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Fang M, Chen YY, Shao LJ, Shi TX, Yu H, Li PF, Wu ZL, Wang WM. Structures, luminescent and magnetic properties of three dinuclear lanthanide complexes: Dysprosium compound displaying slow magnetic relaxation. Polyhedron 2019. [DOI: 10.1016/j.poly.2018.10.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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2
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Das S, Hossain S, Dey A, Biswas S, Pardo E, Lloret F, Chandrasekhar V. Heterometallic Pentanuclear [Ni
4
Ln] (Ln
III
= Gd, Tb, Dy, Ho) Complexes: Accidental Orthogonality Leading to Ferromagnetic Interactions. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402195] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sourav Das
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India, http://www.iitk.ac.in
| | - Sakiat Hossain
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India, http://www.iitk.ac.in
| | - Atanu Dey
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India, http://www.iitk.ac.in
- National Institute of Science Education and Research, Institute of Physics Campus, Sachivalaya Marg, P. O. Sainik School, Bhubaneswar 751005, India http://www.niser.ac.in
| | - Sourav Biswas
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India, http://www.iitk.ac.in
| | - Emilio Pardo
- Departament de Química Inorgànica, Instituto de Ciencia Molecular (ICMOL), Universitat de València, 46980 Paterna, València, Spain, http://www.icmol.es
| | - Francesc Lloret
- Departament de Química Inorgànica, Instituto de Ciencia Molecular (ICMOL), Universitat de València, 46980 Paterna, València, Spain, http://www.icmol.es
| | - Vadapalli Chandrasekhar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India, http://www.iitk.ac.in
- National Institute of Science Education and Research, Institute of Physics Campus, Sachivalaya Marg, P. O. Sainik School, Bhubaneswar 751005, India http://www.niser.ac.in
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Jiang GQ, Li SJ, Zhang YQ, Zhang QJ. Structure and magnetic properties of A Cu(II) coordination polymer supported by a tetrapodal Schiff base ligand. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2013.12.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Chandrasekhar V, Das S, Dey A, Hossain S, Kundu S, Colacio E. Linear, Edge-Sharing Heterometallic Trinuclear [CoII-LnIII-CoII] (LnIII= GdIII, DyIII, TbIII, and HoIII) Complexes: Slow Relaxation of Magnetization in the DyIIIDerivative. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201301171] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Chandrasekhar V, Das S, Dey A, Hossain S, Lloret F, Pardo E. Synthesis, Structure, and Magnetic Properties of a Family of Heterometallic Pentanuclear [Co
4
Ln] (Ln = Gd
III
, Dy
III
, Tb
III
, and Ho
III
) Assemblies. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300413] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Vadapalli Chandrasekhar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India, http://www.iitk.ac.in
- Tata Institute of Fundamental Research, Centre for Interdisciplinary Sciences, 21 Brundavan Colony, Narsingi, Hyderabad 500075, India, http://www.tifrh.res.in
| | - Sourav Das
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India, http://www.iitk.ac.in
| | - Atanu Dey
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India, http://www.iitk.ac.in
| | - Sakiat Hossain
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India, http://www.iitk.ac.in
| | - Francesc Lloret
- Departament de Química Inorgànica, Instituto de Ciencia Molecular (ICMOL), Universitat de València, 46980 Paterna, València, Spain
| | - Emilio Pardo
- Departament de Química Inorgànica, Instituto de Ciencia Molecular (ICMOL), Universitat de València, 46980 Paterna, València, Spain
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Chandrasekhar V, Bag P, Murugesapandian B, Pandey MD. A phosphorus-based compartmental ligand, (S)P[N(Me)NCH–C6H3-2-O-3-OMe]3 (LH3), enables the assembly of luminescent heterobimetallic linear {L2Zn2Ln}+ [Ln = Gd, Tb, Nd and Eu] complexes. Dalton Trans 2013; 42:15447-56. [DOI: 10.1039/c3dt51431e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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7
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Azhakar R, Roesky HW, Wolf H, Stalke D. Reactivity of Stable Heteroleptic Silylene PhC(NtBu)2SiNPh2 toward Diazobenzene and N-Benzylidineaniline. Organometallics 2012. [DOI: 10.1021/om300999e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ramachandran Azhakar
