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Bagherzadeh M, Zare M. Synthesis, characterization, and catalysis of recyclable new piperazine-bridged Mo(VI) polymers [MoO2(Salen)(piperazine)]n in highly selective oxygenation of alkenes and sulfides. J COORD CHEM 2013. [DOI: 10.1080/00958972.2013.818671] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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152
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Amini M, Bagherzadeh M, Eftekhari-Sis B, Ellern A, Keith Woo L. Catalytic efficacy of an oxido-peroxido tungsten(VI) complex: synthesis, X-ray structure and oxidation of sulfides and olefins. J COORD CHEM 2013. [DOI: 10.1080/00958972.2013.794383] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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153
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Bagherzadeh M, Zare M, Amani V, Ellern A, Keith Woo L. Dioxo and oxo-peroxo molybdenum(VI) complexes bearing salicylidene 2-picoloyl hydrazone: Structures and catalytic performances. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.01.054] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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154
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Amini M, Bagherzadeh M, Moradi-Shoeili Z, Boghaei DM, Ellern A, Woo LK. Selective oxidation of sulfides and olefins by a manganese(III) complex containing an N,O-type bidentate oxazine ligand. J COORD CHEM 2013. [DOI: 10.1080/00958972.2012.761339] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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155
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Najafpour MM, Amini M, Sedigh DJ, Rahimi F, Bagherzadeh M. Activated layered manganese oxides with deposited nano-sized gold or silver as an efficient catalyst for epoxidation of olefins. RSC Adv 2013. [DOI: 10.1039/c3ra45004j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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156
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Moradi-Shoeili Z, Boghaei DM, Amini M, Bagherzadeh M, Notash B. New molybdenum(VI) complex with ONS-donor thiosemicarbazone ligand: Preparation, structural characterization, and catalytic applications in olefin epoxidation. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2012.10.016] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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157
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Bagherzadeh M, Heydari M. Electrochemical detection of dopamine based on pre-concentration by graphene nanosheets. Analyst 2013; 138:6044-51. [DOI: 10.1039/c3an01318a] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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158
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Bagherzadeh M, Zare M. Synthesis and characterization of NaY zeolite-encapsulated Mn-hydrazone Schiff base: an efficient and reusable catalyst for oxidation of olefins. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.731595] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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159
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Bagherzadeh M, Haghdoost MM, Amini M, Derakhshandeh PG. Molybdenum oxo–peroxo complex: A very fast catalyst for oxidation and reduction of sulfur-based compounds. CATAL COMMUN 2012. [DOI: 10.1016/j.catcom.2012.02.026] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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160
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Mazloum-Ardakani M, Manshadi AD, Bagherzadeh M, Kargar H. Impedimetric and Potentiometric Investigation of a Sulfate Anion-Selective Electrode: Experiment and Simulation. Anal Chem 2012; 84:2614-21. [DOI: 10.1021/ac203260e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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161
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Bagherzadeh M, Haghdoost MM, Shahbazirad A. Nanoparticle supported, magnetically separable vanadium complex as catalyst for selective oxidation of sulfides. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.657188] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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162
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Amini M, Najafpour MM, Nayeri S, Pashaei B, Bagherzadeh M. Nano-layered manganese oxides as low-cost, easily synthesized, environmentally friendly and efficient catalysts for epoxidation of olefins. RSC Adv 2012. [DOI: 10.1039/c2ra20297b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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163
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Bagherzadeh M, Ghazali-Esfahani S. Efficient recyclable catalytic system for deoxygenation of sulfoxides: catalysis of ionic liquid-molybdenum complexes in ionic liquid solution. NEW J CHEM 2012. [DOI: 10.1039/c2nj21001k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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164
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Najafpour MM, Rahimi F, Amini M, Nayeri S, Bagherzadeh M. A very simple method to synthesize nano-sized manganese oxide: an efficient catalyst for water oxidation and epoxidation of olefins. Dalton Trans 2012; 41:11026-31. [DOI: 10.1039/c2dt30553d] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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165
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Najafpour MM, Hillier W, Shamkhali AN, Amini M, Beckmann K, Jagličić Z, Jagodič M, Strauch P, Moghaddam AN, Beretta G, Bagherzadeh M. Synthesis, characterization, DFT studies and catalytic activities of manganese(ii) complex with 1,4-bis(2,2′:6,2′′-terpyridin-4′-yl) benzene. Dalton Trans 2012; 41:12282-8. [DOI: 10.1039/c2dt31544k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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166
