bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mono‐ and Dinuclear CuII and ZnII Complexes of Cyclen‐Based Bis(macrocycles) Containing Two Aminoalkyl Pendant Arms of Different Lengths
Authors: Anda Carmen , Bencini Andrea , Berni Emanuela , Ciattini Samuele , Chuburu Françoise , Danesi Andrea , Giorgi Claudia , Handel Henri , Le Baccon Michel , Paoletti Piero , Tripier Raphaël , Turcry Véronique , Valtancoli Barbara 
Published: June 2005

AbstractThe basicity and coordination properties towards CuII and ZnII of the bis(macrocycles) L1, L2 and L3 have been investigated by means of potentiometric, 1H NMR and UV/Vis spectroscopic titrations in aqueous solutions. The synthesis of L1 and L3 is also described. The three ligands are composed of two [12]aneN4 units separated by a p‐phenylene spacer and differ in the length of the aminoalkyl pendant arms linked to each macrocyclic unit. L1–L3 form mono‐ and dinuclear complexes in aqueous solutions; in the dinuclear species each metal ion is coordinated by one of the two identical [12]aneN4 ligand moieties, as shown by the crystal structures of the complexes [Cu2L1]Cl4·8H2O, [Zn2L2](ClO4)4 and [Zn2L3](ClO4)4·H2O. In all structures the metal ion is pentacoordinate, and is bound to the four nitrogen donors of the cyclic unit and to the amine group of the side arm. The stability of both the [ML]2+ and [M2L]4+ complexes in aqueous solution decreases in the order L1 > L2 > L3. At the same time, both the [Cu2L]4+ and [Zn2L]4+ complexes show a different ability in proton binding among the three ligands, with the [M2L1]4+ complexes displaying the highest basicity. These results are explained in terms of the decreasing number of nitrogen donors involved in CuII or ZnII binding on passing from L1 to L3; in other words, while in the L1 dinuclear complexes each metal ion is coordinated to the four amine groups of a [12]aneN4 moiety and to the amine group of the side arm, in the L3 ones the metal cations are bound only to the four donor atoms of a cyclic moiety, the aminobutyl group not being coordinated. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
A Rearrangement of Azobenzene upon Interaction with an Aluminum(I) Monomer LAl {L = HC[(CMe)(NAr)]2, Ar = 2,6‐iPr2C6H3}
Authors: Zhu Hongping , Chai Jianfang , Fan Hongjun , Roesky Herbert W. , Nehete Umesh N. , Schmidt Hans‐Georg , Noltemeyer Mathias 
Published: June 2005

AbstractReaction of LAl (1) or [LAl{η2‐C2(SiMe3)2}] (2) {L = HC[(CMe)(NAr)]2, Ar = 2,6‐iPr2C6H3} with azobenzene affords a five‐membered ring compound [LAl{N(H)‐o‐C6H4N(Ph)}] (3). In the formation of 3 a three‐membered intermediate [LAl(η2‐N2Ph2)] (A) is suggested by a [1 + 2] cycloaddition reaction; A is not stable and further rearranges to 3. DFT calculations on similar compounds with modified L' {L' = HC[(CMe)(NPh)]2} show that the complexation energy of the reaction of L'Al with azobenzene to form [L'Al(η2‐N2Ph2)] is about–39 kcal mol–1, and the best estimate of the energy difference between [L'Al(η2‐N2Ph2)] and [L'Al{N(H)‐o‐C6H4N(Ph)}] is–76 kcal mol–1. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Pyridine‐ and Imidazoledicarboxylates of Zinc: Hydrothermal Synthesis, Structure, and Properties
Authors: Mahata Partha , Natarajan Srinivasan 
Published: June 2005

