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Landrini M, Patel R, Tyrrell-Thrower J, Macchioni A, Hughes DL, Tensi L, Hrobárik P, Rocchigiani L. Exploring Ligand Effects on Structure, Bonding, and Photolytic Hydride Transfer of Cationic Gold(I) Bridging Hydride Complexes of Molybdocene and Tungstenocene. Inorg Chem 2024; 63:13525-13545. [PMID: 38989543 DOI: 10.1021/acs.inorgchem.4c01655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
A diverse family of heterobimetallic bridging hydride adducts of the type [LAu(μ-H)2MCp2][X] (L = 1,3-bis(2,6-diisopropylphenyl)imidazole-2-ylidene, IPr; 1,3-bis(1-adamantyl)imidazole-2-ylidene, IAd; 1,3-bis(2,6-di-iso-propylphenyl)-5,5-dimethyl-4,6-diketopyrimidinyl-2-ylidene, DippDAC; triphenylphosphine, PPh3; 2-di-tert-butylphosphino-2',4',6'-triisopropylbiphenyl, tBuXPhos; X = SbF6-, BF4- or TfO-) was synthesized by reacting group VI metallocene dihydrides Cp2MH2 (Cp = cyclopentadienyl anion; M = Mo, W) with cationic gold(I) complexes [LAu(NCMe)][X]. Trimetallic [L'Au2(μ-H)2WCp2][X]2 and tetrametallic [L'Au2{(μ-H)2WCp2}2] [X]2 complexes (L' = rac-2,2'-bis(diphenylphosphino)-1,1'-binaphthalene or bis(diphenylphosphinomethane)) were obtained by reacting digold [L'{Au(NCMe)}2][X]2 with Cp2WH2 in a 1:1 and a 1:2 stoichiometry. Accessing such a broad structural diversity allowed us to pinpoint roles played by the ancillary ligands and group VI metals on the bonding properties of this family of bridging hydrides. In particular, a clear effect of the ligand on the interaction energy and electronic structure was observed, with important implications on photolytic reactivity. UV or visible light irradiation, indeed, leads to the selective cleavage of the heterobimetallic Au(μ-H)2M arrangement and formation of molecular gold hydrides. The photolysis was found to be chromoselective (wavelength-dependent), which can be ascribed to different charge redistributions upon excitation to the first (Kasha's reactivity) and higher (anti-Kasha's reactivity) excited states.
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Affiliation(s)
- Martina Landrini
- Department of Chemistry, Biology and Biotechnology, University of Perugia and CIRCC, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Rohan Patel
- School of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, U.K
| | - Joshua Tyrrell-Thrower
- School of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, U.K
| | - Alceo Macchioni
- Department of Chemistry, Biology and Biotechnology, University of Perugia and CIRCC, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - David L Hughes
- School of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, U.K
| | - Leonardo Tensi
- Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo 1, 06123 Perugia, Italy
| | - Peter Hrobárik
- Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, Ilkovičova 6, SK-84215 Bratislava, Slovakia
| | - Luca Rocchigiani
- Department of Chemistry, Biology and Biotechnology, University of Perugia and CIRCC, Via Elce di Sotto 8, 06123 Perugia, Italy
- School of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, U.K
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2
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Martín J, Schörgenhumer J, Biedrzycki M, Nevado C. (P^N^C) Ligands to Stabilize Gold(III): A Straightforward Access to Hydroxo, Formate, and Hydride Complexes. Inorg Chem 2024; 63:8390-8396. [PMID: 38657169 PMCID: PMC11080065 DOI: 10.1021/acs.inorgchem.4c00788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 04/09/2024] [Accepted: 04/10/2024] [Indexed: 04/26/2024]
Abstract
A novel class of (P^N^C) pincer ligands capable of stabilizing elusive gold(III) species is reported here. Straightforward access to (P^N^C)gold(III) hydroxo, formate, and hydride complexes has been streamlined by first incorporating a cycloauration step devoid of toxic metals or harsh conditions. The resulting gold complexes exhibit remarkable stability in solution as well as in the solid state under ambient conditions, which enabled their characterization by X-ray diffraction analyses. Interestingly, the influence of the ligand allowed the preparation of gold(III)-hydrides using mild hydride donors such as H-Bpin, which contrasts with sensitive super hydrides or strong acids and cryogenic conditions employed in previous protocols. A detailed bonding characterization of these species is complemented by reactivity studies.
