用2,4,6-吡啶三甲酸和稀土钐、镝或钆的高氯酸盐溶液、碳酸锶、碳酸钾在180℃水热条件下进行反应,制备出3个含有3种金属离子的配位聚合物[Ln Sr K(ptc)2(H2O)]n(Ln=Sm(1)、Dy(2)、Gd(3),H3ptc=2,4,6-吡啶三甲酸)。X射线单晶衍射分析表...用2,4,6-吡啶三甲酸和稀土钐、镝或钆的高氯酸盐溶液、碳酸锶、碳酸钾在180℃水热条件下进行反应,制备出3个含有3种金属离子的配位聚合物[Ln Sr K(ptc)2(H2O)]n(Ln=Sm(1)、Dy(2)、Gd(3),H3ptc=2,4,6-吡啶三甲酸)。X射线单晶衍射分析表明三者具有相同的结构,属三斜晶系,P1空间群。配合物中配体2,4,6-吡啶三甲酸根以2种不同的配位方式与3种金属离子配位,一种方式中连接了7个金属离子,另一种方式中连接了8个金属离子。Ln(Ⅲ)为八配位,与羧基上的6个氧原子和2个吡啶环上的2个氮原子配位;Sr(Ⅱ)也是八配位,配位原子均为氧原子;K(Ⅰ)与5个氧原子配位。荧光发射光谱表明,钐和镝的配合物在紫外光激发下均发射Sm(Ⅲ)和Dy(Ⅲ)两种离子的特征荧光,钆的配合物在紫外光激发下由于发生荷移跃迁而发射绿色荧光。展开更多
The interaction between Sm(Ⅲ)(MTB)2 complex and Herring Sperm DNA has been studied by UV-Vis spectral, Fluorescence spectral in buffer solution of Tris-HCl (pH=7.25) using Neutral Red (NR) as a probe. The intercalati...The interaction between Sm(Ⅲ)(MTB)2 complex and Herring Sperm DNA has been studied by UV-Vis spectral, Fluorescence spectral in buffer solution of Tris-HCl (pH=7.25) using Neutral Red (NR) as a probe. The intercalation and electrostatic manner are confirmed to be the two major modes for interaction between Sm(Ⅲ)(MTB)2 complex and Herring Sperm DNA. The balance constant of Sm(Ⅲ)(MTB)2 rare earth metal complex and Herring Sperm DNA is K=4.10 × 104 L·mol-1. The results indicate that biological functions of Herring Sperm DNA are changed to a certain extend due to the interaction between Sm(Ⅲ)(MTB)2 rare earth metal complex and Herring Sperm DNA.展开更多
The molar dissolution enthalpy of the reactants and the products of the coordination reaction of Samarium Chloride with Glycine have been measured by isoperibol solution calorimetry, the calorimetric solvent is 2mol. ...The molar dissolution enthalpy of the reactants and the products of the coordination reaction of Samarium Chloride with Glycine have been measured by isoperibol solution calorimetry, the calorimetric solvent is 2mol. L-l HCI solution. The standard molar reaction enthalpy (298. 2K) is -7. 3381kJ· mol - 1. From the results and other auxiliary quantities, the standard molar enthalpy of formation of the new coordination compound has been calculated to be (Sm(Cly)3C13. 3H2O, s, 298. ZK) = - 3631. 74kJ · mol- 1.展开更多
Rare earth complex(C 5H 9C 9H 6) 3SmCl -Li +(THF) 4(Ⅰ) was synthesized by reacting anhydrous SmCl 3 with two equivalents of C 5H 9C 9H 6Li. From mix solvent of THF and hexane, red color single crystals were obtained....Rare earth complex(C 5H 9C 9H 6) 3SmCl -Li +(THF) 4(Ⅰ) was synthesized by reacting anhydrous SmCl 3 with two equivalents of C 5H 9C 9H 6Li. From mix solvent of THF and hexane, red color single crystals were obtained. The crystal belongs to a cubic system, space group P 2 13 with unit cell parameters a=b=c =1.754 0(2) nm, α=β=γ =90°, V =5.396 4(11) nm 3, Z =4. The ten coordinated samarium atom is bonded to three cyclopentylindenyl rings and a chlorine atom to form the anionic part of the title complex, ring centroids and the chlorine atom form a tortured tetrahedron around samarium. In the cationic part, lithium atom coordinates to four oxygen atoms of THF molecules to form a normal tetrahedron. The Sm-C(within the same ring) distance varies from 0 268 to 0 299 nm.展开更多
