Ion-Selective Electrodes for the Determination of Antimony and Thallium Based on Water-Insoluble Basic Dye Salts

Abstract

Hexachloroantimonate(V) and tetrachlorothallate(III) salts of Sevron Red L (C.I. Basic Red 17), Sevron Red GL (C.I. 11,085), Flavinduline O (C.I. 50,000) and Phenazinduline O have been applied in liquid-state ion-selective electrodes for the determination of antimony and thallium. The slope of potential versus pM graphs approach full Nernstian response in the range 10 M (Sb) and 10^?6 M (T1) to 10^?2 M. An unusual feature of the electrodes is their response to antimony(III) as well as to antimony(V).     

Catalytic oxidative cleavage of olefins by RuO4 organic solvent-free under ultrasonic irradiation

All the works reported about oxidative cleavage of olefins by the RuCl₃/NaIO₄ catalytic system have been performed in biphasic water/organic solvent(s). The first organic solvent-free oxidation of CC double bond by 2% RuCl₃/4.1 equiv NaIO₄/H₂O is described here using both the emulsifier Aliquat® 336 and 20 kHz ultrasonic irradiation.     

Template‐Free Galvanic Nanostructuring of Gold Electrodes for Sensitive Electrochemical Biosensors

Gold nanostructuring of smooth gold disk‐electrodes has been performed by electrodeposition. FE‐SEM images indicate a strongly enlarged electrochemically active surface of the modified electrodes. This could be approved by the gold oxide reduction peak in cyclic voltammetry. The electrodes were also applied for sequence‐specific DNA detection. For this, complementary single stranded capture probes were immobilized on the electrodes and consecutively hybridized with complementary and noncomplementary [OsO₄(bipy)]‐labeled DNA targets. We found that intermediate dehybridization steps did not decrease the sensitivity for the specific target. Moreover, the surface modification increased the voltammetric signal by an approx. factor of 9. Further, an enhanced linear calibration range was observed. The presented simple nanostructuring process holds great promise for many electrochemical sensor applications.     

Synthesis and characterization of antimony trichloride and bismuth trichloride complexes with valine

Two compounds of antimony trichloride and bismuth trichloride with valine are synthesized by solid phase synthesis at room temperature. Their compositions, determined by element analysis, are Sb(C₅H₁₀O₂N)₃·2H₂O and Bi(C₅H₁₀O₂N)₂Cl·0.5H₂O. The crystal structure of antimony complex with valine belongs to triclinic system and its lattice parameters are: a=0.9599 nm, b=1.5068 nm, c=1.9851 nm, α=92.270, β=95.050, γ=104.270. The crystal structure of bismuth complex with valine belongs to monoclinic system and its lattice parameters are: a=1.6012 nm, b=1.8941 nm, c=1.839 nm, β=99.73°. The far-infrared spectra and infrared spectra show that the amino group and carboxyl of valine may be coordinated to antimony and bismuth, respectively, in two compounds. The TG-DSC results also reveal that the complexes were formed.     

砷、锑、铋配合物的生物活性

合成新型砷、锑、铋的生物无机配合物并研究其构效关系与生物活性的作用机理,对于丰富生物无机化学内容、开发新的抗菌药和治疗肿瘤的化学药物都具有重要的意义和价值。本文简要综述了近年来砷、锑、铋的配合物在抗癌抗菌抗肿瘤等生物活性方面的应用,并展望了在该领域的应用前景。     

One-Dimensional Iodoantimonate(III) and Iodobismuthate(III) Supramolecular Hybrids with Diiodine: Structural Features,Stability and Optical Properties

Two isostructural pairs of supramolecular iodoantimonate(III) and iodobismuthate(III) complexes with I₂ units “trapped” in solid state via halogen bonding—Cat₃[[M₂I₉](I₂)} (Cat = tetramethylammonium and 1-methylpyridinium, M = Sb(III) and Bi(III)) were prepared. For all compounds, values of optical band gaps were determined, together with thermal stability; the complexes were additionally characterized by Raman spectroscopy.