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Affiliation(s)
- Jaime Martín
- Department of Chemistry, University
of Zurich, Winterthurerstrasse 190, Zurich, CH 8057, Switzerland
| | - Johannes Schörgenhumer
- Department of Chemistry, University
of Zurich, Winterthurerstrasse 190, Zurich, CH 8057, Switzerland
| | - Michał Biedrzycki
- Department of Chemistry, University
of Zurich, Winterthurerstrasse 190, Zurich, CH 8057, Switzerland
| | - Cristina Nevado
- Department of Chemistry, University
of Zurich, Winterthurerstrasse 190, Zurich, CH 8057, Switzerland
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3
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Rossi E, Sorbelli D, Belanzoni P, Belpassi L, Ciancaleoni G. Monomeric gold hydrides for carbon dioxide reduction: ligand effect on the reactivity. Chemistry 2024; 30:e202303512. [PMID: 38189856 DOI: 10.1002/chem.202303512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/19/2023] [Accepted: 01/08/2024] [Indexed: 01/09/2024]
Abstract
We analyzed the ligand electronic effect in the reaction between a [LAu(I)H]0/- hydride species and CO2, leading to a coordinated formate [LAu(HCOO)]0/-. We explored 20 different ligands, such as carbenes, phosphines and others, carefully selected to cover a wide range of electron-donor and -acceptor properties. We included in the study the only ligand, an NHC-coordinated diphosphene, that, thus far, experimentally demonstrated facile and reversible reaction between the monomeric gold(I) hydride and carbon dioxide. We elucidated the previously unknown reaction mechanism, which resulted to be concerted and common to all the ligands: the gold-hydrogen bond attacks the carbon atom of CO2 with one oxygen atom coordinating to the gold center. A correlation between the ligand σ donor ability, which affects the electron density at the reactive site, and the kinetic activation barriers of the reaction has been found. This systematic study offers useful guidelines for the rational design of new ligands for this reaction, while suggesting a few promising and experimentally accessible potential candidates for the stoichiometric or catalytic CO2 activation.
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Affiliation(s)
- Elisa Rossi
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, I-56124, Italy
| | - Diego Sorbelli
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, I-06123, Italy
- Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, IL, 60637, US
| | - Paola Belanzoni
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, I-06123, Italy
- CNR Institute of Chemical Science and Technologies "Giulio Natta" (CNR-SCITEC), c/o Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, I-06123, Italy
| | - Leonardo Belpassi
- CNR Institute of Chemical Science and Technologies "Giulio Natta" (CNR-SCITEC), c/o Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, I-06123, Italy
| | - Gianluca Ciancaleoni
- Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, I-56124, Italy
- CIRCC, Bari, Italy
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Navarro M, Holzapfel M, Campos J. A Cavity-Shaped Gold(I) Fragment Enables CO 2 Insertion into Au-OH and Au-NH Bonds. Inorg Chem 2023. [PMID: 37367828 DOI: 10.1021/acs.inorgchem.3c00751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
A cavity-shaped linear gold(I) hydroxide complex acts as a platform to access unusual gold monomeric species. Notably, this sterically crowded gold fragment enables the trapping of CO2 via insertion into Au-OH and Au-NH bonds to form unprecedented monomeric gold(I) carbonate and carbamate complexes. In addition, we succeeded in the identification of the first gold(I) terminal hydride bearing a phosphine ligand. The basic nature of the Au(I)-hydroxide moiety is also explored through the reactivity toward other molecules containing acidic protons such as trifluoromethanesulfonic acid and terminal alkynes.
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Affiliation(s)
- Miquel Navarro
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain
| | - Markus Holzapfel
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain
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Mandal D, Kumar A, Patil NT. Gold catalysis in organic synthesis: fifteen years of research in India. PROCEEDINGS OF THE INDIAN NATIONAL SCIENCE ACADEMY 2022. [DOI: 10.1007/s43538-022-00106-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Schmer A, Welideniya D, Terschüren T, Schnakenburg G, Daniels J, Bauza A, Frontera A, Streubel R. A homonuclear π-system with a singlet carbene-type α and a nucleophilic β phosphorus - the first use in P-heterocyclic synthesis. Dalton Trans 2021; 50:17892-17896. [PMID: 34813641 DOI: 10.1039/d1dt03350f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A μ2-(η1,η2)-dinuclear diphosphene complex having two W(CO)5 groups with dimethyl acetylenedicarboxylate, 4-phenyl-1,2,4-triazoline-3,5-dione and diethyl azodicarboxylate was applied to P-heterocyclic synthesis, i.e., using a singlet carbene-type reactivity of a homonuclear π-system assisted by a haptotropic shift thus rendering a more nucleophilic β phosphorus and, hence, a subsequent ring expansion.
