101
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Jing-Lin W, Jiao F, Mei-Ping X, Bin-Sheng Y. Structure and spectral properties of dinuclear zinc complex containing semicarbazonate ligands. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:1245-1249. [PMID: 21288765 DOI: 10.1016/j.saa.2010.12.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2009] [Revised: 12/02/2010] [Accepted: 12/11/2010] [Indexed: 05/30/2023]
Abstract
The dinuclear Zn(2+) complex [Zn(HSSC)OAc](2)·2DMF (H(2)SSC=salicylaldehyde semicarbazone; HOAc=acetic acid; DMF=N,N-dimethylfomamide) was prepared and structurally characterized by single crystal X-ray. The basic structural unit of the complex is a dinuclear complex [Zn(HSSC)OAc](2) in which the semicarbazone ligand adopts the phenol-imine form. The deprotonated phenol group forms a one-atom bridge between the two zinc centers, and both of the zinc centers are five-coordinated. The local coordination environment of Zn(2+) can be approximately considered as square pyramidal. UV spectral studies show that the H(2)SSC provides strong binding of Zn(2+) in a 1:1 ratio in solution. The conditional binding constant of the complex is lgK(Zn-L)=12.89±0.76 in 0.05M Tris-HCl buffer at pH 7.4. The H(2)SSC exhibits an enhanced fluorescence effect by the addition of Zn(2+), and affords an excellent selectivity for Zn(2+) under physiological conditions.
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Affiliation(s)
- Wang Jing-Lin
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, China
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102
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Quintal SM, dePaula QA, Farrell NP. Zinc finger proteins as templates for metal ion exchange and ligand reactivity. Chemical and biological consequences. Metallomics 2011; 3:121-39. [PMID: 21253649 DOI: 10.1039/c0mt00070a] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Zinc finger reactions with inorganic ions and coordination compounds are as diverse as the zinc fingers themselves. Use of metal ions such as Co(2+) and Cd(2+) has given structural, thermodynamic and kinetic information on zinc fingers and zinc-finger-DNA/RNA interactions. It is a general truism that alteration of the coordination sphere in the finger environment will disrupt the recognition with DNA/RNA and this has implications for mechanism of toxicity and carcinogenesis of metal ions. Structural zinc fingers are susceptible to electrophilic attack and the recognition that the coordination sphere of inorganic compounds may be modulated for control of electrophilic attack on zinc fingers raises the possibility of systematic studies of zinc fingers as drug targets using inorganic chemistry. Some inorganic compounds such as those of As(III) and Au(I) may exert their biological effects through inactivation of zinc fingers and novel approaches to specifically attack the zinc-bound ligands using Co(III)-Schiff bases and Platinum(II)-Nucleobase compounds have been proposed. The genomic importance of zinc fingers suggests that the "coordination chemistry" of zinc fingers themselves is ripe for exploration to design new targets for medicinal inorganic chemistry.
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Affiliation(s)
- Susana M Quintal
- Department of Chemistry, Virginia Commonwealth University, 1001 W. Main St., Richmond, VA 23284-2006, USA
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103
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Jenter J, Lühl A, Roesky PW, Blechert S. Aminotroponiminate zinc complexes as catalysts for the intramolecular hydroamination. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.10.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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104
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A comparison of the coordination of two linkage isomers of bis(1-methylthioimidazolyl)methane to zinc salts. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2010.08.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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105
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Dutta S, Biswas P, Flörke U, Nag K. Structure, Stereochemistry, and Physico-Chemical Properties of Trinuclear and Dinuclear Metal(II) Complexes of a Phenol-Based Tetrapodal Schiff Base Ligand. Inorg Chem 2010; 49:7382-400. [DOI: 10.1021/ic100666t] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Supriya Dutta
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata −700032, India
| | - Papu Biswas
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata −700032, India
- Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah −711103, India
| | - Ulrich Flörke
- Department of Inorganic and Analytical Chemistry, Paderborn University, D-33098, Paderborn, Germany