AbstractThe reaction of hetrocyclic dicarboxylic acids, such as pyridine‐2,5‐dicarboxylic acid and imidazole‐4,5‐dicarboxylic acid, under hydrothermal conditions in the presence of an appropriate zinc salt yields three new zinc coordination polymers 0∞[{Zn2(H2O)4}{C5H3N(COO)2}2] (1), 1∞[{Zn(C12H8N2)}{C5H3N(COO)2}·0.5H2O] (2), and 1∞[{Zn(C12H8N2)}{C3HN2(COO)2}] (3). While 1 forms with a zero‐dimensional molecular rectangular box structure, 2 and 3 have zig‐zag one‐dimensional chain structures. The Zn2+ ions are coordinated by both the carboxylate oxygen atoms and also by the nitrogen atoms of the heterocycles. The 1,10‐phenanthroline molecules in 2 and 3 act as a secondary ligands and occupy the inter‐chain spaces. The moderate hydrogen‐bond interaction energy in 1 and the π···π interactions in 2 and 3 appear to play an important role for the structural stability. The structures of 2 and 3 appear to be related, even though they are formed with different carboxylic acids. All three compounds exhibit photoluminescence at room temperature. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Effects of Anthracene and Pyrene Units on the Interactions of Novel Polypyridylruthenium(II) Mixed‐Ligand Complexes with DNA
Authors: Mariappan Mariappan , Maiya Bhaskar G. 
Published: June 2005

Abstract2‐(9‐Anthryl)‐1H‐imidazo[4,5‐f][1,10]phenanthroline (aip) and [2‐(1‐pyrenyl)‐1H‐imidazo[4,5‐f][1,10]phenanthroline (pyip) and their complexes [Ru(phen)2(aip)]2+ (1) and [Ru(phen)2(pyip)]2+ (2) (phen = 1,10‐phenanthroline) have been synthesized and characterized by elemental analysis, UV/Vis, IR and 1H NMR spectroscopy, FAB‐MS and cyclic voltammetry methods. Both 1 and 2 are redox‐active and undergo oxidation at 1.43 and 1.47 V (vs. SCE), respectively. Both 1 and 2 show only the 3MLCT emission typical of any polypyridylruthenium(II) complex. These new complexes are seen to be excellent binders of calf‐thymus (CT) DNA, as revealed by the results of absorption, luminescence, viscometric titrations, and thermal denaturation studies. These results also indicate that while ruthenium‐bound aip and pyip intercalate within the base pairs of the duplex, the phen moieties act only as spectator ligands in each case. Steady‐state emission studies carried out in aqueous media with and without DNA reveal that [Ru(phen)2(pyip)]2+ is a better “molecular light switch” for DNA than [Ru(phen)2(aip)]2+. Under an identical set of experimental conditions of light and drug dose, the DNA photocleavage ability of [Ru(phen)2(pyip)]2+ is also higher than that of [Ru(phen)2(aip)]2+. “Inhibitor studies” suggest that the oxygen species are mainly responsible for the DNA photocleavage by these complexes. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Synthesis of H2V3O8 Single‐Crystal Nanobelts
Authors: Li Gui‐cun , Pang Shu‐ping , Wang Zhao‐bo , Peng Hong‐rui , Zhang Zhi‐kun 
Published: June 2005

AbstractOrthorhombic H2V3O8 single‐crystal nanobelts with a thickness of less than 30 nm and a length up to several hundreds of micrometers have been synthesized using bulky divanadium pentoxide powders as a precursor. The synthetic process is free of any templates and reducing agents. Divanadium pentoxide undergoes a redox reaction under hydrothermal conditions. The influences of pH, reaction time, and temperature on the morphologies of the resulting products have been investigated. The belt‐like H2V3O8 with a high surface area may be beneficial to lithium insertion between the V3O8 layers for application in batteries. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Oxalate‐Based 3D Chiral Magnets: The Series [ZII(bpy)3][ClO4][MIIFeIII(ox)3] (ZII = Fe, Ru; MII = Mn, Fe; bpy = 2,2'‐Bipyridine; ox = Oxalate Dianion)
Authors: Coronado Eugenio , Galán‐Mascarós José R. , Gómez‐García Carlos J. , Martínez‐Ferrero Eugenia , Almeida Manuel , Waerenborgh João C. 
Published: June 2005

