[5-(芳氧乙酰氨基)-1,3,4-噻二唑-2-基]硫乙酸乙酯的合成及生物活性研究

以2-氨基-5-巯基-1,3,4-噻二唑和氯乙酸乙酯为原料,水相快速合成中间体(5-氨基-1,3,4-噻二唑-2-基)硫乙酸乙酯,该中间体再与芳氧乙酰氯反应,高产率得到6种目标化合物[5-(芳氧乙酰氨基)-1,3,4-噻二唑-2-基]硫乙酸乙酯(5a-5f)。所有这些化合物都经过了红外、元素分析以及核磁共振氢谱的表征。采用离体平皿法对目标化合物进行了除草活性试验,部分化合物显示出良好的除草活性,而小麦对其耐受。     

次声对人血压和脉搏的影响

用高于听阈２０ｄＢ的声级对４０名男人和２０名女人进行了次声暴露。试验对部分受试者的血压和脉博均有影响。特别在频率为４Ｈｚ时，血压的异常概率出现了最大值。再用１２５ｄＢ的固定声级对另外２０名男人进行的次声暴露也得到了同样的结果。这表明除听党外次声可影响一些非听觉系统，特别象心血管。     

Storage of Photoexcited Electron—Hole Pairs in an AlAs／GaAs Heterostructure Created by Electron Transfer in Real and κ Spaces

The storage of photoexcited electron-hole pairs is experimentally carried out and theoretically realized by transferring electrons in both real and κ spaces through resonant Γ-X in and AlAs/GaAs heterostructure,This is proven by the peculiar capacitance jump and hysteresis in the measured capacitance-voltage curves.Our structure may be used as a photonic memory cell with a long storage time and a fast retrieval of photons as well.     

Synthesis and Crystal Structure of a Magnesium Metal-organic Framework

A magnesium metal organic framework, [NH2(CH3)2][N(CH3)4][Mg5(bpdc)3(O2CH)6]· 3H2O (1, bpdcH2 = 4,4′-biphenyldicarboxylic acid), has been solvothermally synthesized and structurally characterized. 1 crystallizes in the trigonal system, space group R-3, with a = 11.3427(3), c = 41.5662(18) , V = 4631.3(3) 3, Z = 3 and the final R = 0.0457. Its structure features a pillared-layered three-dimensional network with 8.21  cavities, in which cationic [NH2(CH3)2]+ or [N(CH3)4]+ and lattice water molecules are located. Thermal stability of the title compound has also been investigated.     

An Interpenetrated Three-dimensional Framework Sodium Lanthanide Carboxylate Based on[Ho_4（μ_3-OH）_4]~（8＋） Cluster

A novel sodium holmium carboxylate compound,namely Na 4 Ho 4 (μ 3-OH) 4 (1,4BDC) 6 ·6.25H 2 O (1,1,4-BDC=1,4-benzenedicarboxylate),has been solvothermally synthesized and structurally characterized.The structure features a two-fold interpenetrated three-dimensional open-framework constructed by the [Ho 4 (μ 3-OH) 4 ] 8+ clusters bridged by 1,4-BDC ligands.The Na + ions and lattice water molecules are located in the channels.The structure is further stabilized by hydrogen-bonding and π-π stacking interactions.The thermal stability of the compound has been investigated via thermogravimetric analysis.     

2-氨基-5-巯基-1,3,4-噻二唑乙酸及其锌(Ⅱ)配位聚合物的合成、晶体结构及性质研究(英文)

用2-氨基-5-巯基-1,3,4-噻二唑乙酸(Hatma)为配体合成出一种金属锌配合物[Zn(atma)2]n,其结构通过IR、TGA、元素分析和X-射线单晶衍射法确定。从结构中看出,配合物通过π-π作用、分子间氢键作用和基团间的嵌合作用,由二维层状结构自组装形成一个三维的超分子骨架。电化学研究表明配合物中的Zn2+/Zn+对的氧化还原是一个不可逆过程。抗菌试验表明,该配合物比配体表现出更好的生物活性。     

Electro-oxidation of Formic Acid on Carbon Supported Edge-Truncated Cubic Platinum Nanoparticles Catalysts

The oxidation of formic acid on edge-truncated cubic platinum nanoparticles/C catalysts is investigated. X-ray photoelectron spectroscopy analysis indicates that the surface of edge-truncated cubic platinum nanoparticles is composed of two types of coordination sites. ＇/＇he oxidation behavior of formic acid on edge-truncated cubic platinum nanoparticles/C is investigated using cyclic voltammetry. The apparent activation energies are found to be 54.2, 55.0, 61.8, 69.5, 71.9, 69.26, 65.28k J/tool at 0.15, 0.3, 0.4, 0.5, 0.6, 0.65, 0.7V, respectively. A specific surface area activity of 1.76 mA·cm^-2 at 0.4 V indicates that the edge-truncated cubic Platinum nanoparticles are a promising anode catalyst for direct formic acid fuel cells.     