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Amini M, Bagherzadeh M, Moradi-Shoeili Z, Boghaei DM. Pd(OAc)2 without added ligand as an active catalyst for Mizoroki–Heck reaction in aqueous media. RSC Adv 2012. [DOI: 10.1039/c2ra21459h] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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167
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Bagherzadeh M, Zare M. Oxidation of sulfides with urea–hydrogen peroxide catalyzed by iron–salen complexes. J Sulphur Chem 2011. [DOI: 10.1080/17415993.2011.593634] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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168
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Memarian HR, Soleymani M, Sabzyan H, Bagherzadeh M, Ahmadi H. Voltammetric oxidation of 2-oxo-1,2,3,4-tetrahydropyrimidin-5-carboxamides: substituent effects. J Phys Chem A 2011; 115:8264-70. [PMID: 21667977 DOI: 10.1021/jp2014435] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electrochemical oxidation of a series of 20 substituted 2-oxo-1,2,3,4-tetrahydropyrimidin-5-carboxamides (THPMs) in acetonitrile has been studied using voltammetric methods at a glassy carbon electrode to investigate the influence of the substituents on the 4- and 5-positions of the heterocyclic ring. Analysis of the results shows that the electronic nature and steric hindrance of the substituents, especially their orientations toward the heterocyclic ring, determine their effects on the oxidation potential. Analysis of the computational results obtained at the DFT-B3LYP/6-31++G** level of theory suggests a mechanism in which the first electron removal occurs from either the N(1) of the heterocyclic ring or N(17) of the amide substitution. This process is followed by a fast proton removal resulting in the formation of stable allylic and/or benzylic radicals which then undergo further oxidation to the 2-oxo-1,2-dihydropyrimidin-5-carboxamides (DHPMs).
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169
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Bagherzadeh M, Amini M, Boghaei DM, Najafpour MM, McKee V. Synthesis, X-ray structure, characterization and catalytic activity of a polymeric manganese(II) complex with iminodiacetate. Appl Organomet Chem 2011. [DOI: 10.1002/aoc.1802] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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170
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Bagherzadeh M, Amini M. A new vanadium Schiff base complex as catalyst for oxidation of alcohols. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.520316] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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171
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Najafpour MM, Hołyńska M, Amini M, Kazemi SH, Lis T, Bagherzadeh M. Two new silver(I) complexes with 2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz): Preparation, characterization, crystal structure and alcohol oxidation activity in the presence of oxone. Polyhedron 2010. [DOI: 10.1016/j.poly.2010.07.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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172
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Shervedani R, Siadat-Barzoki S, Bagherzadeh M. Electrochemical Characterization of Gold 6-Amino-2-mercaptobenzothiazole Self-Assembled Monolayer for Dopamine Detection in Pharmaceutical Samples. ELECTROANAL 2010. [DOI: 10.1002/elan.200900327] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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173
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Latifi R, Bagherzadeh M, de Visser SP. Origin of the correlation of the rate constant of substrate hydroxylation by nonheme iron(IV)-oxo complexes with the bond-dissociation energy of the C-H bond of the substrate. Chemistry 2009; 15:6651-62. [PMID: 19472231 DOI: 10.1002/chem.200900211] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Mononuclear nonheme iron containing systems are versatile and vital oxidants of substrate hydroxylation reactions in many biosystems, whereby the rate constant of hydroxylation correlates with the strength of the C-H bond that is broken in the process. The thermodynamic reason behind these correlations, however, has never been established. In this work results of a series of density functional theory calculations of substrate hydroxylation by a mononuclear nonheme iron(IV)-oxo oxidant with a 2 His/1 Asp structural motif analogous to alpha-ketoglutarate dependent dioxygenases are presented. The calculations show that these oxidants are very efficient and able to hydroxylate strong C-H bonds, whereby the hydrogen abstraction barriers correlate linearly with the strength of the C-H bond of the substrate that is broken. These trends have been rationalized using a valence bond (VB) curve-crossing diagram, which explains the correlation using electron transfer mechanisms in the hydrogen abstraction processes. We also rationalized the subsequent reaction step for radical rebound and show that the barrier is proportional to the electron affinity of the iron(III)-hydroxo intermediate complex. It is shown that nonheme iron(IV)-hydroxo complexes have a larger electron affinity than heme iron(IV)-hydroxo complexes and therefore also experience larger radical rebound barriers, which may have implications for product distributions and rearrangement reactions. Thus, detailed comparisons between heme and nonheme iron(IV)-oxo oxidants reveal the fundamental differences in monoxygenation capabilities of these important classes of oxidants in biosystems and synthetic analogues for the first time and enable us to make predictions of experimental processes.