AbstractThe synthesis, structure, and physical properties of the oxalate‐based molecular magnets with the formula [ZII(bpy)3][ClO4][MIIFeIII(ox)3] (ZII = Fe, Ru; MII = Mn, Fe; bpy = 2,2'‐bipyridine; ox = oxalate dianion) are presented here. All compounds are isostructural and crystallize in the chiral cubic space group P4132, and contain three‐dimensional dimetallic networks formed by alternating MII and MIII ions that are connected by oxalate anions. These compounds exhibit strong antiferromagnetic interactions that give rise to magnetic ordering as ferrimagnets or weak ferromagnets, with critical temperatures of up to 20 K, which is twice as high as those found for the isostructural magnets based on CrIII, as determined by magnetic measurements and Mössbauer spectroscopy. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Synthesis and Crystal Structures of Four Cyanide‐Bridged Coordination Polymers
Authors: He Xiang , Lu Can‐Zhong , Yuan Da‐Qiang , Chen Shu‐Mei , Chen Jiu‐Tong 
Published: June 2005

AbstractThe hydrothermal reaction of Cu(NO3)2·3 H2O, K3Fe(CN)6, and 1,10‐phenanthroline (1,10‐phen) or 2,2'‐bipyridine (2,2'‐bpy) gives rise to the three one‐dimensional helical‐chain complexes [Cu2Fe(CN)4(1,10‐phen)3]n·0.5n H2O (1), [Cu3(CN)3(1,10‐phen)3]n (2), and [Cu3(CN)3(2,2'‐bpy)3]n (3), and the two‐dimensional layer complex [Cu3Fe(CN)5(2,2'‐bpy)2]n (4). The structure of 1 contains a cyanide‐bridged CuI···FeII···CuI chain in which the two copper and one iron centers exhibit different coordination environments. The structures of 2 and 3 are both monometallic. Complex 4 is constructed alternately from fused 6‐ and 14‐metal‐membered nonplanar centrosymmetric rings that form a 2D layer architecture. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
1,3,5‐Triazapentadienes as Chelating Ligands: 1,2,4‐Triphenyl‐1,3,5‐triaza‐pentadiene Complexes of Cobalt(II), Nickel(II), Palladium(II), Copper(II) and Zinc(II)
Authors: Heße Nadine , Fröhlich Roland , Humelnicu Ionel , Würthwein Ernst‐Ulrich 
Published: June 2005

Abstract1,2,4‐Triphenyl‐1,3,5‐triazapentadiene (1a), prepared from benzamidine and N‐phenylbenzimidoyl chloride, was treated at room temperature with CoCl2, Ni(NO3)2, Na2PdCl4, CuCl2 and ZnCl2 to form the corresponding six‐membered 1:1 chelate complexes 1a·CoCl2, 1a·Ni(NO3)2, 1a·PdCl2, 1a·CuCl2, and 1a·ZnCl2. In the solid state 1a·Ni(NO3)2 forms infinite linear chains, bridged by nitrate ions. From 1a and Cu(OTf)2 a 2:1 copper complex was obtained [(1a)2·Cu(OTf)2]. In all cases a proton shift from nitrogen atom N1 in the free ligand to N3 in the complex was observed. All complexes were completely characterized including X‐ray crystallography. Quantum chemical DFT calculations indicate that triazapentadiene is a better ligand for ZnCl2, PdCl2 and CuCl2 compared to ‐diimines and N‐acylamidines. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Towards Understanding of the Selective Precipitation of Alkali Metal Cations in Presence of Dipicrylamine Anion
Authors: Eringathodi Suresh , Agnihotri Pragati , Ganguly Bishwajit , Bhatt Pragnya , Sivagnana Subramanian Palani , Paul Parimal , Ghosh Pushpito K. 
Published: June 2005

AbstractDipicrylamine anion (DPA–) precipitates out [K(DPA)] with high selectivity from salt bitterns containing Na+, K+, and Mg2+, whereas the same ligand shows poor selectivity towards K+ – and much higher selectivity towards Cs+ – in studies conducted with a mixture of K+, Rb+, and Cs+. Their single‐crystal structures reveal that the K+ and Rb+ salts have similar layered structures, with 8 oxygen atoms from seven DPA– anions encapsulating the metal cation, whereas the Cs+ salt possesses a channel‐like structure with the metal ion encapsulated by ten oxygen atoms from six DPA–. The conformation of DPA– in the [Cs(DPA)] single crystal matches closely that of DPA in crystalline state. M···O and intermolecular C–H···O interactions together stabilize the structures. The 133Cs NMR spectrum of the poorly soluble [Cs(DPA)] shows an upfield shift of the peak with respect to CsCl as a result of the interaction with the oxygen atoms of DPA–, whereas 23Na NMR spectrum of the highly soluble [Na(DPA)] shows no such upfield shift compared to NaCl. Powder XRD patterns of bulk [M(DPA)] (M = K+, Rb+, and Cs+) precipitates show that these are similar to the patterns obtained by simulation of the single‐crystal X‐ray data. The selectivity of precipitation correlates qualitatively with the size and hydration enthalpies of the ions. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Heterosite Effects in Novel Heteronuclear Clusters [Os2Ru(CO)11(PPh3)] and [Os2Ru(CO)10(2‐acetylpyridine‐N‐isopropylimine)]
Authors: Vergeer Frank W. , Lutz Martin , Spek Anthony L. , Calhorda Maria J. , Stufkens Derk J. , Hartl František 
Published: June 2005

