A three-dimensional silver coordination polymer,[(Ag3（IN）2(CF3COO))]（IN=Isonicotinic acid）,was synthesized under mild hydrothermal conditions and characterized by single crystal X-ray diffraction.The compound crys...A three-dimensional silver coordination polymer,[(Ag3（IN）2(CF3COO))]（IN=Isonicotinic acid）,was synthesized under mild hydrothermal conditions and characterized by single crystal X-ray diffraction.The compound crystallizes in the triclinic space group P-1,with unit cell parameters a=0.918 48（5） nm,b=1.013 92（6） nm,c=1.067 05（6） nm,Z=2,R1=0.036 5,wR2=0.095 5.The Ag centers are bridged by the IN and CF3CO2 ligands to form three-dimensional structure.There are strong Ag-Ag bond interaction in the framework.展开更多
An acidic cerium sulfate hydrate,H3O[Ce(SO4)2(H2O)3] H2O,was hydrothermally synthesized and characterized by single crystal X-ray diffraction.The compound crystallizes in monoclinic system,space group P21/c with cell ...An acidic cerium sulfate hydrate,H3O[Ce(SO4)2(H2O)3] H2O,was hydrothermally synthesized and characterized by single crystal X-ray diffraction.The compound crystallizes in monoclinic system,space group P21/c with cell parameters: a=0.677 8（3） nm,b=1.908 2（7） nm,c=0.882 7（3） nm,β=97.332（7）°,V=1.115 5（7） nm3,Z=4,R1=0.029 5,wR2=0.065 0,GOF=0.974.It possesses a layered anion framework constructed of CeO9 tetradecahedra and SO4 tetrahedra with H3O+ ion and H2O molecules located in the aperture of the inorganic layers to balance the negative charge of the framework and stabilized the three-dimensional structure by hydrogen bonding within and between the neighboring layers.The thermal analysis of the compound was also carried out.展开更多
以三甲基环己基氢氧化铵和二甲基乙基环己基氢氧化铵为模板剂或结构导向剂(SDA),采用超浓水热方法合成了A形体富集的Beta沸石,用粉末X射线衍射(XRD)、扫描电子显微镜(SEM)、29Si固体魔角自旋核磁共振(29Si MAS NMR)以及氮气吸附等表征...以三甲基环己基氢氧化铵和二甲基乙基环己基氢氧化铵为模板剂或结构导向剂(SDA),采用超浓水热方法合成了A形体富集的Beta沸石,用粉末X射线衍射(XRD)、扫描电子显微镜(SEM)、29Si固体魔角自旋核磁共振(29Si MAS NMR)以及氮气吸附等表征手段对其进行了详细表征,探索了最优合成条件,研究了其晶化过程.结果表明,在晶化初期产物中己出现A形体过量特征,随着晶化的进行,A形体的过量程度无显著变化.展开更多
文摘A three-dimensional silver coordination polymer,[(Ag3（IN）2(CF3COO))]（IN=Isonicotinic acid）,was synthesized under mild hydrothermal conditions and characterized by single crystal X-ray diffraction.The compound crystallizes in the triclinic space group P-1,with unit cell parameters a=0.918 48（5） nm,b=1.013 92（6） nm,c=1.067 05（6） nm,Z=2,R1=0.036 5,wR2=0.095 5.The Ag centers are bridged by the IN and CF3CO2 ligands to form three-dimensional structure.There are strong Ag-Ag bond interaction in the framework.
文摘An acidic cerium sulfate hydrate,H3O[Ce(SO4)2(H2O)3] H2O,was hydrothermally synthesized and characterized by single crystal X-ray diffraction.The compound crystallizes in monoclinic system,space group P21/c with cell parameters: a=0.677 8（3） nm,b=1.908 2（7） nm,c=0.882 7（3） nm,β=97.332（7）°,V=1.115 5（7） nm3,Z=4,R1=0.029 5,wR2=0.065 0,GOF=0.974.It possesses a layered anion framework constructed of CeO9 tetradecahedra and SO4 tetrahedra with H3O+ ion and H2O molecules located in the aperture of the inorganic layers to balance the negative charge of the framework and stabilized the three-dimensional structure by hydrogen bonding within and between the neighboring layers.The thermal analysis of the compound was also carried out.
文摘采用脉冲激光沉积法在单晶SrTiO3(STO)基底上制备了La0.62Ca0.29K0.09MnO3(LCKMO)薄膜,通过调控基底温度获得了平整致密的膜层.利用二维面探X射线衍射仪和高分辨透射电子显微镜对薄膜结构进行了表征.结果表明,薄膜呈高质量取向外延生长,对应关系为{001}LCKMO||{001}STO.对薄膜的磁热性能研究表明,5 T下最大磁熵变为3.45 J/(kg·K),相对制冷效率为379.5 J/kg,磁熵半峰宽为110 K.
文摘以三甲基环己基氢氧化铵和二甲基乙基环己基氢氧化铵为模板剂或结构导向剂(SDA),采用超浓水热方法合成了A形体富集的Beta沸石,用粉末X射线衍射(XRD)、扫描电子显微镜(SEM)、29Si固体魔角自旋核磁共振(29Si MAS NMR)以及氮气吸附等表征手段对其进行了详细表征,探索了最优合成条件,研究了其晶化过程.结果表明,在晶化初期产物中己出现A形体过量特征,随着晶化的进行,A形体的过量程度无显著变化.
