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Weidong J, Bin X, Jianzhang L, Qi L, Xiancheng Z, Hua C. Kinetic Studies on Hydrolysis of P-Nitrophenol Picolinate Mediated by Mono-Schiff Base Mn(III) Complexes as Synthetic Hydrolase. PROGRESS IN REACTION KINETICS AND MECHANISM 2019. [DOI: 10.3184/007967406779133984] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Three novel mono-Schiff base manganese(III) complexes (metal: ligand = 1 : 2) with benzoaza-15-crown-5 or morpholine pendant groups, were shown to promote the hydrolysis of p-nitrophenol picolinate (PNPP) under a series of experimental conditions. A mechanism for these catalysts is proposed in which the H2O molecule that hydrolyses the PNPP is deprotonated by the synergistic effect which results from central Mn(III) ion and oxygen atom located in the benzoaza-15-crown-5 or morpholine ring. The related kinetic model has been set up. The effects of structural differences of the listed complexes on the hydrolysis of PNPP have been discussed. The experimental results imply that the steric hindrance of side pendant groups is a primary factor for PNPP hydrolysis.
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Affiliation(s)
- Jiang Weidong
- Department of Chemistry, Key Laboratory of Green Chemistry & Technology, Sichuan University of Science & Engineering, Sichuan Zigong 643000, P. R China
- Key Laboratory of Green Chemistry & Technology(Sichuan University), Ministry of Education, Sichuan Chengdu 610064, P. R China; Organometal Homogeneous Catalytic Institute (Sichuan University), Sichuan Chengdu 610064, P. R China
| | - Xu Bin
- Department of Chemistry, Key Laboratory of Green Chemistry & Technology, Sichuan University of Science & Engineering, Sichuan Zigong 643000, P. R China
| | - Li Jianzhang
- Department of Chemistry, Key Laboratory of Green Chemistry & Technology, Sichuan University of Science & Engineering, Sichuan Zigong 643000, P. R China
| | - Lin Qi
- Key Laboratory of Green Chemistry & Technology(Sichuan University), Ministry of Education, Sichuan Chengdu 610064, P. R China; Organometal Homogeneous Catalytic Institute (Sichuan University), Sichuan Chengdu 610064, P. R China
| | - Zeng Xiancheng
- Key Laboratory of Green Chemistry & Technology(Sichuan University), Ministry of Education, Sichuan Chengdu 610064, P. R China; Organometal Homogeneous Catalytic Institute (Sichuan University), Sichuan Chengdu 610064, P. R China
| | - Chen Hua
- Key Laboratory of Green Chemistry & Technology(Sichuan University), Ministry of Education, Sichuan Chengdu 610064, P. R China; Organometal Homogeneous Catalytic Institute (Sichuan University), Sichuan Chengdu 610064, P. R China
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Gao J, Xing F, Bai Y, Zhu S. Synthesis, spectroscopy, and binding constants of ketocatechol-containing iminodiacetic acid and its Fe(iii), Cu(ii), and Zn(ii) complexes and reaction of Cu(ii) complex with H2O2 in aqueous solution. Dalton Trans 2014; 43:7964-78. [DOI: 10.1039/c4dt00118d] [Citation(s) in RCA: 14] [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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Liang J, Zhang J, Zhu L, Duarandin A, Young VG, Geacintov N, Canary JW. Structures, metal ion affinities, and fluorescence properties of soluble derivatives of tris((6-phenyl-2-pyridyl)methyl)amine. Inorg Chem 2010; 48:11196-208. [PMID: 19877674 DOI: 10.1021/ic901662z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Metal complexes of tris((6-phenyl-2-pyridyl)methyl)amine (2) have hydrophobic cavities that potentially accommodate small molecules. However, the utility of this attractive motif has been hampered by the poor solubility of such complexes in many common solvents. In this study, two tripodal ligands (3, tris-[6-(3,4,5-trimethoxy-phenyl)-pyridin-2-ylmethyl]-amine, and 4, tris((6-(3,4,5-tris(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)phenyl)pyridin-2-yl)methyl)amine) derived from 2 were prepared with enhanced solubility in organic and aqueous solvents. The X-ray crystallographic analyses of selected ligands and complexes revealed that the hydrophobic cavities inside the zinc complexes were retained after derivatization. Fluorescence, nuclear magnetic resonance (NMR), and potentiometric titration studies, which were enabled by the improved solubility, were performed to investigate the binding properties of the soluble ligands (3 and 4) with metal ions such as Zn(2+) and Cu(2+). When saturating quantities of Zn(2+) ions are added to ligand 3 in acetonitrile, the fluorescence emission maximum exhibits a pronounced red shift of approximately 80 nm (from 376 to 457 nm) and is enhanced by a factor of >100 when measured at 520 nm. The fluorescence properties of the Zn(2+) ion-coordinated ligands in the Zn(3) complex are consistent with a charge-transfer character in the excited state, with possible contributions from a planarization of the pyridyl-trimethoxyphenyl groups in the excited state, and from excitonic interactions.
