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Heteroleptic bipyridine complex: Synthesis, spectral and structural analyses, and interconversion of its {Mo3S7} core to {Mo3S4} core. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Deng L, Dong X, An DL, Weng WZ, Zhou ZH. Gas Adsorption of Mixed-Valence Trinuclear Oxothiomolybdenum Glycolates. Inorg Chem 2020; 59:4874-4881. [DOI: 10.1021/acs.inorgchem.0c00118] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Lan Deng
- State Key Laboratory for Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xing Dong
- State Key Laboratory for Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Dong-Li An
- State Key Laboratory for Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Wei-Zheng Weng
- State Key Laboratory for Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zhao-Hui Zhou
- State Key Laboratory for Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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3
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Fontenot PR, Shan B, Wang B, Simpson S, Ragunathan G, Greene AF, Obanda A, Hunt LA, Hammer NI, Webster CE, Mague JT, Schmehl RH, Donahue JP. Photocatalytic H 2-Evolution by Homogeneous Molybdenum Sulfide Clusters Supported by Dithiocarbamate Ligands. Inorg Chem 2019; 58:16458-16474. [PMID: 31790221 DOI: 10.1021/acs.inorgchem.9b02252] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Irradiation at 460 nm of [Mo3(μ3-S)(μ2-S2)3(S2CNR2)3]I ([2a]I, R = Me; [2b]I, R = Et; [2c]I, R = iBu; [2d]I, R = CH2C6H5) in a mixed aqueous-polar organic medium with [Ru(bipy)3]2+ as photosensitizer and Et3N as electron donor leads to H2 evolution. Maximum activity (300 turnovers, 3 h) is found with R = iBu in 1:9 H2O:MeCN; diminished activity is attributed to deterioration of [Ru(bipy)3]2+. Monitoring of the photolysis mixture by mass spectrometry suggests transformation of [Mo3(μ3-S)(μ2-S2)3(S2CNR2)3]+ to [Mo3(μ3-S)(μ2-S)3(S2CNR2)3]+ via extrusion of sulfur on a time scale of minutes without accumulation of the intermediate [Mo3S6(S2CNR2)3]+ or [Mo3S5(S2CNR2)3]+ species. Deliberate preparation of [Mo3S4(S2CNEt2)3]+ ([3]+) and treatment with Et2NCS21- yields [Mo3S4(S2CNEt2)4] (4), where the fourth dithiocarbamate ligand bridges one edge of the Mo3 triangle. Photolysis of 4 leads to H2 evolution but at ∼25% the level observed for [Mo3S7(S2CNEt2)3]+. Early time monitoring of the photolyses shows that [Mo3S4(S2CNEt2)4] evolves H2 immediately and at constant rate, while [Mo3S7(S2CNEt2)3]+ shows a distinctive incubation prior to a more rapid H2 evolution rate. This observation implies the operation of catalysts of different identity in the two cases. Photolysis solutions of [Mo3S7(S2CNiBu2)3]+ left undisturbed over 24 h deposit the asymmetric Mo6 cluster [(iBu2NCS2)3(μ2-S2)2(μ3-S)Mo3](μ3-S)(μ3-η2,η1-S',η1-S″-S2)[Mo3(μ2-S)3(μ3-S)(S2CNiBu2)2(μ2-S2CNiBu2)] in crystalline form, suggesting that species with this hexametallic composition and core topology are the probable H2-evolving catalysts in photolyses beginning with [Mo3S7(S2CNR2)3]+. When used as solvent, N,N-dimethylformamide (DMF) suppresses H2-evolution but to a greater degree for [Mo3S4(S2CNEt2)4] than for [Mo3S7(S2CNEt2)3]+. Recrystallization of [Mo3S4(S2CNEt2)4] from DMF affords [Mo3S4(S2CNEt2)4(η1,κO-DMF)] (5), implying that inhibition by DMF arises from competition for a Mo coordination site that is requisite for H2 evolution. Computational assessment of [Mo3S4(S2CNMe2)3]+ following addition of 2H+ and 2e- suggests a Mo(H)-μ2(SH) intermediate as the lowest energy species for H2 elimination. An analogous pathway may be available to the Mo6 cluster via dissociation of one end of the μ2-S2CNR2 ligand, a known hemilabile ligand type, in the [Mo3S4]4+ fragment.
