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Dhiman M, Polshettiwar V. Supported Single Atom and Pseudo-Single Atom of Metals as Sustainable Heterogeneous Nanocatalysts. ChemCatChem 2018. [DOI: 10.1002/cctc.201701431] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Mahak Dhiman
- Nanocatalysis Laboratory (NanoCat), Department of Chemical Sciences; Tata Institute of Fundamental Research (TIFR); Mumbai 400005 India
| | - Vivek Polshettiwar
- Nanocatalysis Laboratory (NanoCat), Department of Chemical Sciences; Tata Institute of Fundamental Research (TIFR); Mumbai 400005 India
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Mondal KC, Mereacre V, Kostakis GE, Lan Y, Anson CE, Prisecaru I, Waldmann O, Powell AK. A Strongly Spin-Frustrated Fe(III) 7 Complex with a Canted Intermediate Spin Ground State of S=7/2 or 9/2. Chemistry 2015; 21:10835-42. [PMID: 26073059 DOI: 10.1002/chem.201500841] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Indexed: 11/08/2022]
Abstract
A disk-shaped [Fe(III) 7 (Cl)(MeOH)6 (μ3 -O)3 (μ-OMe)6 (PhCO2 )6 ]Cl2 complex with C3 symmetry has been synthesised and characterised. The central tetrahedral Fe(III) is 0.733 Å above the almost co-planar Fe(III) 6 wheel, to which it is connected through three μ3 -oxide bridges. For this iron-oxo core, the magnetic susceptibility analysis proposed a Heisenberg-Dirac-van Vleck (HDvV) mechanism that leads to an intermediate spin ground state of S=7/2 or 9/2. Within either of these ground state manifolds it is reasonable to expect spin frustration effects. The (57) Fe Mössbauer (MS) analysis verifies that the central Fe(III) ion easily aligns its magnetic moment antiparallel to the externally applied field direction, whereas the other six peripheral Fe(III) ions keep their moments almost perpendicular to the field at stronger fields. This unusual canted spin structure reflects spin frustration. The small linewidths in the magnetic Mössbauer spectra of polycrystalline samples clearly suggest an isotropic exchange mechanism for realisation of this peculiar spin topology.
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Affiliation(s)
- Kartik Chandra Mondal
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie, Engesserstr. 15, 76131 Karslruhe (Germany)
| | - Valeriu Mereacre
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie, Engesserstr. 15, 76131 Karslruhe (Germany)
| | - George E Kostakis
- Institut für Nanotechnologie, Karlsruher Institut für Technologie, Herrmann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany)
| | - Yanhua Lan
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie, Engesserstr. 15, 76131 Karslruhe (Germany)
| | - Christopher E Anson
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie, Engesserstr. 15, 76131 Karslruhe (Germany)
| | - Ion Prisecaru
- WMOSS.ORG, Max-Beckmann-Str. 29, 76227, Karlsruhe (Germany).
| | - Oliver Waldmann
- Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg (Germany).
| | - Annie K Powell
- Institut für Anorganische Chemie, Karlsruher Institut für Technologie, Engesserstr. 15, 76131 Karslruhe (Germany). .,Institut für Nanotechnologie, Karlsruher Institut für Technologie, Herrmann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany).
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Villalba Franco JM, Schnakenburg G, Sasamori T, Espinosa Ferao A, Streubel R. Stimuli-Responsive Frustrated Lewis-Pair-Type Reactivity of a Tungsten Iminoazaphosphiridine Complex. Chemistry 2015; 21:9650-5. [PMID: 26031623 DOI: 10.1002/chem.201501628] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Indexed: 11/09/2022]
Affiliation(s)
- José Manuel Villalba Franco
- Institut für Anorganische Chemie, Reinischen Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn (Germany), Fax:(+49) 228-739616
| | - Gregor Schnakenburg
- Institut für Anorganische Chemie, Reinischen Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn (Germany), Fax:(+49) 228-739616
| | - Takahiro Sasamori
- Institut for Chemical Research, Kyoto University, Gokasho Uji, Kyoto, 611-0011 (Japan)
| | - Arturo Espinosa Ferao
- Departamento de Química Orgánica, Universidad de Murcia, Campus de Espinardo, 30100 Murcia (Spain), Fax:(+34) 868-884149.
| | - Rainer Streubel
- Institut für Anorganische Chemie, Reinischen Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn (Germany), Fax:(+49) 228-739616.
