1
|
Mohmad M, Agnihotri N, Kumar V, Sharma U, Kumar R, Kaviani S, Kumar A, Kamal R. A Novel Analytical, Bioanalytical and Theoretical Approach to the Platinum(II)-3-hydroxy-2-(4-methoxyphenyl)-4H-chromen-4-one Complex. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
|
2
|
Bai YY, Feng ZT, Yang YJ, Yang XY, Zhang ZL. Current Lifetime of Single-Nanoparticle Collision for Sizing Nanoparticles. Anal Chem 2021; 94:1302-1307. [PMID: 34957818 DOI: 10.1021/acs.analchem.1c04502] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Accurate size analysis of nanoparticles (NPs) is vital for nanotechnology. However, this cannot be realized based on conventional single-nanoparticle collision (SNC) because the current intensity, a thermodynamic parameter of SNC for sizing NPs, is always smaller than the theoretical value due to the effect of NP movements on the electrode surface. Herein, a size-dependent dynamic parameter of SNC, current lifetime, which refers to the time that the current intensity decays to 1/e of the original value, was originally utilized to distinguish differently sized NPs. Results showed that the current lifetime increased with NP size. After taking the current lifetime into account rather than the current intensity, the overlap rates for the peak-type current transients of differently sized Pt NPs (10 and 15 nm) and Au NPs (18 and 35 nm) reduced from 73 and 7% to 45 and 0%, respectively, which were closer to the theoretical values (29 and 0%). Hence, the proposed SNC dynamics-based method holds great potential for developing reliable electrochemical approaches to evaluate NP sizes accurately.
Collapse
Affiliation(s)
- Yi-Yan Bai
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Zhi-Tao Feng
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Yan-Ju Yang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Xiao-Yan Yang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Zhi-Ling Zhang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| |
Collapse
|
3
|
Racles C, Zaltariov M, Coroaba A, Silion M, Diac C, Dascalu A, Iacob M, Cazacu M. New heterogeneous catalysts containing platinum group metals recovered from a spent catalytic converter. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Carmen Racles
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| | | | - Adina Coroaba
- Centre of Advanced Research in Bionanoconjugates and Biopolymers “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| | - Mihaela Silion
- Physics of Polymers and Polymeric Materials “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| | - Cornelia Diac
- 3NanoSAE Research Center Faculty of Physics – University of Bucharest Magurele Romania
| | - Andrei Dascalu
- Centre of Advanced Research in Bionanoconjugates and Biopolymers “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| | - Mihail Iacob
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| | - Maria Cazacu
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| |
Collapse
|
4
|
Bai YY, Yang YJ, Wu Z, Yang XY, Lin M, Pang DW, Zhang ZL. Size-Resolved Single Entity Collision Biosensing for Dual Quantification of MicroRNAs in a Single Run. ACS APPLIED MATERIALS & INTERFACES 2021; 13:22254-22261. [PMID: 33966389 DOI: 10.1021/acsami.1c04747] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Limited to the accuracy of size resolution, single entity collision biosensing (SECBS) for multiplex immunoassays remains challenging, because it is difficult to get the true value of nanoparticle (NP) sizes based on the current intensity due to the complex movement of NPs on the electrode surface. Considering that the size-dependent movement of NPs meanwhile will generate a characteristic current shape, in this work, the huge difference in the current rise time of 5 and 15 nm Pt NPs colliding on an Au ultramicroelectrode (d = 30 μm) was originally used to develop a size-resolved SECBS for multiplex immunoassays of miRNAs. The limit concentration that can be detected was 0.5 fM. Compared with conventional electrochemical biosensors for multiplex immunoassays, for the size-resolved SECBS, one does not need to worry about potential overlapping. Therefore, the proposed method demonstrates a promising potential for the application of SECBS in multiplex immunoassays.