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Affiliation(s)
- Patricia R Fontenot
- Department of Chemistry , Tulane University , 6400 Freret Street , New Orleans , Louisiana 70118-5698 , United States
| | - Bing Shan
- Department of Chemistry , Tulane University , 6400 Freret Street , New Orleans , Louisiana 70118-5698 , United States
| | - Bo Wang
- Department of Chemistry , Tulane University , 6400 Freret Street , New Orleans , Louisiana 70118-5698 , United States
| | - Spenser Simpson
- Department of Chemistry , Tulane University , 6400 Freret Street , New Orleans , Louisiana 70118-5698 , United States
| | - Gayathri Ragunathan
- Department of Chemistry , Tulane University , 6400 Freret Street , New Orleans , Louisiana 70118-5698 , United States
| | - Angelique F Greene
- Department of Chemistry , Tulane University , 6400 Freret Street , New Orleans , Louisiana 70118-5698 , United States
| | - Antony Obanda
- Department of Chemistry , Tulane University , 6400 Freret Street , New Orleans , Louisiana 70118-5698 , United States
| | - Leigh Anna Hunt
- Department of Chemistry and Biochemistry , University of Mississippi , Oxford , Mississippi 38655 , United States
| | - Nathan I Hammer
- Department of Chemistry and Biochemistry , University of Mississippi , Oxford , Mississippi 38655 , United States
| | - Charles Edwin Webster
- Department of Chemistry , Mississippi State University , P.O. Box 9573, Mississippi State , Mississippi 39762-9573 , United States
| | - Joel T Mague
- Department of Chemistry , Tulane University , 6400 Freret Street , New Orleans , Louisiana 70118-5698 , United States
| | - Russell H Schmehl
- Department of Chemistry , Tulane University , 6400 Freret Street , New Orleans , Louisiana 70118-5698 , United States
| | - James P Donahue
- Department of Chemistry , Tulane University , 6400 Freret Street , New Orleans , Louisiana 70118-5698 , United States
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4
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Sokolov MN, Gushchin AL. On the Way Towards Fine Inorganic Synthesis: Manipulating Bridging Ligands in Chalcogenide Clusters. RUSS J COORD CHEM+ 2019. [DOI: 10.1134/s1070328419060083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Haiduc I. Inverse coordination – An emerging new chemical concept. Oxygen and other chalcogens as coordination centers. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.02.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Kumar CA, Saha A, Raghavachari K. Bond Activation and Hydrogen Evolution from Water through Reactions with M 3S 4 (M = Mo, W) and W 3S 3 Anionic Clusters. J Phys Chem A 2017; 121:1760-1767. [PMID: 28212031 DOI: 10.1021/acs.jpca.6b11879] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Transition metal sulfides (TMS) are being investigated with increased frequency because of their ability to efficiently catalyze the hydrogen evolution reaction. We have studied the trimetallic TMS cluster ions, Mo3S4-, W3S4-, and W3S3-, and probed their efficiency for bond activation and hydrogen evolution from water. These clusters have geometries that are related to the edge sites on bulk MoS2 surfaces that are known to play a role in hydrogen evolution. Using density functional theory, the electronic structures of these clusters and their chemical reactivity with water have been investigated. The reaction mechanism involves the initial formation of hydroxyl and thiol groups, hydrogen migration to form an intermediate with a metal hydride bond, and finally, combination of a hydride and a proton to eliminate H2. Using this mechanism, free energy profiles of the reactions of the three metal clusters with water have been constructed. Unlike previous reactivity studies of other related cluster systems, there is no overall energy barrier in the reactions involving the M3S4 systems. The energy required for the rate-determining step of the reaction (the initial addition of the cluster by water) is lower than the separated reactants (-0.8 kcal/mol for Mo and -5.1 kcal/mol for W). They confirm the M3S4- cluster's ability to efficiently activate the chemical bonds in water to release H2. Though the W3S3- cluster is not as efficient at bond activation, it provides insights into the factors that contribute to the success of the M3S4 anionic systems in hydrogen evolution.
