Synthesis,Crystal Structure,Theoretical Studies and Sensitive Response toward Fe~(3+) of a Novel Tripyrazole Derivative Ligand

A novel pyrazole derivative ligand, BTA(BTA = bis-(4-ethoxy-phenyl)-[4-(tripyrazol-1-yl-methyl)-phenyl]-amine), was synthesized and fully characterized by 1H-NMR, MALDI-TOF-MS spectra and single-crystal X-ray diffraction analysis. It crystallizes in triclinic, space group P1, with a = 11.827(1), b = 16.000(2), c = 16.527(2), α = 108.510(1), β = 91.116(5), γ = 101.734(1)°, V = 2894.5(6) 3, Z = 1, Dc = 1.262 g/m3, F(000) = 1162, Μr = 545.63, μ = 0.083 mm-1, the final R = 0.0728 and w R = 0.2213 for 7541 observed reflections with I 2(I). The structural analysis revealed that three pyrazole units are attached to the same carbon atom connected with bis-(4-ethoxy-phenyl)-phenyl-amine group. UV-vis spectral features of the ligand in various solutions were explained by time dependent density functional theory(TD-DFT). It was also found that the ligand(BTA) exhibits an exclusively selective and sensitive response toward Fe3+ using UV-vis spectroscopic method.     

A novel real-time cell electronic analysis technology for the authentication and quality control of natural medicines

The study was designed to explore the potential applications of the real-time cell electronic analysis technology in the quality evaluation of natural medicines. The natural medicinal Flos Carthami was discussed as a methodological example and the specific time/dose-dependent cell response profiles （TCRPs） were produced by the real-time cell electronic analysis technology. The similarity and bioactivity were obtained by analyzing all TCRPs. Meanwhile, an HPLC method according to the Chinese Pharmacopeia （edition 2010） was used to evaluate the quality of Flos Carthami. The correlation was obtained by comparing the results produced by the two different approaches. By analyzing the data, five different samples ofFlos Carthami can produce remarkably similar TCRPs. The quality ofFlos Carthami was evaluated by both the HPLC and the TCRPs analysis-based approaches and similar results were obtained. The results suggest that the same natural medicine from different locations could produce similar TCRPs. By analyzing the TCRPs, the bioactivity and quality evaluation of natural medicines can be obtained. This technology is a physiologically relevant approach for the quality evaluation of natural medicines. The ultimate aim of our study is to establish a new standard for quality evaluation.     

Synthesis and Structure of Bis(4-nitrobenzaldehyde thiosemicarbazone) Cadmium Iodide

1　INTRODUCTIONTransitionmetalcomplexesofthiosemicarbazoneshavebeenextensivelystud-ied〔1～3〕.Thiosemicarbazoneshavebeenshowntoexhibitvarioustypesofbiologicalactivitywhichinanumberofcasesarethoughttoberelatedtotheirabilitiestochelatemetals.Recently,therehasbeenconsiderableinterestinthechemistryofSchiffbasecompoundscontainingthiosemicarbazonesandtheirIIBgroupmetalcom-plexesduetotheirnonlinearopticalproperties〔4～6〕.Itcouldbeexpectedthatthede-signandsynthesisofIIBmetalcomplexesderived…     

配位聚合物{[Zn(TSC)(MAL)]·H2O}n的制备及结构表征

The novel Zn^Ⅱ complex, {[Zn(TSC)(MAL)]·H₂O}_n (1), where TSC is thiosemicarbazide and MAL is malonate radicle, was synthesized by self-assembling from the reaction of stoichiometric zinc chloride, thiosemicarbazide and malonic acid in solution at pH 4.5~5.0. The structural and physicochemical properties were characterized by X-ray diffraction, infrared spectroscopy, electronic spectra and thermal analysis. The crystal data for the title coordination polymer: Monoclinic, P2₁/c, β=107.808(1)°, a=0.937 59(1) nm, b=1.110 83(1) nm, c=0.921 00(2) nm, Z=2, μ=2.919 mm^-1, R₁=0.039 0, wR₂=0.099 4. The structure feature is that the bridging dicarboxylates effectively link the zinc centers to form polymeric chain in a zig-zag way, which is stabilized by N-H…O, N-H…S and O-H…O hydrogen bonds. CCDC: 231861.     