Collapse
Affiliation(s)
- Yi-Yan Bai
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Yan-Ju Yang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Zhen Wu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Xiao-Yan Yang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Miao Lin
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Dai-Wen Pang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Zhi-Ling Zhang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| |
Collapse
|
5
|
Chen S, Chen Y, Xu Y, Chen W, Chen S, Hu L, Boulon G. Complexation-association-extraction spectrophotometric determination of Pt cations based on a multi-reagent analytical system with I - anions and 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]vinyl]-1,3,3-trimethyl-3H-indolium cations. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:5367-5379. [PMID: 33107867 DOI: 10.1039/d0ay01647k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A new multi-reagent analytical system with 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]vinyl]-1,3,3-trimethyl-3H-indolium chloride (CPVTI), which is a styryl hemicyanine cationic dye with good photostability and a high molar absorption coefficient, as its core is first established and utilized successfully to determine the content of Pt ions via a spectrophotometric method. The process involves two treatment steps: adding CPVTI and I solutions to the Pt solution to be detected, and then using butyl acetate for vortex liquid-liquid extraction. A Pt cation can be incorporated into the CPVTI cation with the help of an I- anion, initially converting the Pt cation into a [PtI6]2- complex anion. After forming a [PtI62-·2CPVTI+](aq) ion associate in the aqueous phase, the Pt cation can be extracted selectively by butyl acetate with maximum extraction efficiency, and exists as [PtI62-·2CPVTI+](org) in the extract phase. Via the formation of the iodo-complex of Pt and its ion associate with CPVTI, and the extraction with butyl acetate, Pt is selectively partitioned into the butyl acetate extractant in a step-by-step manner with good interference resistance. In the CPVTI-Pt-I analytical system, the charge state of CPVTI is retained by adjustment with H2SO4; the monovalent CPVTI+ presents a strong spectrophotometric absorbance signal at 530 nm with long-term stability, which allows determination of the Pt content. The system shows a high molar absorption coefficient of 6.52 × 104 L mol-1 cm-1 at 530 nm, a lower limit of detection of 0.07 mg L-1, and a good Sandell's sensitivity of 0.0030 μg cm-2. Mechanistic analysis of the establishment of the system, concentration optimization, standard working curve, system sensitivity and stability, resistance against interference from diverse metal ions, and practical applications are investigated and discussed.
Collapse
Affiliation(s)
- Si Chen
- Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
| | | | | | | | | | | | | |
Collapse
|
6
|
Tymoshuk O, Oleksiv L, Rydchuk P, Chaban T, Tymoshuk S, Matiychuk V. Spectrophotometric Study of the Interaction of Pplatinum(IV) with New Derivatives of Azolidones. CHEMISTRY & CHEMICAL TECHNOLOGY 2020. [DOI: 10.23939/chcht14.02.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
7
|
Gómez-Monedero B, González-Sánchez MI, Iniesta J, Agrisuelas J, Valero E. Design and Characterization of Effective Ag, Pt and AgPt Nanoparticles to H₂O₂ Electrosensing from Scrapped Printed Electrodes. SENSORS 2019; 19:s19071685. [PMID: 30970580 PMCID: PMC6479472 DOI: 10.3390/s19071685] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/06/2019] [Accepted: 04/08/2019] [Indexed: 11/19/2022]
Abstract
The use of disposable screen-printed electrodes (SPEs) has extraordinarily grown in the last years. In this paper, conductive inks from scrapped SPEs were removed by acid leaching, providing high value feedstocks suitable for the electrochemical deposition of Ag, Pt and Ag core-Pt shell-like bimetallic (AgPt) nanoparticles, onto screen-printed carbon electrodes (ML@SPCEs, M = Ag, Pt or AgPt, L = metal nanoparticles from leaching solutions). ML@SPCEs were characterized by scanning electron microscopy, cyclic voltammetry and electrochemical impedance spectroscopy. The results were compared to those obtained when metal nanoparticles were synthesised using standard solutions of metal salts (MS@SPCEs). Both ML@SPCEs and MS@SPCEs exhibited similar cyclic voltammetric patterns referred to the electrochemical stripping of silver or the adsorption/desorption of hydrogen/anions in the case of platinum, proving leaching solutions extremely effective for the electrodeposition of metallic nanoparticles. The use of both ML@SPCEs and MS@SPCEs proved effective in enhancing the sensitivity for the detection of H₂O₂ in phosphate buffer solutions (pH = 7). The AgPtL@SPCE was used as proof of concept for the validation of an amperometric sensor for the determination of H₂O₂ within laundry boosters and antiseptic samples. The electrochemical sensor gave good agreement with the results obtained by a spectrophotometric method with H₂O₂ recoveries between 100.6% and 106.4%.
