Synthesis of zinc and cadmium O-alkyl thiocarbonate and dithiocarbonate complexes and a cationic zinc hydrosulfide complex

Spiropulos, Nicholas G.; Standley, Eric A.; Shaw, Ian; Ingalls, Benjamin L.; Diebels, Bryan; Krawczyk, Sylvanna V.; Gherman, Benjamin F.; Arif, Atta M.; Brown, Eric C.

doi:10.1016/j.ica.2012.01.040

Cited by 17 publications

(21 citation statements)

References 54 publications

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“…We must preserve as many features of the protein as possible in order to successfully mimic the active sites of CA, and to try to synthesize water-soluble molecules to directly measure the activity of CO2 hydration [26]. A Zn catalyst with a structure mimicking CA was synthesized; Zn catalyst (1) had 4-coordinated tris(2-pyridylmethyl)amine (TPA) as the ligand [27][28][29]. In addition, the ligand 6-((bis(pyridin-2-ylmethyl)amino)methyl)pyridin-2-ol (TPA-OH) was used to synthesize Zn catalyst (2), considering the second coordination sphere, including Thr-199 in CA ( Figure 2).…”

Section: Introductionmentioning

confidence: 99%

Kinetic Study of CO2 Hydration by Small-Molecule Catalysts with A Second Coordination Sphere that Mimic the Effect of the Thr-199 Residue of Carbonic Anhydrase

Park¹,

Lee²

2019

Biomimetics

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Zinc complexes were synthesized as catalysts that mimic the ability of carbonic anhydrase (CA) for the CO2 hydration reaction (H2O + CO2 → H+ + HCO3-). For these complexes, a tris(2-pyridylmethyl)amine (TPA) ligand mimicking only the active site, and a 6-((bis(pyridin-2-ylmethyl)amino)methyl)pyridin-2-ol (TPA-OH) ligand mimicking the hydrogen-bonding network of the secondary coordination sphere of CA were used. Potentiometric pH titration was used to determine the deprotonation ability of the Zn complexes, and their pKa values were found to be 8.0 and 6.8, respectively. Stopped-flow spectrophotometry was used to confirm the CO2 hydration rate. The rate constants were measured to be 648.4 and 730.6 M-1s-1, respectively. The low pKa value was attributed to the hydrogen-bonding network of the secondary coordination sphere of the catalyst that mimics the behavior of CA, and this was found to increase the CO2 hydration rate of the catalyst.

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Section: Introductionmentioning

confidence: 99%

Kinetic Study of CO2 Hydration by Small-Molecule Catalysts with A Second Coordination Sphere that Mimic the Effect of the Thr-199 Residue of Carbonic Anhydrase

Park¹,

Lee²

2019

Biomimetics

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“…A study of the angles at cadmium atoms with coordination number eight in the CSD reveals that coordination of two ligands including 4,7,13,16,21,24-hexaoxa-l,10-diazabicyclo-[8.8.8]hexacosan [23] and tris(2-pyridylmethyl) amine [24], to the cadmium atom produces the cube geometry with the lowest distortion, and our complex with the NTE ligand is now the third example to show this geometry.…”

Section: Resultsmentioning

confidence: 99%

Structural study of the coordination behavior of a tetradentate NO₃-donor amino alcohol ligand toward a Cd^II:Hg^II mixture

Mardani

Golsanamlou

Khodavandegar

et al. 2017

Zeitschrift Für Naturforschung B

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Abstract:In this work, the reaction of 2,2′,2″-nitrilotriethanol (NTE) with a 1:1 mixture of CdI 2 and HgI 2 is investigated. The complex [Cd(NTE) 2 ][Hg 2 (μ-I) 2 I 4 ] was synthesized and identified by elemental analysis, FT-IR, 1 H NMR spectroscopy and single-crystal X-ray diffraction. The structure of the [HNTE]Cl salt is also presented. In the crystal structure of the complex, the cadmium atom has a CdN 2 O 6 environment in a slightly distorted cube geometry. This geometry is one of the rare cube geometries with a minimum distortion among the Cambridge Structural Database structures for cadmium complexes. The anionic moiety has a binuclear structure with the mercury atoms being in tetrahedral environments. In the network of the complex, in addition to O−H · · · I hydrogen bonds, there are I · · · I interactions which lead to ten-membered rings.

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“…[10][11][12][13] The bond lengths of Zn-N are in the range 1.9776(18)-2.320(2) Å, which are also in the normal range and comparable with those documented previously. [14][15][16][17][18][19] The result of a bond valence calculation reveals that all zinc ions are in a +2 oxidation state [Zn(1): 2.037; Synthesis, structure, photoluminescent and semiconductor properties of, and theoretical calculations for, a novel zinc complex Fig. 1 ORTEP drawing of 1 with 40% thermal ellipsoids and hydrogen atoms being omitted for clarity.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Structure, Photoluminescent and Semiconductor Properties of, and Theoretical Calculations for, a Novel Zinc Complex

Chen

Huang

et al. 2017

Journal of Chemical Research

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A novel zinc complex [Zn3(2,2′-bi-1H-imidazole)2(1H-biimidazole)2(SO4)2] n has been synthesised through a solvothermal reaction and structurally characterised by single-crystal X-ray diffraction. It has a one-dimensional chain-like structure with both tetrahedral and square pyramidal zinc atoms. A three-dimensional supramolecular framework is constructed through hydrogen-bonding interactions. Photoluminescence shows that the complex displays an emission in the blue region of the light spectrum that time-dependent density functional theory calculations reveal can be attributed to ligand-to-ligand charge transfer. Solid-state diffuse reflectance measurements show the existence of a narrow optical band gap of 2.08 eV.

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Synthesis of zinc and cadmium O-alkyl thiocarbonate and dithiocarbonate complexes and a cationic zinc hydrosulfide complex

Cited by 17 publications

References 54 publications

Kinetic Study of CO2 Hydration by Small-Molecule Catalysts with A Second Coordination Sphere that Mimic the Effect of the Thr-199 Residue of Carbonic Anhydrase

Kinetic Study of CO2 Hydration by Small-Molecule Catalysts with A Second Coordination Sphere that Mimic the Effect of the Thr-199 Residue of Carbonic Anhydrase

Structural study of the coordination behavior of a tetradentate NO₃-donor amino alcohol ligand toward a Cd^II:Hg^II mixture

Synthesis, Structure, Photoluminescent and Semiconductor Properties of, and Theoretical Calculations for, a Novel Zinc Complex

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Synthesis of zinc and cadmium O-alkyl thiocarbonate and dithiocarbonate complexes and a cationic zinc hydrosulfide complex

Cited by 17 publications

References 54 publications

Kinetic Study of CO2 Hydration by Small-Molecule Catalysts with A Second Coordination Sphere that Mimic the Effect of the Thr-199 Residue of Carbonic Anhydrase

Kinetic Study of CO2 Hydration by Small-Molecule Catalysts with A Second Coordination Sphere that Mimic the Effect of the Thr-199 Residue of Carbonic Anhydrase

Structural study of the coordination behavior of a tetradentate NO3-donor amino alcohol ligand toward a CdII:HgII mixture

Synthesis, Structure, Photoluminescent and Semiconductor Properties of, and Theoretical Calculations for, a Novel Zinc Complex

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Structural study of the coordination behavior of a tetradentate NO₃-donor amino alcohol ligand toward a Cd^II:Hg^II mixture