| | - Kamalaksha Nag
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata −700032, India
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106
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Kloubert T, Görls H, Westerhausen M. Synthesis and Crystal Structures of Dinuclear Zinc Complexes with the 3,5-Bis(pyridine-2-yl)pyrazolato Ligand. Z Anorg Allg Chem 2010. [DOI: 10.1002/zaac.201000168] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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107
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Marinos N, Enthaler S, Driess M. High Efficiency in Catalytic Hydrosilylation of Ketones with Zinc-Based Precatalysts Featuring Hard and Soft Tridentate O,S,O-Ligands. ChemCatChem 2010. [DOI: 10.1002/cctc.201000036] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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108
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109
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Melnick JG, Yurkerwich K, Parkin G. On the chalcogenophilicity of mercury: evidence for a strong Hg-Se bond in [Tm(Bu(t))]HgSePh and its relevance to the toxicity of mercury. J Am Chem Soc 2010; 132:647-55. [PMID: 20020759 PMCID: PMC2810633 DOI: 10.1021/ja907523x] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
One of the reasons for the toxic effects of mercury has been attributed to its influence on the biochemical roles of selenium. For this reason, it is important to understand details pertaining to the nature of Hg-Se interactions and this has been achieved by comparison of a series of mercury chalcogenolate complexes that are supported by tris(2-mercapto-1-t-butyl-imidazolyl)hydroborato ligation, namely [Tm(Bu(t))]HgEPh (E = S, Se, Te). In particular, X-ray diffraction studies on [Tm(Bu(t))]HgEPh demonstrate that although the Hg-S bonds involving the [Tm(Bu(t))] ligand are longer than the corresponding Cd-S bonds of [Tm(Bu(t))]CdEPh, the Hg-EPh bonds are actually shorter than the corresponding Cd-EPh bonds, an observation which indicates that the apparent covalent radii of the metals in these compounds are dependent on the nature of the bonds. Furthermore, the difference in Hg-EPh and Cd-EPh bond lengths is a function of the chalcogen and increases in the sequence S (0.010 A) < Se (0.035 A) < Te (0.057 A). This trend indicates that the chalcogenophilicity of mercury increases in the sequence S < Se < Te. Thus, while mercury is often described as being thiophilic, it is evident that it actually has a greater selenophilicity, a notion that is supported by the observation of facile selenolate transfer from zinc to mercury upon treatment of [Tm(Bu(t))]HgSCH(2)C(O)N(H)Ph with [Tm(Bu(t))]ZnSePh. The significant selenophilicity of mercury is in accord with the aforementioned proposal that one reason for the toxicity of mercury is associated with it reducing the bioavailability of selenium.
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Affiliation(s)
| | - Kevin Yurkerwich
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Gerard Parkin
- Department of Chemistry, Columbia University, New York, New York 10027, USA
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110
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Li L, Dang YQ, Li HW, Wang B, Wu Y. Fluorescent chemosensor based on Schiff base for selective detection of zinc(II) in aqueous solution. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2009.11.070] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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111
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Wrackmeyer B, Shahid K, Kempe R, Döring C, Milius W. Indazaboles-synthesis and molecular structure. Appl Organomet Chem 2010. [DOI: 10.1002/aoc.1627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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112
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Liguori PF, Valentini A, Palma M, Bellusci A, Bernardini S, Ghedini M, Panno ML, Pettinari C, Marchetti F, Crispini A, Pucci D. Non-classical anticancer agents: synthesis and biological evaluation of zinc(ii) heteroleptic complexes. Dalton Trans 2010; 39:4205-12. [DOI: 10.1039/b922101h] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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113
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Kumar U, Thomas J, Thirupathi N. Factors Dictating the Nuclearity/Aggregation and Acetate Coordination Modes of Lutidine-Coordinated Zinc(II) Acetate Complexes. Inorg Chem 2009; 49:62-72. [DOI: 10.1021/ic901100z] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Umesh Kumar
- Department of Chemistry, University of Delhi, Delhi − 110 007, India
| | - Jency Thomas
- Department of Chemistry, Indian Institute of Technology Delhi, Delhi − 110 016, India