Collapse
Affiliation(s)
- Beatriz Gómez-Monedero
- Department of Physical Chemistry, Higher Technical School of Industrial Engineering, University of Castilla-La Mancha, Campus Universitario s/n, 02071 Albacete, Spain.
| | - María-Isabel González-Sánchez
- Department of Physical Chemistry, Higher Technical School of Industrial Engineering, University of Castilla-La Mancha, Campus Universitario s/n, 02071 Albacete, Spain.
| | - Jesús Iniesta
- Department of Physical Chemistry, Institute of Electrochemistry, University of Alicante, 03690 San Vicente del Raspeig, Alicante, Spain.
| | - Jerónimo Agrisuelas
- Department of Physical Chemistry, Faculty of Chemistry, University of Valencia, Dr Moliner 50, 46100 Burjassot, Valencia, Spain.
| | - Edelmira Valero
- Department of Physical Chemistry, Higher Technical School of Industrial Engineering, University of Castilla-La Mancha, Campus Universitario s/n, 02071 Albacete, Spain.
| |
Collapse
|
8
|
Yousif AM, Labib SA, Ibrahim I, Atia AA. Recovery of Pt (IV) from aqueous solutions using magnetic functionalized cellulose with quaternary amine. SEP SCI TECHNOL 2018. [DOI: 10.1080/01496395.2018.1534866] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Ahmed M. Yousif
- Chemistry Department, Menoufia University, Shebin El-Kom, Egypt
| | - Sherif A. Labib
- Chemistry Department, Menoufia University, Shebin El-Kom, Egypt
| | - I.A. Ibrahim
- Chemistry Department, Central Metallurgical Research and Development Institute, Helwan, Cairo, Egypt
| | - Asem A. Atia
- Chemistry Department, Menoufia University, Shebin El-Kom, Egypt
| |
Collapse
|
9
|
Simultaneous determination of traces of Pt, Pd, and Ir by SPE-ICP-OES. Test for chemical vapor generation. Microchem J 2016. [DOI: 10.1016/j.microc.2015.07.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
10
|
Asghar BH, Altass HM, Fawzy A. Transition metal-catalyzed oxidation of l-asparagine by platinum(IV) in acid medium: a kinetic and mechanistic study. TRANSIT METAL CHEM 2015. [DOI: 10.1007/s11243-015-9951-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
11
|
Fawzy A, Asghar BH. Kinetics and mechanism of uncatalyzed and silver(I)-catalyzed oxidation of l-histidine by hexachloroplatinate(IV) in acid medium. TRANSIT METAL CHEM 2015. [DOI: 10.1007/s11243-015-9916-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
12
|
FAWZY AHMED. Kinetics and Mechanistic Approach to the Oxidative Behavior of Biological Anticancer Platinum(IV) Complex toward -Asparagine in Acid Medium and the Effect of Copper(II) Catalyst. INT J CHEM KINET 2014. [DOI: 10.1002/kin.20886] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- AHMED FAWZY
- Chemistry Department; Faculty of Science; Assiut University; Assiut 71516 Egypt
- Chemistry Department; Faculty of Applied Sciences; Umm Al-Qura University; Makkah Al-Mukarramah 13401 Saudi Arabia Kingdom
| |
Collapse
|
13
|
Fawzy A. Influence of copper(II) catalyst on the oxidation of l-histidine by platinum(IV) in alkaline medium: a kinetic and mechanistic study. TRANSIT METAL CHEM 2014. [DOI: 10.1007/s11243-014-9834-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
14
|
Ghosh S, Khamarui S, Gayen KS, Maiti DK. ArCH(OMe)₂--a Pt(IV)-catalyst originator for diverse annulation catalysis. Sci Rep 2013; 3:2987. [PMID: 24136161 PMCID: PMC3798883 DOI: 10.1038/srep02987] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Accepted: 09/30/2013] [Indexed: 02/07/2023] Open
Abstract
We discover an important property of a small molecule ArCH(OMe)2 which transforms catalytically inactive PtIIBr2 procatalyst in situ to an powerful catalyst PtIV-species for diverse annulation reaction. The powerful catalytic system enables selective activation of C2-H/N-H and C2-H/C4-H of acetoacetanilide and C = O/C≡C of substituted butyne-1,2-dione for C-C/C-N, C-C/C-C and C-O/C-O bond-forming inter- and intramolecular annulation towards direct syntheses of functionalised 2-pyridones, cyclohexenones and 3(2H)-furanones respectively. In contrast to the common ligand, herein highly labile C-OMe bond of ArCH(OMe)2 is expected to react with PtBr2 towards generation of the high-valent active catalyst. Unlike catalyst promoter or initiator, the reaction does not occur with PtBr2 in the absence of ArCH(OMe)2. In situ generation of PtIV-species and -OMe fragment of ArCH(OMe)2 were confirmed from the UV-vis characteristic peaks about 260 nm and trapping of -OMe group respectively. These observations provide new prospects and perspectives in catalysis for innovative catalyst design.
