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Padma M, Shyamala P, Bhargavi K, Nagalakshmi KV. Kinetics of Base Hydrolysis of Bis(2,2' : 6',2''-Terpyridine)Iron(II) Complex in the Water Pools of CTAB Reverse Micelles. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2021. [DOI: 10.1134/s1990793121060221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Mandal HK, Patel BK, Saha S, Saha S, Mahapatra A. Effect of cyclodextrins’ cavity on the kinetics of alkaline hydrolysis of tris(1,10-Phenanthroline)Fe(II) in presence of surfactant. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1993891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Biman Kumar Patel
- Department of Chemistry, Jadavpur University, Kolkata, West Bengal, India
| | - Suman Saha
- Department of Chemistry, Jadavpur University, Kolkata, West Bengal, India
| | - Sushanta Saha
- Department of Chemistry, Sree Chaitanya College, Habra, West Bengal, India
| | - Ambikesh Mahapatra
- Department of Chemistry, Jadavpur University, Kolkata, West Bengal, India
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Mandal HK, Patel BK, Dasmandal S, Mahapatra A. Kinetic investigations on the alkaline hydrolysis of tris-(1,10-phenenthroline)Fe(II) with guar gum–surfactant interactions. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2017.1334564] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | - Biman Kumar Patel
- Department of Chemistry, Jadavpur University, Kolkata, West Bengal, India
| | - Somnath Dasmandal
- Department of Chemistry, Jadavpur University, Kolkata, West Bengal, India
| | - Ambikesh Mahapatra
- Department of Chemistry, Jadavpur University, Kolkata, West Bengal, India
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Base hydrolysis of tris(3-(2-pyridyl)-5,6-bis(4-phenyl sulphonic acid)-1,2,4-triazine)iron(II) in aqueous, SDS and CTAB media: kinetic and mechanistic study. TRANSIT METAL CHEM 2017. [DOI: 10.1007/s11243-017-0179-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Bellam R, Raju GG, Anipindi NR, Jaganyi D. Kinetics and mechanism of base hydrolysis of tris(3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine)iron(II) in aqueous and micellar media. TRANSIT METAL CHEM 2015. [DOI: 10.1007/s11243-015-0018-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ebaid Nassr LAM. Reactivity Tracers of the Hydrolysis of Fe(II)-Bis(salicylidene) Complexes: Initial-Transition States Analysis and Enhanced Impact of Tensides on the Kinetic Trends. INT J CHEM KINET 2015. [DOI: 10.1002/kin.20970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Mandal HK, Dasmandal S, Mahapatra A. Micellar and Mixed-Micellar Effects on Alkaline Hydrolysis oftris(1,10–phenanthroline)iron(II): Kinetic Exploration. J DISPER SCI TECHNOL 2015. [DOI: 10.1080/01932691.2015.1050730] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Nassr LAME, Abu-Dief AM. Kinetic Screening for the Acid-Catalyzed Hydrolysis of Some Hydrophobic Fe(II) Schiff Base Amino Acid Chelates and Reactivity Trends in the Presence of Alkali Halide and Surfactant. INT J CHEM KINET 2015. [DOI: 10.1002/kin.20927] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Ahmed M. Abu-Dief
- Chemistry Department; Faculty of Science; Sohag University; 82524 Sohag Egypt
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Morales J, Moldes O, Cid A, Astray G, Mejuto J. Cleavage of Carbofuran and Carbofuran-Derivatives in Micellar Aggregates. PROGRESS IN REACTION KINETICS AND MECHANISM 2015. [DOI: 10.3184/146867815x14259195615547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In recent years, the stability of carbamate pesticides have been studied by our research group in a wide range of biomimetic microheterogeneous media such as micelles or reverse micelles. These microheterogeneous media included different surfactant species and, hence, different self-assembled structures. In particular, basic hydrolysis of carbofuran and its derivatives have been analysed in the presence of anionic, cationic, non-ionic and reverse micelles. The results obtained from these physicochemical and kinetic studies, as well as a consistent comparison of them, are now summarised.