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Affiliation(s)
- Corrine A Kumar
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States
| | - Arjun Saha
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States
| | - Krishnan Raghavachari
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States
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7
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Bustelo E, Gushchin AL, Fernández-Trujillo MJ, Basallote MG, Algarra AG. On the Critical Effect of the Metal (Mo vs. W) on the [3+2] Cycloaddition Reaction of M3 S4 Clusters with Alkynes: Insights from Experiment and Theory. Chemistry 2015; 21:14823-33. [PMID: 26383190 DOI: 10.1002/chem.201502644] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Indexed: 01/19/2023]
Abstract
Whereas the cluster [Mo3 S4 (acac)3 (py)3 ](+) ([1](+) , acac=acetylacetonate, py=pyridine) reacts with a variety of alkynes, the cluster [W3 S4 (acac)3 (py)3 ](+) ([2](+) ) remains unaffected under the same conditions. The reactions of cluster [1](+) show polyphasic kinetics, and in all cases clusters bearing a bridging dithiolene moiety are formed in the first step through the concerted [3+2] cycloaddition between the C≡C atoms of the alkyne and a Mo(μ-S)2 moiety of the cluster. A computational study has been conducted to analyze the effect of the metal on these concerted [3+2] cycloaddition reactions. The calculations suggest that the reactions of cluster [2](+) with alkynes feature ΔG(≠) values only slightly larger than its molybdenum analogue, however, the differences in the reaction free energies between both metal clusters and the same alkyne reach up to approximately 10 kcal mol(-1) , therefore indicating that the differences in the reactivity are essentially thermodynamic. The activation strain model (ASM) has been used to get more insights into the critical effect of the metal center in these cycloadditions, and the results reveal that the change in reactivity is entirely explained on the basis of the differences in the interaction energies Eint between the cluster and the alkyne. Further decomposition of the Eint values through the localized molecular orbital-energy decomposition analysis (LMO-EDA) indicates that substitution of the Mo atoms in cluster [1](+) by W induces changes in the electronic structure of the cluster that result in weaker intra- and inter-fragment orbital interactions.
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Affiliation(s)
- Emilio Bustelo
- Departmento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Campus Universitario de Puerto Real, Universidad de Cádiz, 11510 Puerto Real, Cádiz (Spain)
| | - Artem L Gushchin
- Nikolaev Institute of Inorganic Chemistry, Russian Academy of Sciences, Novosibirsk State University, 630090 Novosibirsk (Russia)
| | - M Jesús Fernández-Trujillo
- Departmento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Campus Universitario de Puerto Real, Universidad de Cádiz, 11510 Puerto Real, Cádiz (Spain)
| | - Manuel G Basallote
- Departmento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Campus Universitario de Puerto Real, Universidad de Cádiz, 11510 Puerto Real, Cádiz (Spain).
| | - Andrés G Algarra
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691 Stockholm (Sweden).
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8
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Sparacino-Watkins C, Stolz JF, Basu P. Nitrate and periplasmic nitrate reductases. Chem Soc Rev 2014; 43:676-706. [PMID: 24141308 DOI: 10.1039/c3cs60249d] [Citation(s) in RCA: 189] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The nitrate anion is a simple, abundant and relatively stable species, yet plays a significant role in global cycling of nitrogen, global climate change, and human health. Although it has been known for quite some time that nitrate is an important species environmentally, recent studies have identified potential medical applications. In this respect the nitrate anion remains an enigmatic species that promises to offer exciting science in years to come. Many bacteria readily reduce nitrate to nitrite via nitrate reductases. Classified into three distinct types--periplasmic nitrate reductase (Nap), respiratory nitrate reductase (Nar) and assimilatory nitrate reductase (Nas), they are defined by their cellular location, operon organization and active site structure. Of these, Nap proteins are the focus of this review. Despite similarities in the catalytic and spectroscopic properties Nap from different Proteobacteria are phylogenetically distinct. This review has two major sections: in the first section, nitrate in the nitrogen cycle and human health, taxonomy of nitrate reductases, assimilatory and dissimilatory nitrate reduction, cellular locations of nitrate reductases, structural and redox chemistry are discussed. The second section focuses on the features of periplasmic nitrate reductase where the catalytic subunit of the Nap and its kinetic properties, auxiliary Nap proteins, operon structure and phylogenetic relationships are discussed.