AbstractA new synthetic route towards the mixed‐metal cluster [Os2Ru(CO)12] is described together with the syntheses of its PPh3 and iPr‐AcPy (iPr‐AcPy = 2‐acetylpyridine‐N‐isopropylimine) derivatives. The molecular structures of the novel clusters [Os2Ru(CO)11(PPh3)] and [Os2Ru(CO)10(iPr‐AcPy)] were determined on the basis of crystalline solid solutions of the Os2Ru and corresponding Os3 species. The structures reveal that coordination of the Lewis bases occurs exclusively at the ruthenium site of [Os2Ru(CO)12], which is in agreement with density functional theory (DFT) calculations on several structural isomers of these compounds. According to the time‐dependent DFT results, the lowest optically accessible excited state of [Os2Ru(CO)10(iPr‐AcPy)] has a prevailing σ(Ru–Os2)π*(iPr‐AcPy) character, with a partial σσ*(Ru–Os2) contribution. In weakly coordinating 2‐chlorobutane, the excited state has a lifetime τ = 10.4 ± 1.2 ps and produces biradicals considerably faster than observed for [Os3(CO)10(iPr‐AcPy) (τ = 25.3 ± 0.7 ps). In coordinating acetonitrile, the excited state of [Os2Ru(CO)10(iPr‐AcPy)] decays mono‐exponentially with a lifetime τ = 2.1 ± 0.2 ps. In contrast to [Os3(CO)10(iPr‐AcPy)] that forms biradicals as the main primary photoproduct even in strongly coordinating solvents, zwitterion formation from the solvated lowest excited state is observed for the heterometallic cluster. This is concluded from time‐resolved absorption studies in the microsecond time domain. Due to the lower tendency of the coordinatively unsaturated +Ru(CO)2(iPr‐AcPy·–/0) moiety to bind a Lewis base, the heteronuclear biradical and zwitterionic photoproducts live significantly shorter than their triosmium counterparts. The influence of the weaker Os2–Ru(iPr‐AcPy) bond on the redox reactivity is clearly reflected in very reactive radical anions formed upon electrochemical reduction of [Os2Ru(CO)10(iPr‐AcPy)]. The dimer [–Os(CO)4‐Os(CO)4‐Ru(CO)2(iPr‐AcPy)]22– is the only IR‐detectable intermediate reduction product. The dinuclear complex [Os2(CO)8]2– and insoluble [Ru(CO)2(iPr‐AcPy)]n are the ultimate reduction products, proving fragmentation of the Os2Ru core. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Synthesis, Structure, and Ligand Redistribution Equilibria of Mixed Ligand Complexes of the Heavier Group 2 Elements Containing Pyrazolato andβ‐Diketiminato Ligands
Authors: El‐Kaderi Hani M. , Heeg Mary Jane , Winter Charles H. 
Published: June 2005