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114
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Alzoubi B, Puchta R, van Eldik R. Ligand Exchange Processes on Solvated Zinc Cations - DFT Analysis of Hydrogen Cyanide Exchange on [Zn(HCN)6]2+. Z Anorg Allg Chem 2009. [DOI: 10.1002/zaac.200900160] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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115
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Milione S, Capacchione C, Cuomo C, Strianese M, Bertolasi V, Grassi A. New Zinc Complexes bearing κ2-Heteroscorpionate Ligands: Influence of Second-Sphere Bonding Interactions on Reactivity and Properties. Inorg Chem 2009; 48:9510-8. [DOI: 10.1021/ic901091e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stefano Milione
- Dipartimento di Chimica, Università di Salerno, via Ponte don Melillo, I-84084 Fisciano (SA), Italy, and
| | - Carmine Capacchione
- Dipartimento di Chimica, Università di Salerno, via Ponte don Melillo, I-84084 Fisciano (SA), Italy, and
| | - Cinzia Cuomo
- Dipartimento di Chimica, Università di Salerno, via Ponte don Melillo, I-84084 Fisciano (SA), Italy, and
| | - Maria Strianese
- Dipartimento di Chimica, Università di Salerno, via Ponte don Melillo, I-84084 Fisciano (SA), Italy, and
| | - Valerio Bertolasi
- Dipartimento di Chimica, Università di Salerno, via Ponte don Melillo, I-84084 Fisciano (SA), Italy, and
| | - Alfonso Grassi
- Dipartimento di Chimica, Università di Salerno, via Ponte don Melillo, I-84084 Fisciano (SA), Italy, and
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116
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Banerjee A, Ganguly S, Chattopadhyay T, Sabnam Banu K, Patra A, Bhattacharya S, Zangrando E, Das D. Metal-Assisted Oxazolidine/Oxazine Ring Formation in Dinuclear Zinc(II) Complexes: Synthesis, Structural Aspects, and Bioactivity. Inorg Chem 2009; 48:8695-702. [DOI: 10.1021/ic900643h] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arpita Banerjee
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India
| | - Subhalakshmi Ganguly
- Chittaranjan National Cancer Institute, 37 S. P. Mukherjee Road, Kolkata 700026, India
| | - Tanmay Chattopadhyay
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India
| | - Kazi Sabnam Banu
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India
| | - Amarendra Patra
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India
| | - Santanu Bhattacharya
- Department of Chemistry, Maharaja Manindra Chandra College, Kolkata 700003, India
| | - Ennio Zangrando
- Dipartimento di Scienze Chimiche, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Debasis Das
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata 700009, India
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117
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Zinc finger proteins as templates for metal ion exchange: Substitution effects on the C-finger of HIV nucleocapsid NCp7 using M(chelate) species (M=Pt, Pd, Au). J Inorg Biochem 2009; 103:1347-54. [PMID: 19692125 DOI: 10.1016/j.jinorgbio.2009.07.002] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2009] [Revised: 06/30/2009] [Accepted: 07/03/2009] [Indexed: 11/23/2022]
Abstract
The interactions of monofunctional [MCl(chelate)] compounds (M=Pt(II), Pd(II) or Au(III) and chelate=diethylenetriamine, dien or 2,2',2''-terpyridine, terpy) with the C-terminal finger of the HIV nucleocapsid NCp7 zinc finger (ZF) were studied by mass spectrometry and circular dichroism spectroscopy. In the case of [M(dien)] species, Pt(II) and Pd(II) behaved in a similar fashion with evidence of adducts caused by displacement of Pt-Cl or Pd-Cl by zinc-bound thiolate. Labilization, presumably under the influence of the strong trans influence of thiolate, resulted in loss of ligand (dien) as well as zinc ejection and formation of species with only Pd(II) or Pt(II) bound to the finger. For both Au(III) compounds the reactions were very fast and only "gold fingers" with no ancillary ligands were observed. For all terpyridine compounds ligand scrambling and metal exchange occurred with formation of [Zn(terpy)](2+). The results conform well to those proposed from the study of model Zn compounds such as N,N'-bis(2-mercapto-ethyl)-1,4-diazacycloheptanezinc(II), [Zn(bme-dach)](2). The possible structures of the adducts formed are discussed and, for Pt(II) and Pd(II), the evidence for possible expansion of the zinc coordination sphere from four- to five-coordinate is discussed. This observation reinforces the possibility of change in geometry for zinc in biology, even in common "structural" sites in metalloenzymes. The results further show that the extent and rate of zinc displacement by inorganic compounds can be modulated by the nature (metal, ligands) of the reacting compound.