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174
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Shervedani RK, Bagherzadeh M, Sabzyan H, Safari R. One-impedance for one-concentration impedimetry as an electrochemical method for determination of the trace zirconium ion. J Electroanal Chem (Lausanne) 2009. [DOI: 10.1016/j.jelechem.2009.05.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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175
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Bagherzadeh M, Latifi R, Tahsini L, Amani V, Ellern A, Keith Woo L. Synthesis, characterization and crystal structure of a dioxomolybdenum(VI) complex with a N,O type bidentate Schiff base ligand as a catalyst for homogeneous oxidation of olefins. Polyhedron 2009. [DOI: 10.1016/j.poly.2009.05.036] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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176
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Bagherzadeh M, Tahsini L, Latifi R, Keith Woo L. cis-Dioxo-molybdenum(VI)-oxazoline complex catalyzed epoxidation of olefins by tert-butyl hydrogen peroxide. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.04.030] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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177
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Bagherzadeh M, Tahsini L, Latifi R, Amani V, Ellern A, Keith Woo L. Synthesis, X-ray structure and study of a mixed ligand iron(III) complex with tridentate Schiff base as a homogeneous catalyst in the efficient oxidation of sulfides. INORG CHEM COMMUN 2009. [DOI: 10.1016/j.inoche.2009.03.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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178
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Tahsini L, Bagherzadeh M, Nam W, de Visser SP. Fundamental Differences of Substrate Hydroxylation by High-Valent Iron(IV)-Oxo Models of Cytochrome P450. Inorg Chem 2009; 48:6661-9. [DOI: 10.1021/ic900593c] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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179
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Shervedani RK, Yaghoobi F, Bagherzadeh M. Electrocatalytic determination of hydroquinone with Mn+ modified gold-5-amino-2-mercaptobenzimidazole self-assembled monolayer electrodes. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2009. [DOI: 10.1007/bf03246508] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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180
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Bagherzadeh M, Amini M. Synthesis, characterization and catalytic study of a novel iron(III)-tridentate Schiff base complex in sulfide oxidation by UHP. INORG CHEM COMMUN 2009. [DOI: 10.1016/j.inoche.2008.10.023] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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181
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Bagherzadeh M, Latifi R, Tahsini L, Amini M. Catalytic oxidation of sulfides to sulfoxide using manganese(III) complexes with bidentate O,N-donor oxazoline ligand and UHP oxidizing agent. CATAL COMMUN 2008. [DOI: 10.1016/j.catcom.2008.08.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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182
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Joshaghani M, Bahadori M, Rafiee E, Bagherzadeh M. Oxidative transformation of organic compounds using bis(1,10-phenanthroline)silver(II) peroxydisulfate as a twin catalyst/oxidant. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2008. [DOI: 10.1007/bf03246498] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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183
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Latifi R, Bagherzadeh M, Milne BF, Jaspars M, de Visser SP. Density functional theory studies of oxygen and carbonate binding to a dicopper patellamide complex. J Inorg Biochem 2008; 102:2171-8. [PMID: 18930320 DOI: 10.1016/j.jinorgbio.2008.08.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2008] [Revised: 08/20/2008] [Accepted: 08/22/2008] [Indexed: 11/16/2022]
Abstract
In this work we present results of density functional theory (DFT) calculations on dicopper patellamides and their affinity for molecular oxygen and carbonate. Patellamides are cyclic octapeptides that are produced by a cyanobacterium, and may show promise as therapeutics. Thus, carbonate binding to a dicopper patellamide center gives a stable cyclic octapeptide with a twist of almost 90 degrees . The system exists in close-lying open-shell singlet and triplet spin states with two unpaired electrons in orthogonal sigma* orbitals on each metal center. Subsequently, we replaced carbonate with dioxygen and found a stable Cu2(mu-O)2 diamond shaped patellamide core. In this structure the original dioxygen bond is significantly weakened to essentially a single bond, which should enable the system to transfer these oxygen atoms to substrates. We predicted the IR and Raman spectra of the Cu2(mu-O)2 diamond shaped patellamide structure using density functional theory and found a considerable isotope effect on the O-O stretch vibration for 16O2 versus 18O2 bound structures. Our studies reveal that carbonate forms an extremely stable complex with dicopper patellamide, but that additional molecular oxygen to this system does not give a potential oxidant. Therefore, it is more likely that carbonate prepares the system for dioxygen binding by folding it into the correct configuration followed in the proposed catalytic cycle by a protonation event preceding dioxygen binding to enable the system to reorganize to form a stable Cu2(mu-O)2-patellamide cluster. Alternatively, carbonate may act as an inhibitor that blocks the catalytic activity of the system. It is anticipated that the Cu2(mu-O)2-patellamide structure is a potential active oxidant of the dicopper patellamide complex.