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Affiliation(s)
- J. Morales
- Physical Chemistry Department, Faculty of Sciences, University of Vigo, 32004, Ourense, Spain
| | - O.A. Moldes
- Physical Chemistry Department, Faculty of Sciences, University of Vigo, 32004, Ourense, Spain
| | - A. Cid
- Chemistry Department, REQUIMTE-CQFB, Faculty of Sciences and Technology, University Nova of Lisbon, 2829-516, Monte de Caparica, Portugal
| | - G. Astray
- Physical Chemistry Department, Faculty of Sciences, University of Vigo, 32004, Ourense, Spain
- Department of Geological Sciences, College of Arts and Sciences, Ohio University, 45701 Athens, USA
| | - J.C. Mejuto
- Physical Chemistry Department, Faculty of Sciences, University of Vigo, 32004, Ourense, Spain
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Kinetic investigations on alkaline fading of malachite green in the presence of micelles and reverse micelles. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2013.12.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Wang F, Gomez-Escudero A, Ramireddy RR, Murage G, Thayumanavan S, Vachet RW. Electrostatic control of peptide side-chain reactivity using amphiphilic homopolymer-based supramolecular assemblies. J Am Chem Soc 2013; 135:14179-88. [PMID: 23971726 PMCID: PMC3836672 DOI: 10.1021/ja404940s] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Supramolecular assemblies formed by amphiphilic homopolymers with negatively charged groups in the hydrophilic segment have been designed to enable high labeling selectivity toward reactive side chain functional groups in peptides. The negatively charged interiors of the supramolecular assemblies are found to block the reactivity of protonated amines that would otherwise be reactive in aqueous solution, while maintaining the reactivity of nonprotonated amines. Simple changes to the pH of the assemblies' interiors allow control over the reactivity of different functional groups in a manner that is dependent on the pKa of a given peptide functional group. The labeling studies carried out in positively charged supramolecular assemblies and free buffer solution show that, even when the amine is protonated, labeling selectivity exists only when complementary electrostatic interactions are present, thereby demonstrating the electrostatically controlled nature of these reactions.
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Affiliation(s)
- Feng Wang
- Department of Chemistry, University of Massachusetts, Amherst, MA 01003
| | | | | | - Gladys Murage
- Department of Chemistry, University of Massachusetts, Amherst, MA 01003
| | - S. Thayumanavan
- Department of Chemistry, University of Massachusetts, Amherst, MA 01003
| | - Richard W. Vachet
- Department of Chemistry, University of Massachusetts, Amherst, MA 01003
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Ghosh A, Saha R, Ghosh SK, Mukherjee K, Saha B. Suitable combination of promoter and micellar catalyst for kilo fold rate acceleration on benzaldehyde to benzoic acid conversion in aqueous media at room temperature: a kinetic approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 109:55-67. [PMID: 23501718 DOI: 10.1016/j.saa.2013.02.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 02/05/2013] [Accepted: 02/06/2013] [Indexed: 06/01/2023]
Abstract
The kinetics of oxidation of benzaldehyde by chromic acid in aqueous and aqueous surfactant (sodium dodecyl sulfate, SDS, alkyl phenyl polyethylene glycol, Triton X-100 and N-cetylpyridinium chloride, CPC) media have been investigated in the presence of promoter at 303 K. The pseudo-first-order rate constants (kobs) were determined from a logarithmic plot of absorbance as a function time. The rate constants were found to increase with introduction of heteroaromatic nitrogen base promoters such as Picolinic acid (PA), 2,2'-bipyridine (bipy) and 1,10-phenanthroline (phen). The product benzoic acid has been characterized by conventional melting point experiment, NMR, HRMS and FTIR spectral analysis. The mechanism of both unpromoted and promoted reaction path has been proposed for the reaction. In presence of the anionic surfactant SDS, cationic surfactant CPC and neutral surfactant TX-100 the reaction can undergo simultaneously in both aqueous and micellar phase with an enhanced rate of oxidation in the micellar phase. Both SDS and TX-100 produce normal micellar effect whereas CPC produce reverse micellar effect in the presence of benzaldehyde. The observed net enhancement of rate effects has been explained by considering the hydrophobic and electrostatic interaction between the surfactants and reactants. SDS and bipy combination is the suitable one for benzaldehyde oxidation.
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Affiliation(s)
- Aniruddha Ghosh
- Homogeneous Catalysis Laboratory, Department of Chemistry, The University of Burdwan, Golapbag, Burdwan, 713 104 WB, India
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