AbstractTreatment of M[N(SiMe3)2]2(THF)2 (M = Ca, Sr, Ba) with various stoichiometries of N‐tert‐butyl‐4‐(tert‐butylimino)‐2‐penten‐2‐amine (LtBuH) and 3,5‐di‐tert‐butylpyrazole (tBu2pzH) afforded [(η2‐tBu2pz)Ca(μ‐η5:η2‐tBu2pz)(μ‐η2:η2‐tBu2pz)Ca(η5‐LtBu)] (17 %), [Sr(μ‐η5:η2‐tBu2pz)(η5‐LtBu)]2 (50 %), and [Ba(μ‐η5:η2‐tBu2pz)(η5‐LtBu)]2 (66 %) as colorless crystalline solids. The formulations of the new complexes were assigned from spectral and analytical data and by X‐ray crystal structure determinations. In the solid state, [(η2‐tBu2pz)Ca(μ‐η5:η2‐tBu2pz)(μ‐η2:η2‐tBu2pz)Ca(η5‐LtBu)] exists as a dimer that is held together by μ‐η5:η2‐ and μ‐η2:η2‐pyrazolato ligands, with a terminal η2‐tBu2pz ligand on one calcium ion and an η5‐LtBu ligand on the other. The dimeric structures of [Sr(μ‐η5:η2‐tBu2pz)(η5‐LtBu)]2 and [Ba(μ‐η5:η2‐tBu2pz)(η5‐LtBu)]2 are connected by two μ‐η5:η2‐pyrazolato ligands, and the coordination sphere of each metal ion is capped with an η5‐LtBu ligand. In toluene solution, [(η2‐tBu2pz)Ca(μ‐η5:η2‐tBu2pz)(μ‐η2:η2‐tBu2pz)Ca(η5‐LtBu)] exists as an equilibrium mixture of at least four compounds. In toluene solution, [Sr(μ‐η5:η2‐tBu2pz)(η5‐LtBu)]2 exists in equilibrium with Sr(η5‐LtBu)2 and Sr4(tBu2pz)8. A van’t Hoff analysis of this equilibrium between 46 and 104 °C afforded ΔH° = 22.2 ± 0.7 kcal/mol, ΔS° = 43.7 ± 1.9 cal/mol·K, and ΔG°(298 K) = 9.2 ± 0.9 kcal/mol. [Ba(μ‐η5:η2‐tBu2pz)(η5‐LtBu)]2 exists in toluene solution as a single, pure species between –60 and +80 °C. The overall results suggest that the η5‐LtBu ligand is better at saturating the coordination sphere of the metal ion to which it coordinates than is the tBu2pz ligand, and is suggested as a more promising ligand for the construction of practical, volatile chemical vapor deposition film growth precursors. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
First‐Row Transition Metal Bis(amidinate) Complexes; Planar Four‐Coordination of FeII Enforced by Sterically Demanding Aryl Substituents
Authors: Nijhuis Christian A. , Jellema Erica , Sciarone Timo J. J. , Meetsma Auke , Budzelaar Peter H. M. , Hessen Bart 
Published: June 2005

AbstractThe sterically hindered benzamidinate ligand [PhC(NAr)2]– (Ar = 2,6‐iPr2C6H3) has been employed to prepare bis(amidinate) complexes [{PhC(NAr)2}2M] of the divalent first‐row transition metals Cr–Ni (1–5). For Cr (planar), Mn and Co (tetrahedral) the observed structures follow the electronic preference for the metal ion in its highest spin multiplicity, as determined by DFT calculations. Remarkably, the Fe derivative adopts a distorted planar structure while retaining the high‐spin (S = 2) configuration. This rare combination is due to reduced interligand steric interactions in the planar vs. the tetrahedral structure, combined with a relatively small electronic preference of FeII for the tetrahedral environment. Thus, the simple bidentate ligand N,N'‐diarylbenzamidinate provides a convenient means to make this unusual species accessible for further study. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Synthesis and Characterisation of a Novel Copper(II) Azamacrocycle‐Phosphonate 3D Polymeric Network
Authors: Giambastiani Giuliano , Oberhauser Werner , Bianchini Claudio , Laschi Franco , Sorace Lorenzo , Brueggeller Peter , Gutmann Rene , Orlandini Annabella , Vizza Francesco 
Published: June 2005

AbstractA new azamacrocycle phosphonate in its hydrocloride form (1) has been synthesized and characterised by multinuclear NMR spectroscopy and by a single X‐ray analysis. The reaction of 1 with CuII ions gives a polymeric compound (2), which exhibits an unprecedented three‐dimensional network containing two‐dimensional channels filled with guest molecules. The solid‐state structure of 2 and its properties have been characterised by means of various analytical methods which include single‐crystal X‐ray structure analysis, X‐ray powder diffraction, thermogravimetric studies as well as magnetic susceptibility and EPR measurements. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Synthesis, Molecular Structure and Reactivity of a Calix[4]arene Monomethyl Ether Supported Nitridomolybdenum Complex (Eur. J. Inorg. Chem. 11/2005)
Authors: Deplano Paola , Zeller Jürgen , Büschel Susanne , Reiser Benjamin K. H. , Begum Farida , Radius Udo 
Published: June 2005

