1
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Hammond M, Vaccaro DA, Parkin G. Synthesis and structural characterization of thallium and cadmium carbatrane compounds, [ TismPriBenz]Tl and [ TismPriBenz]CdMe. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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2
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Sahli S, Lefebvre F, Jelsch C, Ben Nasr C, Kaabi K. Synthesis, Crystal Structure, Hirshfeld Surface Analysis and DFT Calculations of Two New Cu(II) and Cd(II) Complexes with the 4-Amino-6-methoxypyrimidine Ligand. RUSS J COORD CHEM+ 2022. [DOI: 10.1134/s1070328422080061] [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]
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3
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New lead(II) coordination polymer derived from second generation O-methylpyridylxanthate: Crystallographic and computational studies. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120032] [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]
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4
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Yadav R, Singh S, Trivedi M, Kociok-Köhn G, Rath NP, Köhn RD, Muddassir M, Kumar A. New main-group ferrocenyldithiocarbamates and conversion to ferrocene oxazolidine-2-thione and -2-one. NEW J CHEM 2020. [DOI: 10.1039/c9nj06139h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Three new main-group ferrocenyl dithiocarbamates and a pure cyclised product, 3-ferrocenylmethyl-oxazolidine-2-thione, were isolated using copper powder.
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Affiliation(s)
- Reena Yadav
- Department of Chemistry
- University of Lucknow
- Lucknow 226 007
- India
| | - Suryabhan Singh
- Department of Chemistry
- Guru GhasidasVishwadiyalaya
- Bilaspur
- India
| | - Manoj Trivedi
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Gabriele Kociok-Köhn
- Material and Chemical Characterisation Facility (MC2)
- University of Bath
- Bath BA2 7AY
- UK
| | - Nigam P. Rath
- Department of Chemistry & Biochemistry and Centre for Nanoscience
- University of Missouri-St. Louis
- One University Boulevard
- St. Louis
- USA
| | | | - Mohd. Muddassir
- Department of Chemistry
- College of Sciences
- King Saud University
- Riyadh 11451
- Saudi Arabia
| | - Abhinav Kumar
- Department of Chemistry
- University of Lucknow
- Lucknow 226 007
- India
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5
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Burt LK, Hill AF. Heterobimetallic μ2-carbido complexes of platinum and tungsten. Dalton Trans 2020; 49:8143-8161. [DOI: 10.1039/d0dt01617a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The tungsten–platinum μ-carbido complex [WPt(μ-C)Br(CO)2(PPh3)2(Tp*)] (Tp* = hydrotris(dimethylpyrazol-1-yl)borate) undergoes facile substitution of both bromide and phosphine ligands to afford a diverse library of μ-carbido complexes.
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Affiliation(s)
- Liam K. Burt
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
| | - Anthony F. Hill
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
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6
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Tolbatov I, Re N, Coletti C, Marrone A. Determinants of the Lead(II) Affinity in pbrR Protein: A Computational Study. Inorg Chem 2019; 59:790-800. [DOI: 10.1021/acs.inorgchem.9b03059] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Iogann Tolbatov
- Dipartimento di Farmacia, Università“G d’Annunzio” di Chieti-Pescara, Via dei Vestini 31, Chieti, Italy
| | - Nazzareno Re
- Dipartimento di Farmacia, Università“G d’Annunzio” di Chieti-Pescara, Via dei Vestini 31, Chieti, Italy
| | - Cecilia Coletti
- Dipartimento di Farmacia, Università“G d’Annunzio” di Chieti-Pescara, Via dei Vestini 31, Chieti, Italy
| | - Alessandro Marrone
- Dipartimento di Farmacia, Università“G d’Annunzio” di Chieti-Pescara, Via dei Vestini 31, Chieti, Italy
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7
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Azam M, Al-Resayes SI, Wabaidur SM, Trzesowska-Kruszynska A, Kruszynski R, Mohapatra RK, Siddiqui MRH. Cd(II) complex constructed from dipyridyl imine ligand: Design, synthesis and exploration of its photocatalytic degradation properties. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.12.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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8
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Carpenter MC, Shami Shah A, DeSilva S, Gleaton A, Su A, Goundie B, Croteau ML, Stevenson MJ, Wilcox DE, Austin RN. Thermodynamics of Pb(ii) and Zn(ii) binding to MT-3, a neurologically important metallothionein. Metallomics 2017; 8:605-17. [PMID: 26757944 DOI: 10.1039/c5mt00209e] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Isothermal titration calorimetry (ITC) was used to quantify the thermodynamics of Pb(2+) and Zn(2+) binding to metallothionein-3 (MT-3). Pb(2+) binds to zinc-replete Zn7MT-3 displacing each zinc ion with a similar change in free energy (ΔG) and enthalpy (ΔH). EDTA chelation measurements of Zn7MT-3 and Pb7MT-3 reveal that both metal ions are extracted in a tri-phasic process, indicating that they bind to the protein in three populations with different binding thermodynamics. Metal binding is entropically favoured, with an enthalpic penalty that reflects the enthalpic cost of cysteine deprotonation accompanying thiolate ligation of the metal ions. These data indicate that Pb(2+) binding to both apo MT-3 and Zn7MT-3 is thermodynamically favourable, and implicate MT-3 in neuronal lead biochemistry.
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Affiliation(s)
- M C Carpenter
- Department of Chemistry, Dartmouth College, Hanover, NH 03755, USA.
| | - A Shami Shah
- Department of Chemistry, Bates College, Lewiston, ME 04240, USA
| | - S DeSilva
- Department of Chemistry, Bates College, Lewiston, ME 04240, USA
| | - A Gleaton
- Department of Chemistry, Bates College, Lewiston, ME 04240, USA
| | - A Su
- Department of Chemistry, Bates College, Lewiston, ME 04240, USA
| | - B Goundie
- Department of Chemistry, Bates College, Lewiston, ME 04240, USA
| | - M L Croteau
- Department of Chemistry, Dartmouth College, Hanover, NH 03755, USA.
| | - M J Stevenson
- Department of Chemistry, Dartmouth College, Hanover, NH 03755, USA.
| | - D E Wilcox
- Department of Chemistry, Dartmouth College, Hanover, NH 03755, USA.
| | - R N Austin
- Department of Chemistry, Bates College, Lewiston, ME 04240, USA and Department of Chemistry, Barnard College, Columbia University, NY, NY 10027, USA.