Collapse
Affiliation(s)
- Subhadeep Ghosh
- Department of Chemistry, University of Calcutta, University College of Science, 92 A. P. C. Road, Kolkata-700009, India
| | | | | | | |
Collapse
|
15
|
Chave T, Grunenwald A, Ayral A, Lacroix-Desmazes P, Nikitenko SI. Sonochemical deposition of platinum nanoparticles on polymer beads and their transfer on the pore surface of a silica matrix. J Colloid Interface Sci 2012; 395:81-4. [PMID: 23347995 DOI: 10.1016/j.jcis.2012.12.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 12/13/2012] [Accepted: 12/15/2012] [Indexed: 10/27/2022]
Abstract
This study reported the sonochemical deposition of platinum on the surface of polystyrene beads (PSBs) and the transfer of obtained Pt nanoparticles into a porous silica matrix using the PSB as a sacrificial template. Platinum nanoparticle deposition was ensured by the sonochemical reduction of Pt(IV) at room temperature in latex solutions containing polystyrene beads in the presence of formic acid under Ar or under Ar/CO atmosphere without any additives. After ultrasonic treatments for few hours, well dispersed Pt nanoparticles within the range of 3-5 nm deposited on PSB were obtained in both studied conditions. Samples were then mixed with TEOS, dried, and heated at 450°C to ensure the PSB removal from the silica matrix. TEM and SEM results clearly show that final silica pore size is within the same order of magnitude than initial PSB. Finally, platinum decorated silica matrix with chosen pore sizes was successfully prepared.
Collapse
Affiliation(s)
- Tony Chave
- Laboratoire de Sonochimie dans les Fluides Complexes, Institut de Chimie Séparative de Marcoule (ICSM), UMR 5257-CEA-CNRS-UMII-ENSCM, Centre de Marcoule, Bagnols sur Cèze, France.
| | | | | | | | | |
Collapse
|
16
|
Chave T, Navarro NM, Nitsche S, Nikitenko SI. Mechanism of Pt(IV) sonochemical reduction in formic acid media and pure water. Chemistry 2012; 18:3879-85. [PMID: 22362626 DOI: 10.1002/chem.201102355] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Indexed: 11/11/2022]
Abstract
Sonochemical synthesis of platinum nanoparticles (Pt NPs) in formic acid solutions and pure water was investigated using a 20 kHz ultrasonic irradiation. The obtained results gave new insights on the underneath Pt(IV) reduction mechanism in formic acid media under argon and in pure water under Ar/CO atmosphere. It was shown that in pure water sonochemical reduction of platinum ions occurs by hydrogen issued from homolytic water molecule split. Pt(IV) ion reduction appears to be a very slow process under argon atmosphere in pure water due to formation of oxidizing species like OH radicals and H(2)O(2) leading to reoxidation of intermediate Pt(II) ions. Sonochemical reduction is accelerated manifold in the presence of formic acid or Ar/CO gas mixture. Solution and gas-phase analyses reveal that both CO and HCOOH act as OH(.) radical scavenger and reducing agent under ultrasonic irradiation. Their ability to reduce platinum ions at room temperature is enhanced due to the local heating in the liquid shell surround the cavitation bubble. An innovative synthesis route for monodispersed Pt NPs in pure water without any templates or capping agents in the presence of Ar/CO gas mixture is then proposed. Obtained Pt NPs within the range of 2-3 nm exhibited a strong stability towards sedimentation in water. Since Ar/CO atmosphere is the only restriction of the process, this procedure can be applied in various media and is also compatible with a large array of experimental conditions.
