The complexes 1-4 of cyclobutanocucurbit[5]uril(CyB5Q[5])with Na^(+)/K^(+)have been synthesized and characterized by single-crystal X-ray diffraction.The results show that although the inorganic salts are used when th...The complexes 1-4 of cyclobutanocucurbit[5]uril(CyB5Q[5])with Na^(+)/K^(+)have been synthesized and characterized by single-crystal X-ray diffraction.The results show that although the inorganic salts are used when the cations are the same and the anions are different,in complex 1,Na^(+)closes one port of CyB5Q[5]through Na—O seven coordination bonds to form a molecular bowl;in complex 3,Na^(+)completely closes the two ports of CyB5Q[5]to form a molecular capsule with six Na—O coordination bonds;in complexes 2 and 4,the two ports of CyB5Q[5]are completely closed to form K—O coordinated molecular capsules,but the K^(+)of complex 2 is six-coordinated and that of complex 4 is eight-/nine-coordinated.and complex 4 are connected by three oxygen bridges to form a 1D molecular chain.CCDC:2457122,1;2457121,2;2457400,3;2457120,4.展开更多
Three copper(Ⅱ),nickel and cadmium(Ⅱ)complexes,namely[Cu_(2)(μ-H2dbda)2(phen)2]·2H_(2)O(1),[Ni(μ-H2dbda)(μ-bpb)(H_(2)O)2]n(2),and[Cd(μ-H2dbda)(μ-bpa)]n(3),have been constructed hydrothermally using H4dbda(...Three copper(Ⅱ),nickel and cadmium(Ⅱ)complexes,namely[Cu_(2)(μ-H2dbda)2(phen)2]·2H_(2)O(1),[Ni(μ-H2dbda)(μ-bpb)(H_(2)O)2]n(2),and[Cd(μ-H2dbda)(μ-bpa)]n(3),have been constructed hydrothermally using H4dbda(4,4'-dihydroxy-[1,1'-biphenyl]-3,3'-dicarboxylic acid),phen(1,10-phenanthroline),bpb(1,4-bis(pyrid-4-yl)benzene),bpa(bis(4-pyridyl)amine),and copper,nickel and cadmium chlorides at 160℃.The products were isolated as stable crystalline solids and were characterized by IR spectra,elemental analyses,thermogravimetric analyses,and singlecrystal X-ray diffraction analyses.Single-crystal X-ray diffraction analyses revealed that three complexes crystallize in the monoclinic P21/n,tetragonal I42d,and orthorhombic P21212 space groups.The complexes exhibit molecular dimers(1)or 2D metal-organic networks(2 and 3).The catalytic performances in the Knoevenagel reaction of these complexes were investigated.Complex 1 exhibits an effective catalytic activity and excellent reusability as a heterogeneous catalyst in the Knoevenagel reaction at room temperature.CCDC:2463800,1;2463801,2;2463802,3.展开更多
钴酸锂(LCO)电池凭借其高能量密度在锂离子电池市场占据中地位,然而废旧电池中大量存在的贵重金属元素对环境和经济都会造成巨大影响。因此,合理回收再利用对于资源可持续化有着重要意义。与现有的火法冶金和湿法冶金回收方法相比,直接...钴酸锂(LCO)电池凭借其高能量密度在锂离子电池市场占据中地位,然而废旧电池中大量存在的贵重金属元素对环境和经济都会造成巨大影响。因此,合理回收再利用对于资源可持续化有着重要意义。与现有的火法冶金和湿法冶金回收方法相比,直接再生法作为废旧钴酸锂最具潜力的回收策略。在这里,我们展示了一种直接再生工艺,不仅可以从废旧锂离子电池中回收LCO,还可以对其进行升级,强化结构稳定性,提升电化学性能。在回收过程中,基于废LCO与NiF_(2)和Li_(2)CO_(3)混合物之间的直接反应,在此过程中,F和Ni进入LCO体相内,形成双掺杂后的HV-LCO。升级后的HV-LCO在4.6 V高压下具有优异的倍率性能(1 C克容量为207.2 mA h·g^(-1),10C克容量为137.54 mA h·g^(-1))、良好的高倍率长循环性能(5C初始克容量为193.2mA h·g^(-1),200次循环后保留其初始容量的89.8%)、高度可逆的晶体结构和高Li^(+)扩散系数。通过扫描电子显微镜(SEM)和X射线衍射(XRD)证实了回收工艺的有效性,通过循环伏安曲线、阻抗测试证实了HV-LCO的充放电特征。展开更多
