Selectivity of a thiosemicarbazonatocopper(<scp>ii</scp>) complex towards duplex RNA. Relevant noncovalent interactions both in solid state and solution
作者:Rubén Gil-García、María Ugalde、Natalia Busto、Héctor J. Lozano、José M. Leal、Begoña Pérez、Gotzon Madariaga、Maite Insausti、Luis Lezama、Roberto Sanz、Lidia M. Gómez-Sainz、Begoña García、Javier García-Tojal
DOI:10.1039/c6dt02907h
日期:——
Thiosemicarbazones and their metal derivatives have long been screened as antitumor agents, and their interactions with DNA have been analysed. Herein, we describe the synthesis and characterization of compounds containing [CuL]+ entities (HL = pyridine-2-carbaldehyde thiosemicarbazone) and adenine, cytosine or 9-methylguanine, and some of their corresponding nucleotides. For the first time, crystal
Crystal chemistry of the divalent cation in alluaudite-type phosphates: A structural and infrared spectral study of the Na1.5()1.5Fe1.5(PO4)3 solid solutions (x=0 to 1, M2+=Cd2+, Zn2+)
作者:Frédéric Hatert
DOI:10.1016/j.jssc.2008.02.035
日期:2008.5
the M(1) site for x=0.25 and 0.50, and then on the M(1) and M(2) sites for x=0.75 and 1.00. Small amounts of Cd2+ were also detected on the A(1) site, compensated by small amounts of Na+ occurring on M(1). This partially disordered distribution is probably due to the similar effective ionic radii of Cd2+ and Na+. The cationic distributions in the Na1.5(Mn1−xZnx2+)1.5Fe1.5(PO4)3solidsolution indicate
通过在空气中进行固相反应合成Na 1.5(Mn 1- x M x 2+)1.5 Fe 1.5(PO 4)3(M 2+ = Cd 2 +,Zn 2+)钙铝石型固溶体的化合物,在800至900°C之间,并通过X射线粉末衍射和红外光谱进行了研究。Na 1.5(Mn 1- x Cd x 2+)1.5 Fe 1.5(PO 4)3的位点占用因子从X射线粉末图的Rietveld精炼获得的化合物表明,Cd 2+取代Mn 2+发生在x = 0.25和0.50的M(1)位置,然后在M(1 )和M(2)个网站,其中x = 0.75和1.00。在A(1)站点上还检测到少量的Cd 2+,由在M(1)上出现的少量Na +所补偿。这种部分无序的分布可能是由于Cd 2+和Na +具有相似的有效离子半径。Na 1.5中的阳离子分布(Mn 1- x Zn x 2+)1.5 Fe 1.5(PO 4)3固溶体表明,首先在M(2)位置引入Zn
Synthesis and X-ray Powder Diffraction Study of New Phosphates in the Cu3(PO4)2–Sr3(PO4)2 System: Sr1.9Cu4.1(PO4)4, Sr3Cu3(PO4)4, Sr2Cu(PO4)2, and Sr9.1Cu1.4(PO4)7
with Ca3Cu3(PO4)4. Copper cations in Sr3Cu3(PO4)4 have square planar and trigonal bipyramidal coordination and strontium cations have octahedral and ninefold coordination. Sr2Cu(PO4)2 is isotypic with Ba2Cu(PO4)2. Copper cations in Sr2Cu(PO4)2 have square planar coordination and strontium cations have ninefold coordination. Sr9.1Cu1.4(PO4)7 is structurally related to β-Ca3(PO4)2 and Sr3(PO4)2. A portion
A new s-Ca19Cu2(PO4)14 monophosphate with the whitlockite-like structure was synthesized and its structure was determined by the Rietveld analysis (Rwp = 6.15%, Rp = 4.66%, R1 = 3.44%, RF = 2.08% for 758 reflections). The crystal symmetry is trigonal (R3c space group, Z = 3) and the hexagonal unit cell parameters are a = 10.3638(1) A, c = 37.219(2) A, and V = 3462(2) A3 The copper atom is octahedrally
合成了一种新的s-Ca19Cu2(PO4)14单磷酸盐,具有类白云石结构,其结构由Rietveld分析确定(Rwp = 6.15%, Rp = 4.66%, R1 = 3.44%, RF = 2.08% for 758反射)。晶体对称性为三角形(R3c 空间群,Z = 3),六方晶胞参数为 a = 10.3638(1) A,c = 37.219(2) A,V = 3462(2) A3 铜原子为八面体协调。
Mechanochemical synthesis of cobalt/copper fluorophosphate generates a multifunctional electrocatalyst
A mechanochemical synthesis was developed to generate a highly active electrocatalyst featuring catalytic cobalt sites embedded within an electron-withdrawing fluorophosphate host.