Collapse
Affiliation(s)
- Tony Chave
- Laboratoire de Sonochimie dans les Fluides Complexes, Institut de Chimie Séparative de Marcoule (ICSM), UMR 5257-CEA-CNRS-UMII-ENSCM, Centre de Marcoule, BP 17171, 30207 Bagnols sur Cèze cedex, France.
| | | | | | | |
Collapse
|
17
|
Virot M, Chave T, Horlait D, Clavier N, Dacheux N, Ravaux J, Nikitenko SI. Catalytic dissolution of ceria under mild conditions. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31996a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
18
|
Tang B, Zhang N, Chen ZZ, Kong QC. Determination of trace platinum by supramolecular catalytic kinetic spectrofluorimetry of β–cyclodextrin–platinum–KBrO3–salicylaldehyde furfuralhydrazone. Anal Bioanal Chem 2006; 384:769-73. [PMID: 16435093 DOI: 10.1007/s00216-005-0172-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2005] [Revised: 08/13/2005] [Accepted: 10/11/2005] [Indexed: 10/25/2022]
Abstract
A supramolecular catalytic kinetic spectrofluorimetric method was developed for the determination of platinum(IV) and the possible mechanism of catalytic reaction was discussed. The method was based on the fluorescence-enhancing reaction of salicylaldehyde furfuralhydrazone (SAFH) with potassium bromate, which was catalysed by platinum(IV) in a water-ethanol medium. beta-Cyclodextrin (beta-CD) obviously sensitized the determination at pH 5.20 and 25 degrees C. Under optimum conditions, the beta-CD-platinum-KBrO3-SAFH supramolecular kinetic catalytic reaction system had excitation and emission maxima at 372 and 461 nm, respectively. The linear range of this method was 0.60-180 ng ml-1 with a relative standard deviation of 1.2%, and the detection limit was 0.18 ng ml-1. Investigation of the mechanism and the effects of interferences is presented. The proposed method was applied successfully to determine trace platinum(IV) in the chemotherapeutic drug cisplatin and serum from patients with satisfactory results.
Collapse
Affiliation(s)
- Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, People's Republic of China.
| | | | | | | |
Collapse
|
19
|
Zadvorny OA, Zorin NA, Gogotov IN. Transformation of metals and metal ions by hydrogenases from phototrophic bacteria. Arch Microbiol 2005; 184:279-85. [PMID: 16283252 DOI: 10.1007/s00203-005-0040-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2005] [Revised: 08/25/2005] [Accepted: 08/30/2005] [Indexed: 10/25/2022]
Abstract
The ability of hydrogenases isolated from Thiocapsa roseopersicina and Lamprobacter modestohalophilus to reduce metal ions and oxidize metals has been studied. Hydrogenases from both phototrophic bacteria oxidized metallic Fe, Cd, Zn and Ni into their ionic forms with simultaneous evolution of molecular hydrogen. The metal oxidation rate decreased in the series Zn > Fe > Cd > Ni and depended on the pH. The presence of methyl viologen in the reaction system accelerated this process. T. roseopersicina and L. modestohalophilus cells and their hydrogenases reduced Ni(II), Pt(IV), Pd(II) or Ru(III) to their metallic forms under H2 atmosphere. These results suggest that metals or metal ions can serve as electron donors or acceptors for hydrogenases from phototrophic bacteria.
Collapse
Affiliation(s)
- Oleg A Zadvorny
- Institute of Basic Biological Problems of RAS, 142290 Pushchino, Russia
| | | | | |
Collapse
|
20
|
Patel KS, Shrivash K, Sharma PC, Pandey M, Hoffmann # P. Simple and Selective Method for Determination of Platinum with Tin(II) Chloride and Amides. ANAL LETT 2004. [DOI: 10.1081/al-120039438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|