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9
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The facile preparation and structural characterization of two new isostructural 2D coordination polymers, {[M 2 (bbit) 3 Cl 2 ][MCl 4 ]} n [where M = Zn and Cd; bbit = 1,1-bis (3-methyl-4-imidazoline-2-thione) butane]. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.07.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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10
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Bousleiman J, Pinsky A, Ki S, Su A, Morozova I, Kalachikov S, Wiqas A, Silver R, Sever M, Austin RN. Function of Metallothionein-3 in Neuronal Cells: Do Metal Ions Alter Expression Levels of MT3? Int J Mol Sci 2017; 18:ijms18061133. [PMID: 28587098 PMCID: PMC5485957 DOI: 10.3390/ijms18061133] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 05/16/2017] [Accepted: 05/16/2017] [Indexed: 11/25/2022] Open
Abstract
A study of factors proposed to affect metallothionein-3 (MT3) function was carried out to elucidate the opaque role MT3 plays in human metalloneurochemistry. Gene expression of Mt2 and Mt3 was examined in tissues extracted from the dentate gyrus of mouse brains and in human neuronal cell cultures. The whole-genome gene expression analysis identified significant variations in the mRNA levels of genes associated with zinc homeostasis, including Mt2 and Mt3. Mt3 was found to be the most differentially expressed gene in the identified groups, pointing to the existence of a factor, not yet identified, that differentially controls Mt3 expression. To examine the expression of the human metallothioneins in neurons, mRNA levels of MT3 and MT2 were compared in BE(2)C and SH-SY5Y cell cultures treated with lead, zinc, cobalt, and lithium. MT2 was highly upregulated by Zn2+ in both cell cultures, while MT3 was not affected, and no other metal had an effect on either MT2 or MT3.
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Affiliation(s)
- Jamie Bousleiman
- Department of Chemistry, Barnard College of Columbia University, New York, NY 10027, USA.
| | - Alexa Pinsky
- Department of Chemistry, Barnard College of Columbia University, New York, NY 10027, USA.
| | - Sohee Ki
- Department of Chemistry, Barnard College of Columbia University, New York, NY 10027, USA.
| | - Angela Su
- Department of Chemistry, Barnard College of Columbia University, New York, NY 10027, USA.
| | - Irina Morozova
- Center for Genome Technology and Biomolecular Engineering, Department of Chemical Engineering, Columbia University, New York, NY 10027, USA.
| | - Sergey Kalachikov
- Center for Genome Technology and Biomolecular Engineering, Department of Chemical Engineering, Columbia University, New York, NY 10027, USA.
| | - Amen Wiqas
- Department of Biology, Barnard College of Columbia University, New York, NY 10027, USA.
| | - Rae Silver
- Department of Psychology and Program in Neuroscience, Barnard College of Columbia University, New York, NY 10027, USA.
- Department of Psychology, Columbia University, New York, NY 10027, USA.
- Department of Pathology and Cell Biology Columbia Health Sciences, New York, NY 10027, USA.
| | - Mary Sever
- Department of Chemistry, Barnard College of Columbia University, New York, NY 10027, USA.
| | - Rachel Narehood Austin
- Department of Chemistry, Barnard College of Columbia University, New York, NY 10027, USA.
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11
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Kreider-Mueller A, Quinlivan PJ, Owen JS, Parkin G. Tris(2-mercaptoimidazolyl)hydroborato Cadmium Thiolate Complexes, [Tm But]CdSAr: Thiolate Exchange at Cadmium in a Sulfur-Rich Coordination Environment. Inorg Chem 2017; 56:4644-4654. [PMID: 28368611 PMCID: PMC5461919 DOI: 10.1021/acs.inorgchem.7b00296] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Indexed: 11/30/2022]
Abstract
A series of cadmium thiolate compounds that feature a sulfur-rich coordination environment, namely [TmBut]CdSAr, have been synthesized by the reactions of [TmBut]CdMe with ArSH (Ar = C6H4-4-F, C6H4-4-But, C6H4-4-OMe, and C6H4-3-OMe). In addition, the pyridine-2-thiolate and pyridine-2-selenolate derivatives, [TmBut]CdSPy and [TmBut]CdSePy have been obtained via the respective reactions of [TmBut]CdMe with pyridine-2-thione and pyridine-2-selone. The molecular structures of [TmBut]CdSAr and [TmBut]CdEPy (E = S or Se) have been determined by X-ray diffraction and demonstrate that, in each case, the [CdS4] motif is distorted tetrahedral and approaches a trigonal monopyramidal geometry in which the thiolate ligand adopts an equatorial position; [TmBut]CdSPy and [TmBut]CdSePy, however, exhibit an additional long-range interaction with the pyridyl nitrogen atoms. The ability of the thiolate ligands to participate in exchange was probed by 1H and 19F nuclear magnetic resonance (NMR) spectroscopic studies of the reactions of [TmBut]CdSC6H4-4-F with ArSH (Ar = C6H4-4-But or C6H4-4-OMe), which demonstrate that (i) exchange is facile and (ii) coordination of thiolate to cadmium is most favored for the p-fluorophenyl derivative. Furthermore, a two-dimensional EXSY experiment involving [TmBut]CdSC6H4-4-F and 4-fluorothiophenol demonstrates that degenerate thiolate ligand exchange is also facile on the NMR time scale.