AbstractThe cover picture shows the reaction of a calix[4]arene methyl ether stabilized nitridomolybdenum complex [MoN(MeCalix)] with GaCl3 to yield the compound [Mo(NGa‐Cl3)(MeCalix)]. This complex represents the first structurally characterized example of a nitrido‐bridged dinuclear compound of a group 6 metal and a group 13 halide [EX3]. Both metal atoms are unsymmetrically bridged with a short [Mo≡N] and a long [Ga−N] contact. Details on synthesis and structural characterization are discussed in the article by U. Radius et al. on p. 2037 ff. In the background there is a view from the University of Karlsruhe (TH) to the adjacent “Hardtwald” on a stormy day photographed by Bernhard Mühr (www.wolkenatlas.de).
Electrocatalytic Oxidation and Determination of Norepinephrine at Poly(Cresol Red) Modified Glassy Carbon Electrode
Authors: Chen Wei , Lin Xinhua , Luo Hongbin , Huang Liying 
Published: June 2005

AbstractA glassy carbon electrode (GCE) was modified with electropolymerized films of cresol red in pH 5.6 phosphate buffer solution (PBS) by cyclic voltammetry (CV). The modified electrode shows an excellent electrocatalytic effect on the oxidation of norepinephrine (NE). The peak current increases linearly with the concentration of NE in the range of 3×10−6–3×10−5 M by the differential pulse voltammetry. The detection limit was 2×10−7 M. The modified electrode can also separate the electrochemical responses of norepinephrine and ascorbic acid (AA). The separation between the anodic peak potentials of NE and AA was 190 mV by the cyclic voltammetry. And the responses to NE and AA at the modified electrode were relatively independent.
The Influence of Rhodium(+3) onVoltammetry of Selenium(+4) in Perchloric Acid
Authors: Zelić Marina 
Published: June 2005

AbstractIn comparison with previously described voltammetric behavior of selenium(+4)–rhodium(+3) system in sulfuric or hydrochloric acid, results obtained in 0.1 mol/L perchloric acid differ significantly. The difference includes: a) number of signals and conditions under which they appear b) current‐concentration plots with nonzero intercepts c) unusual dependence of the peak characteristics on the speed of the applied technique and d) much more pronounced peak height enhancement. In square wave voltammetry the signal at −0.75 V can be even 230 times higher with rhodium(+3) than without it. Most probably the peak at −1.15 V corresponds to the catalytic reduction of hydrogen ions whereas the signal at −0.75 V is additionally influenced by some other processes. Results are highly dependent on the form of rhodium(+3) in the initial solution and qualitatively similar to those previously obtained with sulfur compounds and dissolved metal catalysts.
Gold Nanoparticle Modified Electrodes Show a Reduced Interference by Cu(II) in the Detection of As(III) Using Anodic Stripping Voltammetry
Authors: Dai Xuan , Compton Richard G. 
Published: June 2005

AbstractInterference by Cu(II) causes serious problems in the detection of As(III) using anodic stripping voltammetry at gold electrodes. The behavior of Cu(II) and As(III) were examined at both a gold macro electrode and two kinds of gold nanoparticle modified electrodes, one where gold particles are deposited on glassy carbon (GC) and the other where basal plane pyrolytic graphite (BPPG) is the substrate. The sensitivity of As(III) detection was higher on gold nanoparticle modified electrodes than those on a macro gold electrode by up to an order of magnitude. In addition, the stripping peak of As(III) was narrower and more symmetric on a gold nanoparticle‐modified GC electrode, leading to analytical data with a lower limit of detection. At a macro gold electrode, the peak currents of Cu(II) were higher than those on gold nanoparticle modified electrodes. Accordingly, through the use of gold nanoparticle modified electrodes, the effect of copper interference to the arsenic detection can be reduced.