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184
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Shervedani RK, Bagherzadeh M. Hydroxamation of gold surface via in-situ layer-by-layer functionalization of cysteamine self-assembled monolayer: Preparation and electrochemical characterization. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2008.04.051] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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185
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Bagherzadeh M, Tahsini L, Latifi R, Ellern A, Woo LK. Synthesis, crystal structure and catalytic activity of a novel Mo(VI)–oxazoline complex in highly efficient oxidation of sulfides to sulfoxides by urea hydrogen peroxide. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2007.10.017] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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186
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Bagherzadeh M, Tahsini L, Latifi R. Efficient oxidation of olefins and sulfides catalyzed by manganese(III)-tridentate Schiff base complex using UHP as oxidant. CATAL COMMUN 2008. [DOI: 10.1016/j.catcom.2008.01.020] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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187
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Shervedani R, Bagherzadeh M. Electrochemical Characterization of In Situ Functionalized Gold Cysteamine Self-Assembled Monolayer with 4-Formylphenylboronic Acid for Detection of Dopamine. ELECTROANAL 2008. [DOI: 10.1002/elan.200704096] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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188
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Joshaghani M, Bahadori M, Rafiee E, Bagherzadeh M. Oxidative transformation of organic compounds using bis(bipyridine)silver(II) peroxydisulfate. ARKIVOC 2008. [DOI: 10.3998/ark.5550190.0008.g26] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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189
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Zolfigol MA, Bagherzadeh M, Mallakpour S, Chehardoli G, Ghorbani-Choghamarani A, Koukabi N, Dehghanian M, Doroudgar M. The first report on the catalytic oxidation of urazoles to their corresponding triazolinediones via in situ catalytic generation of Br+ using periodic acid or oxone®/KBr system. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2007.02.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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190
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Shervedani RK, Farahbakhsh A, Bagherzadeh M. Functionalization of gold cysteamine self-assembled monolayer with ethylenediaminetetraacetic acid as a novel nanosensor. Anal Chim Acta 2007; 587:254-62. [DOI: 10.1016/j.aca.2007.01.053] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2006] [Revised: 01/13/2007] [Accepted: 01/17/2007] [Indexed: 11/27/2022]
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191
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Bagherzadeh M, Latifi R, Tahsini L. Catalytic activity of manganese(III)-oxazoline complexes in urea hydrogen peroxide epoxidation of olefins: The effect of axial ligands. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.molcata.2006.07.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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192
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Zolfigol MA, Bagherzadeh M, Choghamarani AG, Keypour H, Salehzadeh S. N-NITROSATION OF SECONDARY AMINES UNDER MILD AND HETEROGENEOUS CONDITIONS. SYNTHETIC COMMUN 2006. [DOI: 10.1081/scc-100103999] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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193
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Zolfigol MA, Bagherzadeh M, Chehardoli G, Mallakpour SE. OXIDATION OF URAZOLES UNDER MILD AND HETEROGENEOUS CONDITIONS WITH KHSO5 AND NaNO2. SYNTHETIC COMMUN 2006. [DOI: 10.1081/scc-100103997] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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194
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Salehzadeh S, Nouri SM, Keypour H, Bagherzadeh M. Synthesis of gadolinium(III) and samarium(III) complexes of new potentially heptadentate (N4O3) tripodal Schiff base ligands, and a theoretical study. Polyhedron 2005. [DOI: 10.1016/j.poly.2005.03.099] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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195