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Affiliation(s)
- Ava Kreider-Mueller
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Patrick J. Quinlivan
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Jonathan S. Owen
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Gerard Parkin
- Department of Chemistry, Columbia University, New York, New York 10027, United States
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12
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Perez C, Li J, Parlati F, Rouffet M, Ma Y, Zhou HJ, Mackinnon AL, Chou TF, Deshaies RJ, Cohen SM. Discovery of an Inhibitor of the Proteasome Subunit Rpn11. J Med Chem 2017; 60:1343-1361. [PMID: 28191850 PMCID: PMC5761724 DOI: 10.1021/acs.jmedchem.6b01379] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The proteasome plays a crucial role in degradation of normal proteins that happen to be constitutively or inducibly unstable, and in this capacity it plays a regulatory role. Additionally, it degrades abnormal/damaged/mutant/misfolded proteins, which serves a quality-control function. Inhibitors of the proteasome have been validated in the treatment of multiple myeloma, with several FDA-approved therapeutics. Rpn11 is a Zn2+-dependent metalloisopeptidase that hydrolyzes ubiquitin from tagged proteins that are trafficked to the proteasome for degradation. A fragment-based drug discovery (FBDD) approach was utilized to identify fragments with activity against Rpn11. Screening of a library of metal-binding pharmacophores (MBPs) revealed that 8-thioquinoline (8TQ, IC50 value ∼2.5 μM) displayed strong inhibition of Rpn11. Further synthetic elaboration of 8TQ yielded a small molecule compound (35, IC50 value ∼400 nM) that is a potent and selective inhibitor of Rpn11 that blocks proliferation of tumor cells in culture.
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Affiliation(s)
- Christian Perez
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla CA 92093
| | - Jing Li
- Division of Biology and Biological Engineering, Box 114-96, Pasadena CA 91107
| | - Frank Parlati
- Division of Biology and Biological Engineering, Box 114-96, Pasadena CA 91107
| | - Matthieu Rouffet
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla CA 92093
| | - Yuyong Ma
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla CA 92093
| | - Han-Jie Zhou
- Howard Hughes Medical Institute, California Institute of Technology, Cleave BioSciences, Inc. 866 Malcom Rd. #100 Burlingame, CA 94010
| | - Andrew L. Mackinnon
- Division of Biology and Biological Engineering, Box 114-96, Pasadena CA 91107
| | - Tsui-Fen Chou
- Division of Biology and Biological Engineering, Box 114-96, Pasadena CA 91107
| | - Raymond J. Deshaies
- Division of Biology and Biological Engineering, Box 114-96, Pasadena CA 91107
| | - Seth M. Cohen
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla CA 92093
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13
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Huang S, Liu X, Wang D, Chen W, Hu Q, Wei T, Zhou W, Gan J, Chen H. Structural Basis for the Selective Pb(II) Recognition of Metalloregulatory Protein PbrR691. Inorg Chem 2016; 55:12516-12519. [DOI: 10.1021/acs.inorgchem.6b02397] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Jianhua Gan
- School of Life Sciences, Fudan University, Shanghai 200433, P. R. China
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14
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Roy S, Bauzá A, Frontera A, Chattopadhyay S. A combined experimental and computational study of supramolecular assemblies in two photoluminescent cadmium(II) complexes with halosalicylaldimine Schiff bases. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.05.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Marckwordt A, Rajasekharan‐Nair R, Steel G, Kennedy AR, Reglinski J, Spicer MD. The First Structurally Characterised Example of Silicon in an S6 Coordination Sphere. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501269] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Annemarie Marckwordt
- Department of Pure & Applied Chemistry University of Strathclyde 295 Cathedral Street G1 1XL Glasgow UK
| | - Rajeev Rajasekharan‐Nair
- Department of Pure & Applied Chemistry University of Strathclyde 295 Cathedral Street G1 1XL Glasgow UK
| | - Graham Steel
- Department of Pure & Applied Chemistry University of Strathclyde 295 Cathedral Street G1 1XL Glasgow UK
| | - Alan R. Kennedy
- Department of Pure & Applied Chemistry University of Strathclyde 295 Cathedral Street G1 1XL Glasgow UK
| | - John Reglinski
- Department of Pure & Applied Chemistry University of Strathclyde 295 Cathedral Street G1 1XL Glasgow UK
| | - Mark D. Spicer
- Department of Pure & Applied Chemistry University of Strathclyde 295 Cathedral Street G1 1XL Glasgow UK
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16
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Structural transformations and solid-state reactivity involving nano lead(II) coordination polymers via thermal, mechanochemical and photochemical approaches. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.10.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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17
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Kreider-Mueller A, Quinlivan PJ, Rauch M, Owen JS, Parkin G. Synthesis, structure and reactivity of [TmBut]ZnH, a monomeric terminal zinc hydride compound in a sulfur-rich coordination environment: access to a heterobimetallic compound. Chem Commun (Camb) 2016; 52:2358-61. [DOI: 10.1039/c5cc08915h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The zinc hydride complex, [TmBut]ZnH, undergoes insertion of CO2 and facile protolytic cleavage, of which the latter provides access to heterobimetallic [TmBut]ZnMo(CO)3Cp.
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Affiliation(s)
| | | | - Michael Rauch
- Department of Chemistry
- Columbia University
- New York
- USA
| | | | - Gerard Parkin
- Department of Chemistry
- Columbia University
- New York
- USA
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18
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Wang J, Chen X, Wu K, Zhang M, Huang W. Highly-sensitive Electrochemical Sensor for Cd2+and Pb2+Based on the Synergistic Enhancement of Exfoliated Graphene Nanosheets and Bismuth. ELECTROANAL 2015. [DOI: 10.1002/elan.201500447] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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19
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20
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Imran M, Mix A, Neumann B, Stammler HG, Monkowius U, Gründlinger P, Mitzel NW. Hemi- and holo-directed lead(II) complexes in a soft ligand environment. Dalton Trans 2015; 44:924-37. [PMID: 25104214 DOI: 10.1039/c4dt01406e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
To investigate the geometry and stereochemical activity of the lone pair at the lead atom, lead(ii) complexes () with one tripodal (L(1)), one dipodal (L(2)) boron-centred soft ligand and eight other small soft heterocyclic ligands, 2-mercaptobenzimidazole (L(3)), 2-mercapto-5-methylbenzimidazole (L(4)), 3-mercapto-1,2,4-triazole (L(5)H), 3-mercapto-4-methyl-1,2,4-triazole (L(6)), 2-mercapto-1,3,4-thiadiazole (L(7)H), 2-mercapto-5-methyl-1,3,4-thiadiazole (L(8)H), 5-mercapto-1-methyltetrazole (L(9)H) and 2-mercapto-4-phenylthiazole (L(10)H) were prepared. The structures of these complexes were elucidated on the basis of X-ray crystallography, elemental analyses as well as (1)H NMR, (1)H DOSY, (13)C NMR and (207)Pb NMR spectroscopy. The coordination numbers of these complexes vary from 4 to 8. The majority of the complexes are polymeric and possess a hemi-directed environment around the lead atoms. Solution studies revealed that most of the complexes are dissociated in highly polar solvents. Most of the complexes are emissive both under ambient conditions and at 77 K in the solid state. However, no obvious relationship between their solid state structures and luminescence behaviour with respect to the nature of the excited state could be identified.