文摘用2,4,6-吡啶三甲酸和稀土钐、镝或钆的高氯酸盐溶液、碳酸锶、碳酸钾在180℃水热条件下进行反应,制备出3个含有3种金属离子的配位聚合物[Ln Sr K(ptc)2(H2O)]n(Ln=Sm(1)、Dy(2)、Gd(3),H3ptc=2,4,6-吡啶三甲酸)。X射线单晶衍射分析表明三者具有相同的结构,属三斜晶系,P1空间群。配合物中配体2,4,6-吡啶三甲酸根以2种不同的配位方式与3种金属离子配位,一种方式中连接了7个金属离子,另一种方式中连接了8个金属离子。Ln(Ⅲ)为八配位,与羧基上的6个氧原子和2个吡啶环上的2个氮原子配位;Sr(Ⅱ)也是八配位,配位原子均为氧原子;K(Ⅰ)与5个氧原子配位。荧光发射光谱表明,钐和镝的配合物在紫外光激发下均发射Sm(Ⅲ)和Dy(Ⅲ)两种离子的特征荧光,钆的配合物在紫外光激发下由于发生荷移跃迁而发射绿色荧光。
文摘The interaction between Sm(Ⅲ)(MTB)2 complex and Herring Sperm DNA has been studied by UV-Vis spectral, Fluorescence spectral in buffer solution of Tris-HCl (pH=7.25) using Neutral Red (NR) as a probe. The intercalation and electrostatic manner are confirmed to be the two major modes for interaction between Sm(Ⅲ)(MTB)2 complex and Herring Sperm DNA. The balance constant of Sm(Ⅲ)(MTB)2 rare earth metal complex and Herring Sperm DNA is K=4.10 × 104 L·mol-1. The results indicate that biological functions of Herring Sperm DNA are changed to a certain extend due to the interaction between Sm(Ⅲ)(MTB)2 rare earth metal complex and Herring Sperm DNA.
文摘The molar dissolution enthalpy of the reactants and the products of the coordination reaction of Samarium Chloride with Glycine have been measured by isoperibol solution calorimetry, the calorimetric solvent is 2mol. L-l HCI solution. The standard molar reaction enthalpy (298. 2K) is -7. 3381kJ· mol - 1. From the results and other auxiliary quantities, the standard molar enthalpy of formation of the new coordination compound has been calculated to be (Sm(Cly)3C13. 3H2O, s, 298. ZK) = - 3631. 74kJ · mol- 1.
文摘Rare earth complex(C 5H 9C 9H 6) 3SmCl -Li +(THF) 4(Ⅰ) was synthesized by reacting anhydrous SmCl 3 with two equivalents of C 5H 9C 9H 6Li. From mix solvent of THF and hexane, red color single crystals were obtained. The crystal belongs to a cubic system, space group P 2 13 with unit cell parameters a=b=c =1.754 0(2) nm, α=β=γ =90°, V =5.396 4(11) nm 3, Z =4. The ten coordinated samarium atom is bonded to three cyclopentylindenyl rings and a chlorine atom to form the anionic part of the title complex, ring centroids and the chlorine atom form a tortured tetrahedron around samarium. In the cationic part, lithium atom coordinates to four oxygen atoms of THF molecules to form a normal tetrahedron. The Sm-C(within the same ring) distance varies from 0 268 to 0 299 nm.