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Shahrokhian S, Seifi H, Bagherzadeh M, Mousavi SR. Effects of Ion-Carrier Substituents on the Potentiometric-Response Characteristics in Anion-Selective Membrane Electrodes Based on Iron Porphyrins. Chemphyschem 2004; 5:652-60. [PMID: 15179717 DOI: 10.1002/cphc.200301025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The potentiometric response characteristics with respect to salicylate anion of several membrane electrodes based on iron(III) tetraphenylporphyrin chloride (FeTPPCl) and derivatives with electrophilic and nucleophilic substituents, incorporated into plasticized polyvinylchloride (PVC) membranes were investigated. Complexes tetraphenyl porphyrin iron(III) chloride (FeTPPCl; A), tetrakis (4-methoxyphenyl) porphyrin iron(III) chloride (Fe(TOCH3PP)Cl; B), tetrakis (2,6-dichlorophenyl) porphyrin iron(III) chloride (Fe(TDClPP)Cl; C), tetrakis (4-nitrophenyl) porphyrin iron(III) chloride (Fe(TNO2PP)Cl; D), and tetrakis (pentafluorophenyl) porphyrin iron(III) chloride (Fe(TPFPP)Cl; E) were used as anion carriers in the membrane electrodes. The sensitivity, working range, detection limit, response mechanism, and selectivity of the membrane sensor toward interference shows a considerable dependence on the type of carrier substituent and the pH value of the sample solution. Potentiometric investigations in solutions of various pH show that the carrier complex containing fluoro substituents (E), which have very strong electron-accepting properties and a high ability to form hydrogen bonds, is capable of serving as a positively charged ionophore. Some other ionophores are capable of serving as both charged and neutral carriers under different conditions. The electrodes prepared in this work show super-Nernstian slopes with respect to salicylate concentration, which tend to a Nernstian response (slope near to -59 mV decade-1) upon an increase of the pH of the test solution. The results of UV/Vis absorption spectroscopy are used for interpretation of the formation of an oxene complex between salicylate and iron porphyrins.
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Mohajer D, Karimipour G, Bagherzadeh M. Reactivity studies of biomimetic catalytic epoxidation of alkenes with tetrabutylammonium periodate in the presence of various manganese porphyrins and nitrogen donors: significant axial ligand π-bonding effects. NEW J CHEM 2004. [DOI: 10.1039/b310909g] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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197
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Bagherzadeh M. A new and highly effective method for catalytic oxidation of alcohols to the corresponding carbonyl compounds using the tris[(2-oxazolinyl)phenolato]manganese(III)/Oxone®/n-Bu4NBr oxidation system. Tetrahedron Lett 2003. [DOI: 10.1016/j.tetlet.2003.10.018] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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198
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Bagherzadeh M. Tris[(2-oxazolinyl)phenolato]manganese(III) as catalyst for mild and efficient oxidation of sulfides to sulfones with Oxone®. JOURNAL OF CHEMICAL RESEARCH 2003. [DOI: 10.3184/030823403322840305] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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199
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Shahrokhian S, Hamzehloei A, Bagherzadeh M. Chromium(III) porphyrin as a selective ionophore in a salicylate-selective membrane electrode. Anal Chem 2002; 74:3312-20. [PMID: 12139034 DOI: 10.1021/ac020099n] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The construction, potentiometric response properties, and applications of a novel ion-selective electrode with high selectivity toward salicylate are described. Chromium(III) tetraphenylporphyrin chloride was used as ion carrier into plasticized PVC membrane. This ionophore is capable of serving as both a positively charged and neutral carrier, depending on the pH of the sample solution. The influence of several variables was investigated to optimize the potentiometric response and selectivity of the electrode. The resulting electrode demonstrates a near-Nernstian response over a wide range of salicylate concentration (10(-6)-10(-1) M). This electrode has a fast response time and micromolar detection limit and could be used over a wide pH range (3-9). The proposed electrode showed very high selectivity for salicylate over a number of common inorganic and organic anions. The specific interaction of salicylate with the central metal of porphyrin is described based on UV-visible absorption spectra. The electrode was successfully applied to the determination of salicylate in pharmaceutical preparations and clinical samples.
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Mohajer D, Bagherzadeh M. Catalytic Oxidation of Saturated C—H Bonds by Tetrabutylammonium Periodate and Manganese Porphyrins. JOURNAL OF CHEMICAL RESEARCH 1998. [DOI: 10.1039/a800216i] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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