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Affiliation(s)
- Muhammad Imran
- Universität Bielefeld, Lehrstuhl für Anorganische Chemie und Strukturchemie, Centrum für Molekulare Materialien CM2, Universitätsstraße 25, 33615 Bielefeld, Germany.
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Nugent JW, Lee HS, Reibenspies JH, Hancock RD. Spectroscopic, structural, and thermodynamic aspects of the stereochemically active lone pair on lead(II): Structure of the lead(II) dota complex. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.02.033] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Kreider-Mueller A, Quinlivan PJ, Owen JS, Parkin G. Synthesis and structures of cadmium carboxylate and thiocarboxylate compounds with a sulfur-rich coordination environment: carboxylate exchange kinetics involving tris(2-mercapto-1-t-butylimidazolyl)hydroborato cadmium complexes, [Tm(Bu(t))]Cd(O2CR). Inorg Chem 2015; 54:3835-50. [PMID: 25826184 PMCID: PMC4415050 DOI: 10.1021/acs.inorgchem.5b00017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Indexed: 11/28/2022]
Abstract
A series of cadmium carboxylate compounds in a sulfur-rich environment provided by the tris(2-tert-butylmercaptoimidazolyl)hydroborato ligand, namely, [Tm(Bu(t))]CdO2CR, has been synthesized via the reactions of the cadmium methyl derivative [Tm(Bu(t))]CdMe with RCO2H. Such compounds mimic aspects of cadmium-substituted zinc enzymes and also the surface atoms of cadmium chalcogenide crystals, and have therefore been employed to model relevant ligand exchange processes. Significantly, both (1)H and (19)F NMR spectroscopy demonstrate that the exchange of carboxylate groups between [Tm(Bu(t))]Cd(κ(2)-O2CR) and the carboxylic acid RCO2H is facile on the NMR time scale, even at low temperature. Analysis of the rate of exchange as a function of concentration of RCO2H indicates that reaction occurs via an associative rather than dissociative pathway. In addition to carboxylate compounds, the thiocarboxylate derivative [Tm(Bu(t))]Cd[κ(1)-SC(O)Ph] has also been synthesized via the reaction of [Tm(Bu(t))]CdMe with thiobenzoic acid. The molecular structure of [Tm(Bu(t))]Cd[κ(1)-SC(O)Ph] has been determined by X-ray diffraction, and an interesting feature is that, in contrast to the carboxylate derivatives [Tm(Bu(t))]Cd(κ(2)-O2CR), the thiocarboxylate ligand binds in a κ(1) manner via only the sulfur atom.
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Affiliation(s)
- Ava Kreider-Mueller
- Department of Chemistry, Columbia
University, New York, New York 10027, United
States
| | - Patrick J. Quinlivan
- Department of Chemistry, Columbia
University, New York, New York 10027, United
States
| | - Jonathan S. Owen
- Department of Chemistry, Columbia
University, New York, New York 10027, United
States
| | - Gerard Parkin
- Department of Chemistry, Columbia
University, New York, New York 10027, United
States
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23
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Palmer JH, Parkin G. Influence of Benzannulation on Metal Coordination Geometries: Synthesis and Structural Characterization of Tris(2-mercapto-1-methylbenzimidazolyl)hydroborato Cadmium Bromide, {[Tm MeBenz]Cd(μ-Br)} 2.. J Mol Struct 2015; 1081:530-535. [PMID: 25601793 PMCID: PMC4296741 DOI: 10.1016/j.molstruc.2014.10.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The tris(2-mercapto-1-methylbenzimidazolyl)hydroborato cadmium complex, {[TmMeBenz]Cd(μ-Br)}2, may be synthesized via the reaction of [TmMeBenz]K with CdBr2. X-ray diffraction demonstrates that {[TmMeBenz]Cd(μ-Br)}2 exists as a dimer, which is in marked contrast to the monomeric structure of the non-benzannulated counterpart, [TmMe]CdBr, and thereby demonstrates that benzannulation of tris(2-mercapto-1-methylbenzimidazolyl)hydroborato ligands can have a distinct impact on the molecular structure of their metal complexes. In accord with this observation, density functional theory calculations indicate that the benzannulated dimers, {[TmMeBenz]Cd(μ-X)}2 (X = Cl, Br, I), are more stable with respect to dissociation than are their non-benzannulated counterparts, {[TmMe]Cd(μ-X)}2. Furthermore, the calculations also indicate that the stability of the dimer depends on the nature of X, such that the dimer becomes more stable in the sequence I < Br < Cl.
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Affiliation(s)
- Joshua H Palmer
- 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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Zhang H, Shuang S, Wang G, Guo Y, Tong X, Yang P, Chen A, Dong C, Qin Y. TiO2–graphene hybrid nanostructures by atomic layer deposition with enhanced electrochemical performance for Pb(ii) and Cd(ii) detection. RSC Adv 2015. [DOI: 10.1039/c4ra09779c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Graphene coated with TiO2 by atomic layer deposition exhibits markedly enhanced sensitivity for detection of heavy metal ions.