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Affiliation(s)
- Jian Liang
- Department of Chemistry, New York University, New York, New York 10003, USA
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Blackman AG. Tripodal Tetraamine Ligands Containing Three Pyridine Units: The
other
Polypyridyl Ligands. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800115] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Allan G. Blackman
- Department of Chemistry, University of Otago, P. O. Box 56, Dunedin, New Zealand, Fax: +64‐3‐479‐7906
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Zhu L, dos Santos O, Koo CW, Rybstein M, Pape L, Canary JW. Geometry-dependent phosphodiester hydrolysis catalyzed by binuclear copper complexes. Inorg Chem 2004; 42:7912-20. [PMID: 14632508 DOI: 10.1021/ic0340985] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two isomeric binuclear ligands PBTPA and MBTPA and their copper(II) complexes were prepared and examined for hydrolysis of a model phosphodiester substrate: bis(p-nitrophenyl)phosphate. A bell-shaped pH vs rate profile, which is in agreement with one mechanism proposed for bimetallonucleases/phosphatases, was observed for the binuclear complex of copper(II) and PBTPA. At pH 8.4, a maximum rate of 1.14 x 10(-6) s(-1)--more than 10(4)-fold over uncatalyzed reactions--was achieved. However, the analogous complex of MBTPA did not show significant rate enhancement. The binuclear complex of copper(II) and PBTPA also showed 10-fold acceleration over mononuclear complex of copper(II) and tris(2-pyridylmethyl)amine (TPA) catalyzed reaction. A phage phiX174 DNA assay showed that the complex of copper(II) and PBTPA promoted supercoiled phage phiX174 DNA relaxation under both aerobic and anaerobic conditions, in contrast to the hydrolytic inactivity of the mononuclear complex of copper(II) and TPA.
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Affiliation(s)
- Lei Zhu
- Department of Chemistry, New York University, New York, New York 10003, USA
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7
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Dickins RS, Batsanov AS, Howard JAK, Parker D, Puschmann H, Salamano S. Structural and NMR investigations of the ternary adducts of twenty α-amino acids and selected dipeptides with a chiral, diaqua–ytterbium complex. Dalton Trans 2004:70-80. [PMID: 15356744 DOI: 10.1039/b311791j] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A detailed investigation of the nature of the binding of each of the 20 common alpha-amino acids and various selected dipeptides to a chiral, diaqua-ytterbium complex in aqueous solution has been carried out. Analysis of the dipolar 1H NMR paramagnetic shifts suggests that the alpha-amino acids form a common chelated structure within a nine-coordinate mono-capped square antiprismatic coordination environment, with the amine N axially disposed. Crystal structures of nine chelated YbL1-amino acid adducts (Gly, Ala, Ser, Thr, Met) confirm this. The ternary complexes with dipeptides (e.g. Gly-Ala, Gly-Ser, Gly-Met, Gly-Asp, Gly-Asn, Gly-His, Ser-Met, Asp-Phe, His-Gly) also favour the terminal amine as the axial donor with the proximate amide group binding to generate a five-ring chelate. Evidence for chelation through side-chain functionality was found only in the case of N-terminal Asp. The chiral environment about the ytterbium ion upon amino acid binding has also been probed using near-IR circular dichroism spectroscopy.
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Affiliation(s)
- Rachel S Dickins
- Department of Chemistry, University of Durham, South Road, Durham, UKDH1 3LE.
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Bourguignon J, Bremberg U, Dupas G, Hallman K, Hagberg L, Hortala L, Levacher V, Lutsenko S, Macedo E, Moberg C, Quéguiner G, Rahm F. Chiral ditopic receptors. Application to palladium-catalyzed allylic alkylation. Tetrahedron 2003. [DOI: 10.1016/j.tet.2003.10.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tsukube H, Shinoda S. Lanthanide complexes in molecular recognition and chirality sensing of biological substrates. Chem Rev 2002; 102:2389-403. [PMID: 12059273 DOI: 10.1021/cr010450p] [Citation(s) in RCA: 470] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hiroshi Tsukube
- Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
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TSUKUBE H, NISHIMURA T, SHINODA S. Recognition of biological substrates based on supramolecular interation and its application to chirality sensing with circular dichroism spectroscopy. BUNSEKI KAGAKU 2002. [DOI: 10.2116/bunsekikagaku.51.359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Hiroshi TSUKUBE
- Department of Chemistry, Graduate School of Science, Osaka City University
| | - Tomoko NISHIMURA
- Department of Chemistry, Graduate School of Science, Osaka City University
| | - Satoshi SHINODA
- Department of Chemistry, Graduate School of Science, Osaka City University
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Cacciapaglia R, Di Stefano S, Mandolini L. A dinuclear strontium(II) complex as substrate-selective catalyst of ester cleavage. J Org Chem 2001; 66:5926-8. [PMID: 11511275 DOI: 10.1021/jo015648o] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R Cacciapaglia
- Dipartimento di Chimica and Centro CNR Meccanismi di Reazione, Università La Sapienza, Box 34 - Roma 62, 00185 Roma, Italy.
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