文摘The complexes 1-4 of cyclobutanocucurbit[5]uril(CyB5Q[5])with Na^(+)/K^(+)have been synthesized and characterized by single-crystal X-ray diffraction.The results show that although the inorganic salts are used when the cations are the same and the anions are different,in complex 1,Na^(+)closes one port of CyB5Q[5]through Na—O seven coordination bonds to form a molecular bowl;in complex 3,Na^(+)completely closes the two ports of CyB5Q[5]to form a molecular capsule with six Na—O coordination bonds;in complexes 2 and 4,the two ports of CyB5Q[5]are completely closed to form K—O coordinated molecular capsules,but the K^(+)of complex 2 is six-coordinated and that of complex 4 is eight-/nine-coordinated.and complex 4 are connected by three oxygen bridges to form a 1D molecular chain.CCDC:2457122,1;2457121,2;2457400,3;2457120,4.
文摘Three copper(Ⅱ),nickel and cadmium(Ⅱ)complexes,namely[Cu_(2)(μ-H2dbda)2(phen)2]·2H_(2)O(1),[Ni(μ-H2dbda)(μ-bpb)(H_(2)O)2]n(2),and[Cd(μ-H2dbda)(μ-bpa)]n(3),have been constructed hydrothermally using H4dbda(4,4'-dihydroxy-[1,1'-biphenyl]-3,3'-dicarboxylic acid),phen(1,10-phenanthroline),bpb(1,4-bis(pyrid-4-yl)benzene),bpa(bis(4-pyridyl)amine),and copper,nickel and cadmium chlorides at 160℃.The products were isolated as stable crystalline solids and were characterized by IR spectra,elemental analyses,thermogravimetric analyses,and singlecrystal X-ray diffraction analyses.Single-crystal X-ray diffraction analyses revealed that three complexes crystallize in the monoclinic P21/n,tetragonal I42d,and orthorhombic P21212 space groups.The complexes exhibit molecular dimers(1)or 2D metal-organic networks(2 and 3).The catalytic performances in the Knoevenagel reaction of these complexes were investigated.Complex 1 exhibits an effective catalytic activity and excellent reusability as a heterogeneous catalyst in the Knoevenagel reaction at room temperature.CCDC:2463800,1;2463801,2;2463802,3.
文摘钴酸锂(LCO)电池凭借其高能量密度在锂离子电池市场占据中地位,然而废旧电池中大量存在的贵重金属元素对环境和经济都会造成巨大影响。因此,合理回收再利用对于资源可持续化有着重要意义。与现有的火法冶金和湿法冶金回收方法相比,直接再生法作为废旧钴酸锂最具潜力的回收策略。在这里,我们展示了一种直接再生工艺,不仅可以从废旧锂离子电池中回收LCO,还可以对其进行升级,强化结构稳定性,提升电化学性能。在回收过程中,基于废LCO与NiF_(2)和Li_(2)CO_(3)混合物之间的直接反应,在此过程中,F和Ni进入LCO体相内,形成双掺杂后的HV-LCO。升级后的HV-LCO在4.6 V高压下具有优异的倍率性能(1 C克容量为207.2 mA h·g^(-1),10C克容量为137.54 mA h·g^(-1))、良好的高倍率长循环性能(5C初始克容量为193.2mA h·g^(-1),200次循环后保留其初始容量的89.8%)、高度可逆的晶体结构和高Li^(+)扩散系数。通过扫描电子显微镜(SEM)和X射线衍射(XRD)证实了回收工艺的有效性,通过循环伏安曲线、阻抗测试证实了HV-LCO的充放电特征。