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Affiliation(s)
- Hongfen Zhang
- School of Pharmaceutical Science
- Shanxi Medical University
- Taiyuan 030001
- China
- Institute of Environmental Science
| | - Shaomin Shuang
- Institute of Environmental Science
- School of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan
- China
| | - Guizhen Wang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Yujing Guo
- Institute of Environmental Science
- School of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan
- China
| | - Xili Tong
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Peng Yang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
| | - Anjia Chen
- School of Pharmaceutical Science
- Shanxi Medical University
- Taiyuan 030001
- China
| | - Chuan Dong
- Institute of Environmental Science
- School of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan
- China
| | - Yong Qin
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- China
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Sisombath NS, Jalilehvand F, Schell AC, Wu Q. Lead(II) binding to the chelating agent D-penicillamine in aqueous solution. Inorg Chem 2014; 53:12459-68. [PMID: 25385465 PMCID: PMC4250370 DOI: 10.1021/ic5018714] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Indexed: 11/28/2022]
Abstract
A spectroscopic investigation of the complexes formed between the Pb(II) ion and D-penicillamine (H2Pen), a chelating agent used in the treatment of lead poisoning, was carried out on two sets of alkaline aqueous solutions with CPb(II) ≈ 10 and 100 mM, varying the H2Pen/Pb(II) molar ratio (2.0, 3.0, 4.0, 10.0). Ultraviolet-visible (UV-vis) spectra of the 10 mM Pb(II) solutions consistently showed an absorption peak at 298 nm for S(-) → Pb(II) ligand-to-metal charge-transfer. The downfield (13)C NMR chemical shift for the penicillamine COO(-) group confirmed Pb(II) coordination. The (207)Pb NMR chemical shifts were confined to a narrow range between 1806 ppm and 1873 ppm for all Pb(II)-penicillamine solutions, indicating only small variations in the speciation, even in large penicillamine excess. Those chemical shifts are considerably deshielded, relative to the solid-state (207)Pb NMR isotropic chemical shift of 909 ppm obtained for crystalline penicillaminatolead(II) with Pb(S,N,O-Pen) coordination. The Pb LIII-edge extended X-ray absorption fine structure (EXAFS) spectra obtained for these solutions were well-modeled with two Pb-S and two Pb-(N/O) bonds with mean distances 2.64 ± 0.04 Å and 2.45 ± 0.04 Å, respectively. The combined spectroscopic results, reporting δ((207)Pb) ≈ 1870 ppm and λmax ≈ 298 nm for a Pb(II)S2NO site, are consistent with a dominating 1:2 lead(II):penicillamine complex with [Pb(S,N,O-Pen)(S-HnPen)](2-n) (n = 0-1) coordination in alkaline solutions, and provide useful structural information on how penicillamine can function as an antidote against lead toxicity in vivo.
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Affiliation(s)
- Natalie S. Sisombath
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Farideh Jalilehvand
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Adam C. Schell
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Qiao Wu
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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26
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Palmer JH, Parkin G. Synthesis and structural characterization of tris(2-mercapto-1-methylbenzimidazolyl)hydroborato cadmium halide complexes, {[Tm(MeBenz)]Cd(μ-Cl)}2 and [Tm(MeBenz)]CdI: a rare example of cadmium in a trigonal bipyramidal sulfur-rich coordination environment. Dalton Trans 2014; 43:13874-82. [PMID: 25105778 PMCID: PMC4262141 DOI: 10.1039/c4dt01820f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The tris(2-mercapto-1-methylbenzimidazolyl)hydroborato cadmium complexes, {[Tm(MeBenz)]Cd(μ-Cl)}2 and [Tm(MeBenz)]CdI, have been synthesized via the reactions of [Tm(MeBenz)]K with CdCl2 and CdI2, respectively. While X-ray diffraction studies demonstrate that the iodide derivative, [Tm(MeBenz)]CdI, is a monomer, the chloride derivative, {[Tm(MeBenz)]Cd(μ-Cl)}2, exists as a dimer, which is unprecedented for Group 12 [Tm(R)]MX (X = Cl, Br, I) compounds. Furthermore, the cadmium centers of {[Tm(MeBenz)]Cd(μ-Cl)}2 are trigonal bipyramidal, which is an uncommon motif for cadmium complexes with a [S3Cl2] coordination sphere.
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Affiliation(s)
- Joshua H Palmer
- Department of Chemistry, Columbia University, New York, New York 10027, USA.
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27
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Formation of novel cadmium(II) tetrazolato complexes with Schiff bases as co-ligands via in situ [3+2] cyclo-addition. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.05.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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LIU C, HUANG CZ. Detection of Lead Ions in Water Based on the Surface Energy Transfer between Gold Nanoparticles and Fluorescent Dyes. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2014. [DOI: 10.1016/s1872-2040(14)60760-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Colorimetric detection of Cu2+ and Pb2+ ions using calix[4]arene functionalized gold nanoparticles. J CHEM SCI 2014. [DOI: 10.1007/s12039-014-0600-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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Yu F, Cangelosi VM, Zastrow ML, Tegoni M, Plegaria JS, Tebo AG, Mocny CS, Ruckthong L, Qayyum H, Pecoraro VL. Protein design: toward functional metalloenzymes. Chem Rev 2014; 114:3495-578. [PMID: 24661096 PMCID: PMC4300145 DOI: 10.1021/cr400458x] [Citation(s) in RCA: 329] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Fangting Yu
- University of Michigan, Ann Arbor, Michigan 48109, United States
| | | | | | | | | | - Alison G. Tebo
- University of Michigan, Ann Arbor, Michigan 48109, United States
| | | | - Leela Ruckthong
- University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Hira Qayyum
- University of Michigan, Ann Arbor, Michigan 48109, United States
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Rong Y, Palmer JH, Parkin G. Benzannulated tris(2-mercapto-1-imidazolyl)hydroborato ligands: tetradentate κ4-S3H binding and access to monomeric monovalent thallium in an [S3] coordination environment. Dalton Trans 2014; 43:1397-407. [PMID: 24201311 PMCID: PMC3912732 DOI: 10.1039/c3dt52418c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The benzannulated tris(mercaptoimidazolyl)borohydride sodium complex, [Tm(Bu(t)Benz)]Na, has been synthesized via the reaction of NaBH4 with 1-tert-butyl-1,3-dihydro-2H-benzimidazole-2-thione, while [Tm(MeBenz)]K has been synthesized via the reaction of KBH4 with 1-methyl-1,3-dihydro-2H-benzimidazole-2-thione. The molecular structures of the solvated adducts, {[Tm(Bu(t)Benz)]Na(THF)}2(μ-THF)2 and [Tm(MeBenz)]K(OCMe2)3, have been determined by X-ray diffraction, which demonstrates that the [Tm(R)] ligands in these complexes adopt different coordination modes to that in {[Tm(MeBenz)]Na}2(μ-THF)3. Specifically, while the [Tm(MeBenz)] ligand of the sodium complex {[Tm(MeBenz)]Na}2(μ-THF)3 adopts a κ(3)-S3 coordination mode, the potassium complex [Tm(MeBenz)]K(OCMe2)3 adopts a most uncommon inverted κ(4)-S3H coordination mode in which the potassium binds to all three sulfur donors and the hydrogen of the B-H group in a linear KH-B manner. Furthermore, the [Tm(Bu(t)Benz)] ligand of {[Tm(Bu(t)Benz)]Na(THF)}2(μ-THF)2 adopts a κ(3)-S2H coordination mode, thereby demonstrating the flexibility of this ligand system. The monovalent thallium compounds, [Tm(MeBenz)]Tl and [Tm(Bu(t)Benz)]Tl, have been obtained via the corresponding reactions of [Tm(MeBenz)]Na and [Tm(Bu(t)Benz)]Na with TlOAc. X-ray diffraction demonstrates that the three sulfur donors of the [Tm(RBenz)] ligands of both [Tm(MeBenz)]Tl and [Tm(Bu(t)Benz)]Tl chelate to thallium. This coordination mode is in marked contrast to that in other [Tm(R)]Tl compounds, which exist as dinuclear molecules wherein two of the sulfur donors coordinate to different thallium centers. As such, this observation provides further evidence that benzannulation promotes κ(3)-S3 coordination in this system.