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Affiliation(s)
- Alexander Schmer
- Institute for Inorganic Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany.
| | - Dhanushi Welideniya
- Institute for Inorganic Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany.
| | - Tatjana Terschüren
- Institute for Inorganic Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany.
| | - Gregor Schnakenburg
- Institute for Inorganic Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany.
| | - Jörg Daniels
- Institute for Inorganic Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany.
| | - Antonio Bauza
- Department of Chemistry, University of the Balearic Islands, Cra. de Valldemossa, 07122 Palma, Baleares, Spain
| | - Antonio Frontera
- Department of Chemistry, University of the Balearic Islands, Cra. de Valldemossa, 07122 Palma, Baleares, Spain
| | - Rainer Streubel
- Institute for Inorganic Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany.
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Siewert JE, Schumann A, Hering-Junghans C. Phosphine-catalysed reductive coupling of dihalophosphanes. Dalton Trans 2021; 50:15111-15117. [PMID: 34611690 DOI: 10.1039/d1dt03095g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Classically tetraaryl diphosphanes have been synthesized through Wurtz-type reductive coupling of halophosphanes R2PX or more recently, through the dehydrocoupling of phosphines R2PH. Catalytic variants of the dehydrocoupling reaction have been reported, but are limited to R2PH compounds. Using PEt3 as a catalyst, we now show that TipPBr2 (Tip = 2,4,6-iPr3C6H2) is selectively coupled to give the dibromodiphosphane (TipPBr)2 (1), a compound not accessible using classic Mg reduction. Surprisingly, when using DipPBr2 (Dip = 2,6-iPr3C6H3) in the PEt3 catalysed reductive coupling the diphosphene (PDip)2 (2) with a PP double was formed selectively. In benzene solutions (PDip)2 has a half life time of ca. 28 days and can be utilized with NHCs to access NHC-phosphinidene adducts. To show that this protocol is more widely applicable, we show that Ph2PCl and Mes2PX (X = Cl, Br) are efficiently coupled using 10 mol% of PEt3 to give (Ph2P)2 and (Mes2P)2, respectively. Control experiments show that [BrPEt3]Br is a potential oxidation product in the catalytic cycle, which can be debrominated by Zn dust as a sacrificial reductant.
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Affiliation(s)
- Jan-Erik Siewert
- Leibniz Institut für Katalyse e.V. (LIKAT), A.-Einstein-Str. 29a, 18059 Rostock, Germany.
| | - André Schumann
- Leibniz Institut für Katalyse e.V. (LIKAT), A.-Einstein-Str. 29a, 18059 Rostock, Germany.
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Dhara D, Pal PK, Dolai R, Chrysochos N, Rawat H, Elvers BJ, Krummenacher I, Braunschweig H, Schulzke C, Chandrasekhar V, Priyakumar UD, Jana A. Synthesis and reactivity of NHC-coordinated phosphinidene oxide. Chem Commun (Camb) 2021; 57:9546-9549. [PMID: 34546278 DOI: 10.1039/d1cc04421d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Here we report the synthesis of an N-heterocyclic carbene (NHC)-stabilised phosphinidene oxide by the controlled oxygenation of a phosphinidene under ambient conditions. This compound can be further oxygenated to a phosphinidene dioxide. The stoichiometric reduction of a phosphinidene oxide with KC8 resembles the pinacol coupling reaction-the reduction of a carbonyl compound. We also looked at the stoichiometric oxidation of NHC-coordinated phosphinidene, phosphinidene oxide and phosphinidene dioxide with [NO][SbF6].
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Affiliation(s)
- Debabrata Dhara
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India.
| | - Pradeep Kumar Pal
- International Institute of Information Technology, Gachibowli, Hyderabad-500032, India.
| | - Ramapada Dolai
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India.
| | - Nicolas Chrysochos
- Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Straße 4, Greifswald D-17489, Germany.
| | - Hemant Rawat
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India.
| | - Benedict J Elvers
- Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Straße 4, Greifswald D-17489, Germany.
| | - Ivo Krummenacher
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, Würzburg 97074, Germany.
| | - Holger Braunschweig
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, Würzburg 97074, Germany.
| | - Carola Schulzke
- Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Straße 4, Greifswald D-17489, Germany.
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India. .,Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - U Deva Priyakumar
- International Institute of Information Technology, Gachibowli, Hyderabad-500032, India.
| | - Anukul Jana
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India.