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Vaz MGF, Cassaro RAA, Akpinar H, Schlueter JA, Lahti PM, Novak MA. A Cobalt Pyrenylnitronylnitroxide Single-Chain Magnet with High Coercivity and Record Blocking Temperature. Chemistry 2014; 20:5460-7. [DOI: 10.1002/chem.201304852] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Indexed: 11/05/2022]
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Adhikary A, Jena HS, Khatua S, Konar S. Synthesis and Characterization of Two Discrete Ln10Nanoscopic Ladder-Type Cages: Magnetic Studies Reveal a Significant Cryogenic Magnetocaloric Effect and Slow Magnetic Relaxation. Chem Asian J 2014; 9:1083-90. [DOI: 10.1002/asia.201301619] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Indexed: 11/07/2022]
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Mukherjee S, Mukherjee PS. Role of dicarboxylate linkers in Mn(III)-salicylaldoximate based extended structures: synthesis, structures, and magnetic behavior. Chemistry 2013; 19:17064-74. [PMID: 24307365 DOI: 10.1002/chem.201302377] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Indexed: 11/07/2022]
Abstract
Four new oxo-centered Mn(III)-salicylaldoximate triangle-based extended complexes [Mn(III)6O2(salox)6(EtOH)4(phda)]n·(saloxH2)n·(2H2O)n (1), [Mn(III)6O2(salox)6(MeOH)5(5-I-isoph)]n·(3MeOH)n (2), [Mn(III)6O2(salox)6(MeOH)4(H2O) (5-N3-isoph)]n·(4MeOH)n (3) and [Mn(III)3NaO(salox)3(MeOH)4(5-NO2-isoph)]n·(MeOH)n (H2O)n (4) [salox=salicylaldoximate, phda=1,3-phenylenediacetate, isoph=isophthalate] have been synthesized under similar reaction conditions. Single crystal X-ray structures show that in 1, only one type of Mn6 cluster is arranged in 1D, whereas in 2 and 3 there are two types of clusters, differing in the way the triangle units are joined and assembled. In complex 4, however, the basic building structure is heteronuclear and based on Mn3 units extended in 2D. Susceptibility measurements (dc and ac) over a wide range of temperatures and fields show that the complexes 1, 2, and 3 behave as single molecule magnets (SMMs) with S=4 ground state, while 4 is dominantly antiferromagnetic with a ground spin state S=2. Density functional theory calculations have been performed on model complexes to provide a qualitative theoretical interpretation for their overall magnetic behavior.
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Affiliation(s)
- Sandip Mukherjee
- Department of Inorganic & Physical Chemistry, Indian Institution of Science, Bangalore 560 012 (India), Fax: (+91) 8023601552
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Liu J, Lin W, Chen Y, Gómez‐Coca S, Aravena D, Ruiz E, Leng J, Tong M. Cu
II
Gd
III
Cryogenic Magnetic Refrigerants and Cu
8
Dy
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Single‐Molecule Magnet Generated by In Situ Reactions of Picolinaldehyde and Acetylpyridine: Experimental and Theoretical Study. Chemistry 2013; 19:17567-77. [DOI: 10.1002/chem.201303275] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Jun‐Liang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, State Key Laboratory of Optoelectronic, Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat‐Sen University, Guangzhou 510275 (P.R. China)
| | - Wei‐Quan Lin
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, State Key Laboratory of Optoelectronic, Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat‐Sen University, Guangzhou 510275 (P.R. China)
| | - Yan‐Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, State Key Laboratory of Optoelectronic, Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat‐Sen University, Guangzhou 510275 (P.R. China)
| | - Silvia Gómez‐Coca
- Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona (Spain)
| | - Daniel Aravena
- Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona (Spain)
| | - Eliseo Ruiz
- Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona (Spain)
| | - Ji‐Dong Leng
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, State Key Laboratory of Optoelectronic, Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat‐Sen University, Guangzhou 510275 (P.R. China)
| | - Ming‐Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, State Key Laboratory of Optoelectronic, Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat‐Sen University, Guangzhou 510275 (P.R. China)
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Guo FS, Chen YC, Mao LL, Lin WQ, Leng JD, Tarasenko R, Orendáč M, Prokleška J, Sechovský V, Tong ML. Anion-Templated Assembly and Magnetocaloric Properties of a Nanoscale {Gd38} Cage versus a {Gd48} Barrel. Chemistry 2013; 19:14876-85. [DOI: 10.1002/chem.201302093] [Citation(s) in RCA: 136] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Indexed: 11/12/2022]
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Milway VA, Tuna F, Farrell AR, Sharp LE, Parsons S, Murrie M. Directed synthesis of {Mn18Cu6} heterometallic complexes. Angew Chem Int Ed Engl 2013; 52:1949-52. [PMID: 23307272 PMCID: PMC3601430 DOI: 10.1002/anie.201208781] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 12/11/2012] [Indexed: 11/19/2022]
Affiliation(s)
- Victoria A Milway
- WestCHEM, School of Chemistry, University of GlasgowGlasgow G12 8QQ (UK)
| | - Floriana Tuna
- EPSRC National UK EPR Facility, School of Chemistry and Photon Science Institute, The University of ManchesterManchester M13 9PL (UK)
| | - Andrew R Farrell
- WestCHEM, School of Chemistry, University of GlasgowGlasgow G12 8QQ (UK)
| | - Laura E Sharp
- WestCHEM, School of Chemistry, University of GlasgowGlasgow G12 8QQ (UK)
| | - Simon Parsons
- EaStCHEM School of Chemistry, The University of EdinburghEdinburgh, EH9 3JJ (UK)
| | - Mark Murrie
- WestCHEM, School of Chemistry, University of GlasgowGlasgow G12 8QQ (UK)
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Milway VA, Tuna F, Farrell AR, Sharp LE, Parsons S, Murrie M. Directed Synthesis of {Mn18
Cu6
} Heterometallic Complexes. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201208781] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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