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Affiliation(s)
- Yi Rong
- Department of Chemistry, Columbia University, New York, New York 10027, USA.
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32
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Over D, Zeng X, Bornholdt C, Marrot J, Reinaud O. Coordination of lead(II) in the supramolecular environment provided by a "two-story" calix[6]arene-based N6 ligand. Inorg Chem 2013; 52:14089-95. [PMID: 24256339 DOI: 10.1021/ic4018486] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
First insights into the coordination properties and host-guest behavior of a "two story" calix[6]aza-cryptand (1) are described. The ligand is constituted of a triazacyclononane (TACN) cap and three pyridine (PY) spacers connected to the calix[6]arene small rim. The resulting N6 donor site coordinates Pb(II) ions to give complexes that are highly stable. X-ray diffraction structures reveal a hemidirected environment for Pb(II) with strong coordination to the TACN cap and weaker bonds with the three PY residues. A guest molecule, either water or EtOH, sitting in the calixarene macrocycle and hydrogen-bonded to the phenoxyl units at the level of the small rim further stabilizes the complexes through electrostatic interactions with the metal center and the calixarene core. In-depth (1)H NMR studies confirm the host-guest behavior of the complexes in solution, with evidence of embedment of neutral guest molecules such as EtOH, BuOH, and N-Me-formamide. Hence, in spite of the presence of a N6 donor, the calixarene macrocycle can be open to guest interaction, giving rise to seven-coordinate dicationic complexes. Noteworthy also is the flexibility of the macrocycle that allows Pb(II) to adopt its preferred hemidirected environment in spite of the three covalent links connecting the calixarene core to the three PY groups. The flexibility of the system is further illustrated by the possible coordination of an exogenous anionic ligand in the exo position. Hence, compared to the previously described "one story" calix[6]aza-cryptands, ligand 1 displays several similar but also new features that are discussed.
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Affiliation(s)
- Diana Over
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Université Paris Descartes, PRES Sorbonne Paris Cité, CNRS UMR 8601 , 45 rue des Saints Pères, 75006 Paris, France
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33
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Banu L, Blagojevic V, Bohme DK. Locating Pb2+ and Zn2+ in zinc finger-like peptides using mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:1534-1542. [PMID: 23907592 DOI: 10.1007/s13361-013-0682-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 05/08/2013] [Accepted: 05/12/2013] [Indexed: 06/02/2023]
Abstract
The binding preferences of Pb(2+)and Zn(2+) in doubly charged complexes with zinc finger-like 12-residue peptides (Pep), [Mn(Pep-2(n-1)H)](2+) have been explored using tandem mass spectrometry. The peptides were synthesized strategically by blocking the N-terminus with an acetyl group and with four cysteine and/or histidine residues in positions 2, 5, 8, and 11, arranged in different motifs: CCHH, CHCH, and CCCC. The MS(2) spectra of the Pb(2+) and Zn(2+) complexes show multiple losses of water and a single methane loss and these provide a sensitive method for locating the metal dication and so elucidating its coordination. The elimination of a methane molecule indicated the position of the metal at the Cys2 residue. Whereas lead was observed to preferentially bind to cysteine residues, zinc was found to primarily bind to histidine residues and secondarily to cysteine residues. Preferential binding of lead to cysteine is preserved in the complexes with more than one Pb(2+). Key to the mechanism of the loss of water and methane is the metal dication withdrawing electrons from the proximal amidic nitrogen. This acidic nitrogen loses its hydrogen to an amidic oxygen situated four atoms away leading to formation of a five-member ring and the elimination of water.