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118
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Penkova LV, Macia̧g A, Rybak-Akimova EV, Haukka M, Pavlenko VA, Iskenderov TS, Kozłowski H, Meyer F, Fritsky IO. Efficient Catalytic Phosphate Ester Cleavage by Binuclear Zinc(II) Pyrazolate Complexes as Functional Models of Metallophosphatases. Inorg Chem 2009; 48:6960-71. [PMID: 19548638 DOI: 10.1021/ic900520j] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Larysa V. Penkova
- Department of Inorganic Chemistry, National Taras Shevchenko University, Volodymyrska str. 64, Kyiv 01033, Ukraine
| | - Anna Macia̧g
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Elena V. Rybak-Akimova
- Department of Chemistry, Pearson Chemistry Laboratory, Tufts University, Medford, Massachusetts 02155
| | - Matti Haukka
- Department of Chemistry, University of Joensuu, P.O. Box 111, 80101, Joensuu, Finland
| | - Vadim A. Pavlenko
- Department of Inorganic Chemistry, National Taras Shevchenko University, Volodymyrska str. 64, Kyiv 01033, Ukraine
| | - Turganbay S. Iskenderov
- Karakalpakian University, Department of Chemistry, Universitet Keshesi 1, 742012 Nukus, Uzbekistan
| | - Henryk Kozłowski
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Franc Meyer
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstr. 4, 37077 Göttingen, Germany
| | - Igor O. Fritsky
- Department of Inorganic Chemistry, National Taras Shevchenko University, Volodymyrska str. 64, Kyiv 01033, Ukraine
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119
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120
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Affiliation(s)
- Mark D. Spicer
- WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK, Fax: +44‐141‐548‐4822
| | - John Reglinski
- WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK, Fax: +44‐141‐548‐4822
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121
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Xie J. Twodimensional Metal-Organic Framework [Zn(bqdc)]n(bqdc = 2,2′-biquinoline-4,4′-dicarboxylate) - Synthesis, Crystal Structure and Spectral Characterization. Z Anorg Allg Chem 2009. [DOI: 10.1002/zaac.200800406] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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122
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Almaraz E, Denny JA, Foley WS, Reibenspies JH, Bhuvanesh N, Darensbourg MY. Zinc/Nickel exchange and ligand cannibalism in N2S2O1,2 donor ligand sets. Dalton Trans 2009:9496-502. [DOI: 10.1039/b914422f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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123
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Knight PD, White AJP, Williams CK. Dinuclear Zinc Complexes Using Pentadentate Phenolate Ligands. Inorg Chem 2008; 47:11711-9. [DOI: 10.1021/ic8014173] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul D. Knight
- Department of Chemistry, Imperial College London, London, SW7 2AZ, U.K
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124
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Xie J. Toward a facile one-step construction of quantum dots containing Zn8S cores. Inorg Chem 2008; 47:5564-6. [PMID: 18540592 DOI: 10.1021/ic800721r] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three neutral nanoclusters Zn 8S(SC 6H 5) 14L 2 [L = 3-aminopyridine ( 1), 4-(dimethylamino)pyridine ( 2), 4-methylpyridine ( 3)] featuring a wurtzite-like core have been assembled by a controlled one-step hydrothermal reaction. Their detailed photoluminescence properties depend upon the ligand substituents. Cluster 1 exhibited a narrow, symmetric emission spectrum and has a potential application as a fluorescence quantum dot.
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Affiliation(s)
- Jingli Xie
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia.