一种含二茂铁基的多枝状分子的合成、表征及其性质研究

采用新的方法合成了一种二茂铁衍生物——均三（二茂铁乙烯基）苯，通过元素分析、红外光谱、核磁共振氢谱、质谱、紫外可见光谱等对其进行了表征。用循环伏安法对其电化学性质进行了初步研究，用Z-扫描技术测试了它的非线性光学性能。结果表明，该化合物具有良好的电化学及非线性光学性质。     

Hydrothermal synthesis,structure and properties of a novel Zn(II) dicarboxylate containing nanometer channel by significant hydrogen bonds and π–π interactions

A two-dimensional supramolecular complex, [Zn(HA)₂(hmta)] · 2H₂O (1) (H₂A: 9-ethylcarbazole-3,6-dicarboxylic acid, hmta: 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane), has been prepared by hydrothermal synthesis and characterized by IR spectra, elemental analysis, TG analysis. The result of single crystal X-ray analysis revealed that the 2D supramolecular open framework contains 9.932 × 12.059 Å channels formed by significant hydrogen bonds and π–π interactions. Furthermore, the solid state fluorescent determinations show that the complex exhibits a strong emission band at 432 nm.     

Synthesis,luminescence, and cyclic voltammetric studies of novel binuclear ruthenium(II) complexes prepared from β-diketonate derivatives

Two bis-(β-diketonate) ligands [H₂L¹ = 3,6-bis-(4,4,4-trifluorobutane-1,3-dione)-9-butyl-carbazole and H₂L² = 3,6-bis-(4,4,4-trifluorobutane-1,3-dione)-9-hexyl-carbazole] were synthesized, and their corresponding dinuclear ruthenium(II) complexes [Ru₂(bpy)₄(L¹)](PF₆)₂ (1) and [Ru₂(bpy)₄(L²)](PF₆)₂ (2) (bpy = 2,2′-bipyridine)] were prepared by the reaction of Ru(bpy)₂Cl₂ · 2H₂O with H₂L¹ and H₂L² in ethanol, respectively. The structure of the ligand H₂L² was determined by single-crystal X-ray diffraction. The spectral properties of the ligands and their complexes have been studied. The absorption spectra of the complexes exhibit intense ligand-centered bands in the UV region and metal-to-ligand charge-transfer bands in the visible region. The two-photon absorption (TPA) coefficient β and TPA cross-section σ were determined by the Z-scan technique, which revealed that the two complexes exhibit strong TPA due to electronic extensive delocalization. The complexes undergo a reversible or quasi-reversible one-electron metal-centered redox process at E _1/2 = +0.93 V and E _1/2 = +0.92 V, respectively.     

Characterizing passive coherent population trapping resonance in a cesium vapor cell filled with neon buffer gas

We present a pair of phase-locked lasers with a 9.2-GHz frequency difference through the injection locking of a master laser to the RF-modulation sideband of a slave diode laser. Using this laser system, a coherent population trapping (CPT) signal with a typical linewidth of ～ 182 Hz is obtained in a cesium vapor cell filled with 30 Torr (4kPa) of neon as the buffer gas. We investigate the influence of the partial pressure of the neon buffer gas on the CPT linewidth, amplitude, and frequency shift. The results may offer some references for CPT atomic clocks and CPT atomic magnetometers.     

Synthesis and Structure of a Novel Macrocyclic Ligand( C_(22) H_(29) N_3 O_3 Br_2)

１　ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｍａｉｎｔａｒｇｅｔｉｎｍａｃｒｏｃｙｃｌｉｃｄｅｓｉｇｎｉｓｔｏｓｙｎｔｈｅｓｉｚｅｍａｃｒｏｃｙｃｌｅｓｗｈｉｃｈａｒｅａｂｌｅｔｏｄｉｓｃｒｉｍｉｎａｔｅａｍｏｎｇｔｈｅｄｉｆｆｅｒｅｎｔｍｅｔａｌｃａｔｉｏｎｓ．Ｍａｎｙｆａｃｔｏｒｓｉｎｆｌｕｅｎｃｉｎｇｔｈｅｓｅｌｅｃｔｉｖｉｔｉｅｓｏｆｍａｃｒｏｃｙｃｌｅｓｆｏｒｃａｔｉｏｎｓｈａｖｅｂｅｅｎｄｅｔｅｒｍｉｎｅｄｓｕｃｈａｓｓｕｂｓｔｉｔｕｅｎｔｅｆｆｅｃｔ，ｄｏｎｏｒａｔｏｍｉｃｔｙｐｅｓａｎｄ…     

新型咔唑羧酸类衍生物的合成、表征及光学性质研究

以咔唑为原料,合成了一种新型的咔唑类衍生物-9-异辛基-3, 6-咔唑二丙烯酸,其结构经1H NMR, IR和MS表征。运用UV、单光子液体荧光和固体荧光研究了中间体和目标产物的线性光学性质。结果表明：该化合物有望成为具有应用价值的发光材料。