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Dhara D, Scheschkewitz D, Chandrasekhar V, Yildiz CB, Jana A. Reactivity of NHC/diphosphene-coordinated Au(I)-hydride. Chem Commun (Camb) 2021; 57:809-812. [PMID: 33367425 DOI: 10.1039/d0cc05461e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We report the reactivity of isolable Au(i)-hydride stabilized by an NHC-coordinated diphosphene towards substrates containing C-C and N-N multiple bonds (NHC = N-heterocyclcic carbene). Reactions with dimethyl acetylenedicarboxylate and azobenzene lead to a trans-addition of the Au(i)-H across the C-C triple bond and the N-N double bond, respectively. In contrast, the reaction with ethyl diazoacetate affords a gold(i)-hydrazonide as the 1,1-addition product to the terminal nitrogen atom. With phenyl acetylene, the corresponding Au(i)-alkynyl complex is obtained under the elimination of dihydrogen. Strikingly, diphosphene-containing Au(i)-hydride is more reactive - affording different products in some cases - than a related NHC-stabilized Au(i)-hydride without the mediating diphosphene moiety.
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Affiliation(s)
- Debabrata Dhara
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India.
| | - David Scheschkewitz
- Krupp-Chair of General and Inorganic Chemistry, Saarland University, 66123 Saarbrücken, Germany.
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India. and Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India.
| | - Cem B Yildiz
- Department of Medicinal and Aromatic Plants, University of Aksaray, Aksaray, Turkey.
| | - Anukul Jana
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India.
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Xiong XG, Liu H. Anion Photoelectron Spectroscopy and Theoretical Study of HAuCN and [HAuCN] -: Spin-Orbit Coupling and Low-Lying Excited States. J Phys Chem A 2020; 124:4712-4719. [PMID: 32407628 DOI: 10.1021/acs.jpca.0c01707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a study of the electronic structures and chemical bonding of gaseous [HAuCN]- and the corresponding neutral molecule using photoelectron spectroscopy and relativistic quantum chemistry calculations. The electron affinity of the neutral HAuCN is reported to be 4.75 eV for the first time. The low-lying excited states of neutral molecule are observed and assigned according to the calculations utilizing a sophisticated electron correlation method incorporating both the scalar and spin-orbit relativistic effects. Our theoretical calculations suggest the geometry will be distorted from linear structure to the bent during the process of detaching one electron from the anion. Various chemical bonding analyses based on theoretical calculations have been performed for the titled complexes, and the apparent covalent natures of interactions between gold and the studied ligands have been verified.
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Affiliation(s)
- Xiao-Gen Xiong
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
| | - Hongtao Liu
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
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Dhara D, Das S, Pati SK, Scheschkewitz D, Chandrasekhar V, Jana A. NHC-Coordinated Diphosphene-Stabilized Gold(I) Hydride and Its Reversible Conversion to Gold(I) Formate with CO 2. Angew Chem Int Ed Engl 2019; 58:15367-15371. [PMID: 31414524 PMCID: PMC6916326 DOI: 10.1002/anie.201909798] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Indexed: 01/05/2023]
Abstract
An NHC-coordinated diphosphene is employed as ligand for the synthesis of a hydrocarbon-soluble monomeric AuI hydride, which readily adds CO2 at room temperature yielding the corresponding AuI formate. The reversible reaction can be expedited by the addition of NHC, which induces β-hydride shift and the removal of CO2 from equilibrium through the formation of an NHC-CO2 adduct. The AuI formate is alternatively formed by dehydrogenative coupling of the AuI hydride with formic acid (HCO2 H), thus in total establishing a reaction sequence for the AuI hydride mediated dehydrogenation of HCO2 H as chemical hydrogen storage material.
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Affiliation(s)
- Debabrata Dhara
- Tata Institute of Fundamental Research Hyderabad, GopanpallyHyderabad-500107TelanganaIndia
| | - Shubhajit Das
- Theoretical Sciences UnitJawaharlal Nehru Centre for Advanced Scientific ResearchBangalore-560064India
- Present address: Laboratory for Computational Molecular Design Institute of Chemical Sciences and EngineeringEcole Polytechnique Federale de Lausanne (EPFL)1015LausanneSwitzerland
| | - Swapan K. Pati
- Theoretical Sciences UnitJawaharlal Nehru Centre for Advanced Scientific ResearchBangalore-560064India
| | - David Scheschkewitz
- Krupp-Chair of General and Inorganic ChemistrySaarland University66123SaarbrückenGermany
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research Hyderabad, GopanpallyHyderabad-500107TelanganaIndia
- Department of ChemistryIndian Institute of Technology KanpurKanpur-208016India
| | - Anukul Jana
- Tata Institute of Fundamental Research Hyderabad, GopanpallyHyderabad-500107TelanganaIndia
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