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125
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Almaraz E, de Paula QA, Liu Q, Reibenspies JH, Darensbourg MY, Farrell NP. Thiolate Bridging and Metal Exchange in Adducts of a Zinc Finger Model and PtII Complexes: Biomimetic Studies of Protein/Pt/DNA Interactions. J Am Chem Soc 2008; 130:6272-80. [DOI: 10.1021/ja711254q] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elky Almaraz
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, and Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia, 23284-2006
| | - Queite A. de Paula
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, and Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia, 23284-2006
| | - Qin Liu
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, and Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia, 23284-2006
| | - Joseph H. Reibenspies
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, and Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia, 23284-2006
| | - Marcetta Y. Darensbourg
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, and Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia, 23284-2006
| | - Nicholas P. Farrell
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, and Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia, 23284-2006
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126
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Xue L, Wang HH, Wang XJ, Jiang H. Modulating affinities of di-2-picolylamine (DPA)-substituted quinoline sensors for zinc ions by varying pendant ligands. Inorg Chem 2008; 47:4310-8. [PMID: 18410092 DOI: 10.1021/ic702393z] [Citation(s) in RCA: 111] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have developed a series of di-2-picolylamine (DPA)-substituted quinoline sensors, HQ1- 4, bearing a pendant ligand at the 8 position of quinoline. UV-vis spectra of HQ1- 4 showed similar variations to that of HQ5 but with different varying extents upon the titration of zinc ions. Fluorescence intensities of HQ1, HQ3, and HQ4 were enhanced 4-6 times upon the addition of 1 equiv of zinc ions under an aqueous buffer. Somewhat unexpectedly, HQ2 is nonfluorescent in the presence of metal ions, including zinc ions. The affinities of HQ sensors are distributed in a broad range from nanomolarity to femtomolarity by varying the pendant ligands near the coordination unit. More importantly, these new sensors exhibited very high selectivity for Zn(2+) over Na(+), K(+), Mg(2+), and Ca(2+) at the millimolar level and over other transition metal ions at the micromolar level, except for Cd(2+). These findings indicated that the incorporations of the pendant groups exerted no effect on the spectroscopic properties and selectivity of the parent fluorescent sensor, with the exception of HQ2. Finally, X-ray crystal structures of ZnHQ's revealed that the auxiliary pendant groups at the 8 position participated in zinc coordination and were able to tune the affinities of HQ sensors.
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Affiliation(s)
- Lin Xue
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China
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127
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Clegg W, Dale SH, Hevia E, Hogg LM, Honeyman GW, Mulvey RE, O'Hara CT, Russo L. Structurally defined reactions of sodium TMP-zincate with nitrile compounds: synthesis of a salt-like sodium sodiumdizincate and other unexpected ion-pair products. Angew Chem Int Ed Engl 2008; 47:731-4. [PMID: 18067112 DOI: 10.1002/anie.200704341] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- William Clegg
- School of Natural Sciences (Chemistry), Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
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128
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Clegg W, Dale S, Hevia E, Hogg L, Honeyman G, Mulvey R, O'Hara C, Russo L. Structurally Defined Reactions of Sodium TMP–Zincate with Nitrile Compounds: Synthesis of a Salt-Like Sodium Sodiumdizincate and Other Unexpected Ion-Pair Products. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200704341] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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129
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130
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Picot D, Ohanessian G, Frison G. Thermodynamic Stability Versus Kinetic Lability of ZnS4Core. Chem Asian J 2008; 5:1445-54. [DOI: 10.1002/asia.200900624] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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131
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132
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Grotjahn DB. Bifunctional catalysts and related complexes: structures and properties. Dalton Trans 2008:6497-508. [DOI: 10.1039/b809274e] [Citation(s) in RCA: 86] [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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133
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Parkin G. Applications of Tripodal [S(3)] and [Se(3)] L(2)X Donor Ligands to Zinc, Cadmium and Mercury Chemistry: Organometallic and Bioinorganic Perspectives. NEW J CHEM 2007; 31:1996-2014. [PMID: 19484137 PMCID: PMC2688380 DOI: 10.1039/b712012e] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The tripodal tris(2-mercapto-1-R-imidazolyl)hydroborato ligand system, [Tm(R)], and its selenium counterpart, [Tse(R)], provide useful platforms for investigating organometallic and bioinorganic aspects of the chemistry of zinc, cadmium and mercury in sulfur-rich and selenium-rich coordination environments. For example, the tridentate [Tm(R)] ligand provides an [S(3)] donor array that is of use for mimicking aspects of zinc enzymes and proteins that have sulfur-rich active sites, such as the Ada DNA repair protein. With respect to mercury, an interesting application of the [Tm(Bu(t) )] ligand is the synthesis of the mercury alkyl compounds [Tm(Bu(t) )]HgR (R = Me, Et) that react with PhSH to yield [Tm(Bu(t) )]HgSPh and RH, a reaction that emulates mercury detoxification by the organomercurial lyase, MerB. In addition to the tridentate [Tm(R)] and [Tse(R)] ligands, applications of the bidentate counterparts, [Bm(R)] and [Bse(R)] are also described.
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Affiliation(s)
- Gerard Parkin
- Department of Chemistry, Columbia University, New York, New York 10027, USA
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