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Affiliation(s)
- Laura Banu
- Department of Chemistry, Centre for Research in Mass Spectrometry, York University, Toronto, Ontario, M3J 1P3, Canada
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34
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Elton ES, Zhang T, Prabhakar R, Arif AM, Berreau LM. Pb(II)-Promoted Amide Cleavage: Mechanistic Comparison to a Zn(II) Analogue. Inorg Chem 2013; 52:11480-92. [DOI: 10.1021/ic401782x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Eric S. Elton
- Department
of Chemistry and Biochemistry, Utah State University, 0300 Old
Main Hill, Logan, Utah 84322-0300, United States
| | - Tingting Zhang
- Department
of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146-0431, United States
| | - Rajeev Prabhakar
- Department
of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146-0431, United States
| | - Atta M. Arif
- Department
of Chemistry, University of Utah, 315 S. 1400 E., Salt Lake City, Utah 84112-0850, United States
| | - Lisa M. Berreau
- Department
of Chemistry and Biochemistry, Utah State University, 0300 Old
Main Hill, Logan, Utah 84322-0300, United States
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35
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Rajasekharan-Nair R, Marckwordt A, Lutta ST, Schwalbe M, Biernat A, Armstrong DR, Watson AJB, Kennedy AR, Reglinski J, Spicer MD. Soft Scorpionate Anions as Platforms for Novel Heterocycles. Chemistry 2013; 19:13561-8. [DOI: 10.1002/chem.201300091] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 06/18/2013] [Indexed: 11/11/2022]
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36
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Ferhan AR, Guo L, Zhou X, Chen P, Hong S, Kim DH. Solid-Phase Colorimetric Sensor Based on Gold Nanoparticle-Loaded Polymer Brushes: Lead Detection as a Case Study. Anal Chem 2013; 85:4094-9. [DOI: 10.1021/ac4001817] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Abdul Rahim Ferhan
- School of Chemical and Biomedical
Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457
| | - Longhua Guo
- School of Chemical and Biomedical
Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457
| | - Xiaodong Zhou
- Institute of Materials Research
and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602
| | - Peng Chen
- School of Chemical and Biomedical
Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457
| | - Seungpyo Hong
- Department of Biopharmaceutical
Sciences, University of Illinois, Chicago,
Illinois 60612, United States
| | - Dong-Hwan Kim
- School of Chemical and Biomedical
Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457
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37
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Rekken BD, Brown TM, Olmstead MM, Fettinger JC, Power PP. Stable Plumbylene Dichalcogenolate Monomers with Large Differences in Their Interligand Angles and the Synthesis and Characterization of a Monothiolato Pb(II) Bromide and Lithium Trithiolato Plumbate. Inorg Chem 2013; 52:3054-62. [DOI: 10.1021/ic302513c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Brian D. Rekken
- Department of Chemistry, University of California—Davis, Davis, California
95616, United States
| | - Thomas M. Brown
- Department of Chemistry, University of California—Davis, Davis, California
95616, United States
| | - Marilyn M. Olmstead
- Department of Chemistry, University of California—Davis, Davis, California
95616, United States
| | - James C. Fettinger
- Department of Chemistry, University of California—Davis, Davis, California
95616, United States
| | - Philip P. Power
- Department of Chemistry, University of California—Davis, Davis, California
95616, United States
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38
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Abstract
A structural investigation of complexes formed between the Pb(2+) ion and glutathione (GSH, denoted AH(3) in its triprotonated form), the most abundant nonprotein thiol in biological systems, was carried out for a series of aqueous solutions at pH 8.5 and C(Pb(2+)) = 10 mM and in the solid state. The Pb L(III)-edge extended X-ray absorption fine structure (EXAFS) oscillation for a solid compound with the empirical formula [Pb(AH(2))]ClO(4) was modeled with one Pb-S and two short Pb-O bond distances at 2.64 ± 0.04 and 2.28 ± 0.04 Å, respectively. In addition, Pb···Pb interactions at 4.15 ± 0.05 Å indicate dimeric species in a network where the thiolate group forms an asymmetrical bridge between two Pb(2+) ions. In aqueous solution at the mole ratio GSH/Pb(II) = 2.0 (C(Pb(2+)) = 10 mM, pH 8.5), lead(II) complexes with two thiolate ligands form, characterized by a ligand-to-metal charge-transfer band (LMCT) S(-) → Pb(2+) at 317 nm in the UV-vis spectrum and mean Pb-S and Pb-(N/O) bond distances of 2.65 ± 0.04 and 2.51 ± 0.04 Å, respectively, from a Pb L(III)-edge EXAFS spectrum. For solutions with higher mole ratios, GSH/Pb(II) ≥ 3.0, electrospray ionization mass spectroscopy spectra identified a triglutathionyllead(II) complex, for which Pb L(III)-edge EXAFS spectroscopy shows a mean Pb-S distance of 2.65 ± 0.04 Å in PbS(3) coordination, (207)Pb NMR spectroscopy displays a chemical shift of 2793 ppm, and in the UV-vis spectrum, an S(-) → Pb(2+) LMCT band appears at 335 nm. The complex persists at high excess of GSH and also at ∼25 K in frozen glycerol (33%)/water glasses for GSH/Pb(II) mole ratios from 4.0 to 10 (C(Pb(2+)) = 10 mM) measured by Pb L(III)-edge EXAFS spectroscopy.
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Affiliation(s)
- Vicky Mah
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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Nuss G, Ozwirk A, Harum BN, Saischek G, Belaj F, Mösch‐Zanetti NC. Copper Complexes with a Hybrid Scorpionate Ligand Containing Pyridazine‐3‐thione. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200158] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Gernot Nuss
- Institut für Chemie, Karl‐Franzens‐Universität Graz, Stremayrgasse 16, 8010 Graz, Austria
| | - Anja Ozwirk
- Institut für Chemie, Karl‐Franzens‐Universität Graz, Stremayrgasse 16, 8010 Graz, Austria
| | - Bastian N. Harum
- Institut für Chemie, Karl‐Franzens‐Universität Graz, Stremayrgasse 16, 8010 Graz, Austria
| | - Gerald Saischek
- Institut für Chemie, Karl‐Franzens‐Universität Graz, Stremayrgasse 16, 8010 Graz, Austria
| | - Ferdinand Belaj
- Institut für Chemie, Karl‐Franzens‐Universität Graz, Stremayrgasse 16, 8010 Graz, Austria
| | - Nadia C. Mösch‐Zanetti
- Institut für Chemie, Karl‐Franzens‐Universität Graz, Stremayrgasse 16, 8010 Graz, Austria
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40
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Iodide-induced adsorption of lead(II) ion on a glassy carbon electrode modified with ferroferric oxide nanoparticles. Mikrochim Acta 2012. [DOI: 10.1007/s00604-012-0793-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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41
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Bootharaju MS, Pradeep T. Investigation into the reactivity of unsupported and supported Ag7 and Ag8 clusters with toxic metal ions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:8134-43. [PMID: 21667956 DOI: 10.1021/la200947c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We report the chemical interactions of unsupported and alumina-supported Ag(7) and Ag(8) clusters protected with MSA (mercaptosuccinic acid) with heavy metal ions Hg(II), Cd(II), and Pb(II) in water at different concentrations. The investigation was carried out to determine the feasibility of this interesting new class of materials called quantum clusters for water purification. These systems were studied using various spectroscopic and microscopic techniques such as ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, dynamic light scattering, zeta potential measurements, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and photoluminescence spectroscopy and in detail by X-ray photoelectron spectroscopy. We observed that the metal ions interact with both the silver atoms of the clusters and the functional groups of the capping agent (MSA). The mercuric ions were reduced to metallic mercury by both supported and unsupported clusters, due to the feasibility of the redox reaction, whereas no reduction was observed for Cd(II) and Pb(II). As a result of the interaction, the luminescence of the cluster is lost which can be used to sense Hg(II). At lower concentrations, the metal ions were chemically bonded to the carboxylate groups of MSA. Absence of reduction of Hg(II) at lower concentration is due to the chemical affinity of the ligands and the lower silver content per cluster compared to the number of carboxylate groups.