Eu(Ⅲ)功能化金属-有机框架的合成及其对1-萘酚的荧光传感

采用溶剂热合成方法，合成了一例金属-有机框架{[Zn₂(OH)(TZI)·2H₂O]·6DMF}_n(1)(TZI为5-四氮唑间苯二甲酸),并利用单晶X射线衍射、元素分析、红外光谱、热重分析、粉末X射线衍射等手段对化合物进行了结构表征。单晶X射线衍射结果显示配合物1呈现出三维孔道结构，并且孔道中存在未配位的羧基和配位的水分子。随后通过后合成法将Eu(Ⅲ)离子引入到框架中得到具有红光发射特征的Eu(Ⅲ)@1。在275 nm的激发光下，Eu(Ⅲ)@1存在两组荧光发射，第一组在418 nm处的宽峰为配合物1的荧光发射，荧光源于有机配体的吸收和发射；第二组五个发射峰为Eu(Ⅲ)离子的红色特征发射峰，其主峰为619 nm。尿液中其他成分抗干扰性实验结果表明，Eu(Ⅲ)@1荧光探针对于生物标记物1-萘酚非常敏感，能够导致红色荧光猝灭(619 nm),并伴有青色荧光增强(465 nm),对1-萘酚具有高选择性。荧光滴定实验结果显示Eu(Ⅲ)@1基于465和619 nm处荧光发射峰对1-萘酚的检测限分别为6.95μmol/L和1.75 m...     

两个基于2-氨基-5-巯基-1,3,4-噻二唑乙酸的稀土配合物的合成、晶体结构和性质研究

用2-氨基-5-巯基-1,3,4-噻二唑乙酸(Hatma)为配体合成出2种新型同构的稀土配合物[Ln(atma)₃(H₂O)₂]_n(Ln=La(1),Nd(2))。配体和2个配合物的结构均由X-射线单晶衍射法确定,同时对配合物进行了IR,TGA及元素分析。单晶结构表明,配体属单斜晶系,C2/c空间群,晶胞参数为a=2.1419(9)nm,b=0.40076(17)nm,c=1.7500(8)nm,V=1.4950(11)nm³,Z=4;配合物1和2的晶体都属于三斜晶系,空间群为P1,配合物1的晶胞参数为a=0.8820(3)nm,b=1.2306(4)nm,c=1.2586(4)nm,V=1.2913(7)nm³,Z=2;配合物2的晶胞参数为a=0.8834(4)nm,b=1.2283(5)nm,c=1.2510(5)nm,V=1.2821(9)nm³,Z=2。2个配合物均形成一维链状空间结构,通过丰富的氢键连接形成三维超分子结构。抗菌试验表明,配合物比配体表现出更好的生物活性。初步的植物生长实验表明,配合物对油菜和小麦的生长具有一定的促进作用。     

两个基于2-氨基-5-巯基-1, 3, 4-噻二唑乙酸的稀土配合物的合成、晶体结构和性质研究

用2-氨基-5-巯基-1,3,4-噻二唑乙酸(Hatma)为配体合成出2种新型同构的稀土配合物[Ln(atma)3(H2O)2]n(Ln=La(1),Nd(2))。配体和2个配合物的结构均由X-射线单晶衍射法确定,同时对配合物进行了IR,TGA及元素分析。单晶结构表明,配体属单斜晶系,C2/c空间群,晶胞参数为a=2.141 9(9)nm,b=0.400 76(17)nm,c=1.750 0(8)nm,V=1.495 0(11)nm3,Z=4;配合物1和2的晶体都属于三斜晶系,空间群为P1,配合物1的晶胞参数为a=0.882 0(3)nm,b=1.230 6(4)nm,c=1.258 6(4)nm,V=1.291 3(7)nm3,Z=2;配合物2的晶胞参数为a=0.883 4(4)nm,b=1.228 3(5)nm,c=1.251 0(5)nm,V=1.282 1(9)nm3,Z=2。2个配合物均形成一维链状空间结构,通过丰富的氢键连接形成三维超分子结构。抗菌试验表明,配合物比配体表现出更好的生物活性。初步的植物生长实验表明,配合物对油菜和小麦的生长具有一定的促进作用。