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9
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van Stipdonk MJ, Basu P, Dille SA, Gibson JK, Berden G, Oomens J. Infrared multiple photon dissociation spectroscopy of a gas-phase oxo-molybdenum complex with 1,2-dithiolene ligands. J Phys Chem A 2014; 118:5407-18. [PMID: 24988369 PMCID: PMC4338922 DOI: 10.1021/jp503222v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
![]()
Electrospray
ionization (ESI) in the negative ion mode was used
to create anionic, gas-phase oxo-molybdenum complexes with dithiolene
ligands. By varying ESI and ion transfer conditions, both doubly and
singly charged forms of the complex, with identical formulas, could
be observed. Collision-induced dissociation (CID) of the dianion generated
exclusively the monoanion, while fragmentation of the monoanion involved
decomposition of the dithiolene ligands. The intrinsic structure of
the monoanion and the dianion were determined by using wavelength-selective
infrared multiple-photon dissociation (IRMPD) spectroscopy and density
functional theory calculations. The IRMPD spectrum for the dianion
exhibits absorptions that can be assigned to (ligand) C=C,
C–S, C—C≡N, and Mo=O stretches. Comparison
of the IRMPD spectrum to spectra predicted for various possible conformations
allows assignment of a pseudo square pyramidal structure with C2v symmetry, equatorial coordination
of MoO2+ by the S atoms of the dithiolene ligands, and
a singlet spin state. A single absorption was observed for the oxidized
complex. When the same scaling factor employed for the dianion is
used for the oxidized version, theoretical spectra suggest that the
absorption is the Mo=O stretch for a distorted square pyramidal
structure and doublet spin state. A predicted change in conformation
upon oxidation of the dianion is consistent with a proposed bonding
scheme for the bent-metallocene dithiolene compounds [Lauher, J. W.; Hoffmann, R. 1976, 98, 1729−1742], where a large
folding of the dithiolene moiety along the S···S vector
is dependent on the occupancy of the in-plane metal d-orbital.
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Affiliation(s)
- Michael J van Stipdonk
- Department of Chemistry and Biochemistry, Duquesne University , 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, United States
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10
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Linkage Isomerism in [Mo3(μ3-S)(μ2-SSe)3(dtp)3]Cl: Preparation and Characterization of Two Isomers with Different Coordination Mode of the μ2-SSe Ligand. J CLUST SCI 2014. [DOI: 10.1007/s10876-014-0720-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Hernandez‐Molina R, Gonzalez‐Platas J, Vicent C. Isolation of a New
C
s
‐Symmetrized Mo
3
(μ
3
‐S)(μ‐S)(μ‐S
2
)
2
Structural Type Through Complementary Association with a Cubane‐Type Mo
3
NiS
4
Cluster. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101326] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rita Hernandez‐Molina
- Dpto de Química Inorgánica, Facultad de Química, Universidad de La Laguna, 38200 La Laguna, Tenerife, Spain, Fax: +34‐922315461
| | - Javier Gonzalez‐Platas
- Dpto Física Fundamental II, Servicio Integrado de Difracción de Rayos X, Universidad de La Laguna, 38200 La Laguna, Tenerife, Spain
| | - Cristian Vicent
- Serveis Centrals d'Instrumentació Científica, Universitat Jaume I, Avda. Sos Baynat s/n, 12071 Castelló, Spain
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