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Affiliation(s)
- M S Bootharaju
- DST Unit of Nanoscience (DST UNS), Department of Chemistry, Indian Institute of Technology Madras, Chennai-600 036, India
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Sheela T, Basavanna S, Viswanatha R, Kalachar HCB, Naik YA. Barium Hydrogen Phosphate Modified Carbon Paste Electrode for the Simultaneous Determination of Cadmium and Lead by Differential Pulse Anodic Stripping Voltammetry. ELECTROANAL 2011. [DOI: 10.1002/elan.201000679] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wang H, Ou LML, Suo Y, Yu HZ. Computer-Readable DNAzyme Assay on Disc for ppb-Level Lead Detection. Anal Chem 2011; 83:1557-63. [DOI: 10.1021/ac103177w] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Honglun Wang
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810001, P.R. China
| | - Lily M. L. Ou
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Yourui Suo
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810001, P.R. China
| | - Hua-Zhong Yu
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
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Neupane KP, Pecoraro VL. Probing a homoleptic PbS3 coordination environment in a designed peptide using 207Pb NMR spectroscopy: implications for understanding the molecular basis of lead toxicity. Angew Chem Int Ed Engl 2011; 49:8177-80. [PMID: 20859984 DOI: 10.1002/anie.201004429] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kosh P Neupane
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
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Akhbari K, Morsali A. Reversible solid state structural transformation of a polyhapto lead(ii) polymeric chain to a tetrahapto lead(ii) two-dimensional network by thermal dehydration with no change in nanoplate morphology. CrystEngComm 2011. [DOI: 10.1039/c0ce00404a] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Neupane KP, Pecoraro VL. Probing a Homoleptic PbS3 Coordination Environment in a Designed Peptide Using 207Pb NMR Spectroscopy: Implications for Understanding the Molecular Basis of Lead Toxicity. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201004429] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Njua EY, Steiner A, Stahl L. Syntheses and structures of cationic and neutral, homo- and heteroleptic tert-butoxides of the group 4 metals. Inorg Chem 2010; 49:2163-72. [PMID: 20121153 DOI: 10.1021/ic9019537] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The utility of tri-tert-butoxystannate as a chelating tridentate ligand for group 4 metals was investigated. The highly Lewis acidic metals degraded the stannate ion in a series of tert-butoxide abstraction steps to produce a variety of group 4 tert-butoxides. A total of 1 equiv of NaSn(O(t)Bu)(3) reacted with cis-MCl(4)(THF)(2) [M = Zr (1), Hf (2)] in THF solutions to furnish the salts fac-{[M(O(t)Bu)(3)(THF)(3)](SnCl(3))}, which are separated ion pairs featuring weakly coordinating trichlorostannate ions. Neutral complexes, namely, [M(O(t)Bu)(2)Cl(2)(THF)(2)] [M = Zr (3), Hf (4)], were isolated when 2/3 equiv of sodium stannate was used in these reactions. Titanium tetrachloride formed analogues neither of 1 and 2 nor of 3 and 4, but Ti(O(t)Bu)(3)Cl reacted with silver triflate to give [Ti(O(t)Bu)(2)(OTf)(2)(THF)(2)] (5). Anion exchange of triflate for trichlorostannate transformed 1 to the contact ion pair fac-[Zr(O(t)Bu)(3)OTf(THF)(2)] (6). A total of 2 equiv of NaSn(O(t)Bu)(3) reacted with cis-MCl(4)(THF)(2) to give the complexes fac-[Sn(mu-O(t)Bu)(3)M(O(t)Bu)(3)] [M = Zr (7), Hf (8)]. Tri-tert-butoxystannate may be used as a selective alkoxylating agent for group 4 metals, and it can be transferred to these metals intact if their Lewis acidity is appropriately attenuated as in fac-{[M(O(t)Bu)(3)(THF)(3)](SnCl(3))}. Single-crystal X-ray studies revealed distorted octahedral coordination geometries for all compounds (1-8), with 1, 2, 7, and 8 being crystallographically C(3) symmetric.
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Affiliation(s)
- Edmond Y Njua
- Department of Chemistry, University of North Dakota, Grand Forks, North Dakota 58202-9024, USA
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49
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Crossley IR, Hill AF, Willis AC. Metallaboratranes: Bis- and Tris(methimazolyl)borane Complexes of Group 9 Metal Carbonyls and Thiocarbonyls. Organometallics 2009. [DOI: 10.1021/om900655k] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ian R. Crossley
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, Australian Capital Territory, Australia
- Department of Chemistry, University of Sussex, Brighton, United Kingdom
| | - Anthony F. Hill
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Anthony C. Willis
- Research School of Chemistry, Institute of Advanced Studies, Australian National University, Canberra, Australian Capital Territory, Australia
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Li J, Guo S, Zhai Y, Wang E. High-sensitivity determination of lead and cadmium based on the Nafion-graphene composite film. Anal Chim Acta 2009; 649:196-201. [DOI: 10.1016/j.aca.2009.07.030] [Citation(s) in RCA: 368] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2009] [Revised: 07/12/2009] [Accepted: 07/13/2009] [Indexed: 11/29/2022]
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