalic acid(H_(2)IP),then under solvothermal conditions,to react with transition metals achieving four novel metal-organic frameworks(MOFs):[Zn(IP)(L_(1))]_(n)(1),{[Cd(IP)(L_(1))]·H_(2)O}_(n)(2),{[Co(IP)(L_(1))]·H_(2)O}_(n)(3),and[Zn(IP)(L_(2))(H_(2)O)]_(n)(4).MOFs 1-4 have been characterized by single-crystal X-ray diffraction,powder X-ray diffraction,thermogravimetry,and elemental analysis.Single-crystal X-ray diffraction shows that MOF 1 crystallizes in the monoclinic crystal system with space group P2_(1)/n,and MOFs 2-4 belong to the triclinic system with the P1 space group.1-3 are 2D sheet structures,2 and 3 have similar structural characters,whereas 4 is a 1D chain structure.Furthermore,1-3 exhibited certain photocatalytic capability in the degradation of rhodamine B(Rh B)and pararosaniline hydrochloride(PH).4could be used as a heterogeneous catalyst for the Knoevenagel reaction starting with benzaldehyde derivative and malononitrile.4 could promote the reaction to achieve corresponding products in moderate yields within 3 h.Moreover,the catalyst exhibited recyclability for up to three cycles without significantly dropping its activity.A mechanism for MOF 4 catalyzed Knoevenagel condensation reaction of aromatic aldehyde and malononitrile has been initially proposed.CCDC:2356488,1;2356497,2;2356499,3;2356498,4.展开更多
Preparing multifunctional coatings with both anti-corrosion and anti-biofouling properties is crucial.Copper has been in the spotlight as an effective biocide,especially in the recent past concerning its impact on cau...Preparing multifunctional coatings with both anti-corrosion and anti-biofouling properties is crucial.Copper has been in the spotlight as an effective biocide,especially in the recent past concerning its impact on causing environmental hazards.Reducing the amount used and increasing its efficiency have become the focus of researchers.The hybridization of titanium dioxide nanoparticles(NPs)with copper metal-organic frameworks(MOFs)can significantly improve antimicrobial performance due to its photocatalytic properties.Composites(TiO_(2)-Cu-BTC)of titanium dioxide nanoparticles and copper 1,3,5-benzenetricarboxylate acid(Cu-BTC),obtained by three up-sampling methods,namely hydrothermal,mechanical stirring,and in-situ growth,were doped into epoxy resin(TiO_(2)-Cu-BTC/EP)to enhance its anticorrosion and antifouling properties.The loaded forms were determined by field emission scanning electron microscopy and confirmed using Fourier infrared spectroscopy and X-ray diffraction spectroscopy.The lethality of the composite coating against Escherichia coli(E.coli)increased by 12%after 3 h of exposure to light,and the impedance value increased by 1×1010Ω.The efficiency of the coating was greatly improved.展开更多
文摘(2E,6E)-4-methyl-2,6-bis(pyridin-3-ylmethylene)cyclohexan-1-one(L_(1))and 4-methyl-2,6-bis[(E)-4-(pyridin-4-yl)benzylidene]cyclohexan-1-one(L_(2))were synthesized and combined with isophthalic acid(H_(2)IP),then under solvothermal conditions,to react with transition metals achieving four novel metal-organic frameworks(MOFs):[Zn(IP)(L_(1))]_(n)(1),{[Cd(IP)(L_(1))]·H_(2)O}_(n)(2),{[Co(IP)(L_(1))]·H_(2)O}_(n)(3),and[Zn(IP)(L_(2))(H_(2)O)]_(n)(4).MOFs 1-4 have been characterized by single-crystal X-ray diffraction,powder X-ray diffraction,thermogravimetry,and elemental analysis.Single-crystal X-ray diffraction shows that MOF 1 crystallizes in the monoclinic crystal system with space group P2_(1)/n,and MOFs 2-4 belong to the triclinic system with the P1 space group.1-3 are 2D sheet structures,2 and 3 have similar structural characters,whereas 4 is a 1D chain structure.Furthermore,1-3 exhibited certain photocatalytic capability in the degradation of rhodamine B(Rh B)and pararosaniline hydrochloride(PH).4could be used as a heterogeneous catalyst for the Knoevenagel reaction starting with benzaldehyde derivative and malononitrile.4 could promote the reaction to achieve corresponding products in moderate yields within 3 h.Moreover,the catalyst exhibited recyclability for up to three cycles without significantly dropping its activity.A mechanism for MOF 4 catalyzed Knoevenagel condensation reaction of aromatic aldehyde and malononitrile has been initially proposed.CCDC:2356488,1;2356497,2;2356499,3;2356498,4.
基金Project(52073311) supported by the National Natural Science Foundation of ChinaProject(2023A0505010011) supported by the Guangdong-Hong Kong-Macao Joint Innovation Field Research Foundation,ChinaProject(2021A1515012281) supported by the Guangdong Basic and Applied Basic Research Foundation,China。
文摘Preparing multifunctional coatings with both anti-corrosion and anti-biofouling properties is crucial.Copper has been in the spotlight as an effective biocide,especially in the recent past concerning its impact on causing environmental hazards.Reducing the amount used and increasing its efficiency have become the focus of researchers.The hybridization of titanium dioxide nanoparticles(NPs)with copper metal-organic frameworks(MOFs)can significantly improve antimicrobial performance due to its photocatalytic properties.Composites(TiO_(2)-Cu-BTC)of titanium dioxide nanoparticles and copper 1,3,5-benzenetricarboxylate acid(Cu-BTC),obtained by three up-sampling methods,namely hydrothermal,mechanical stirring,and in-situ growth,were doped into epoxy resin(TiO_(2)-Cu-BTC/EP)to enhance its anticorrosion and antifouling properties.The loaded forms were determined by field emission scanning electron microscopy and confirmed using Fourier infrared spectroscopy and X-ray diffraction spectroscopy.The lethality of the composite coating against Escherichia coli(E.coli)increased by 12%after 3 h of exposure to light,and the impedance value increased by 1×1010Ω.The efficiency of the coating was greatly improved.