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse
4, 37077 Göttingen, Germany
| | - Herbert W. Roesky
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse
4, 37077 Göttingen, Germany
| | - Hilke Wolf
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse
4, 37077 Göttingen, Germany
| | - Dietmar Stalke
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse
4, 37077 Göttingen, Germany
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Wu BD, Zhang JG, Zhang TL, Yang L, Zhou ZN. Two Environmentally Friendly Energetic Compounds, [Mn(AZT)4(H2O)2](PA)2·4H2O and [Co(AZT)2(H2O)4](PA)2, Based on 3-Azido-1,2,4-triazole (AZT) and Picrate (PA). Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201100806] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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9
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Chandrasekhar V, Pandey MD, Das B, Mahanti B, Gopal K, Azhakar R. Synthesis, structure and photo-physical properties of phosphorus-supported fluorescent probes. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.06.073] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Chandrasekhar V, Senapati T, Dey A, Hossain S. Molecular transition-metal phosphonates. Dalton Trans 2011; 40:5394-418. [DOI: 10.1039/c0dt01069c] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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11
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Chandrasekhar V, Pandey MD, Gopal K, Azhakar R. Assembly of a dinuclear silver complex containing an Ag2S2 motif from a phosphorus-supported trishydrazone ligand. PS→AgI coordination. Dalton Trans 2011; 40:7873-8. [DOI: 10.1039/c1dt10294j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Dutta S, Biswas P, Flörke U, Nag K. Structure, Stereochemistry, and Physico-Chemical Properties of Trinuclear and Dinuclear Metal(II) Complexes of a Phenol-Based Tetrapodal Schiff Base Ligand. Inorg Chem 2010; 49:7382-400. [DOI: 10.1021/ic100666t] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Supriya Dutta
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata −700032, India
| | - Papu Biswas
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata −700032, India
- Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah −711103, India
| | - Ulrich Flörke
- Department of Inorganic and Analytical Chemistry, Paderborn University, D-33098, Paderborn, Germany
| | - Kamalaksha Nag
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata −700032, India
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Chandrasekhar V, Azhakar R, Murugesapandian B, Senapati T, Bag P, Pandey MD, Maurya SK, Goswami D. Synthesis, Structure, and Two-Photon Absorption Studies of a Phosphorus-Based Tris Hydrazone Ligand (S)P[N(Me)N═CH-C6H3-2-OH-4-N(CH2CH3)2]3 and Its Metal Complexes. Inorg Chem 2010; 49:4008-16. [DOI: 10.1021/ic901531e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
| | - Ramachandran Azhakar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | | | - Tapas Senapati
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Prasenjit Bag
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Mrituanjay D. Pandey
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Sandeep Kumar Maurya
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Debabrata Goswami
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
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Zhao XQ, Lan Y, Zhao B, Cheng P, Anson CE, Powell AK. Synthesis, structures and magnetic properties of a series of 3d-4f tetranuclear CoII2LnIII2 cubanes. Dalton Trans 2010; 39:4911-7. [DOI: 10.1039/c002841j] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chandrasekhar V, Murugesapandian B. Phosphorus-supported ligands for the assembly of multimetal architectures. Acc Chem Res 2009; 42:1047-62. [PMID: 19453168 DOI: 10.1021/ar800221e] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Modeled after boron-based scorpionate ligands, acyclic and cyclic phosphorus-containing compounds possessing reactive groups can serve as excellent precursors for the assembly of novel phosphorus-supported ligands that can coordinate multiple sites. In such ligands, the phosphorus atom does not have any role in coordination but is used as a structural support to assemble one or more coordination platforms. In this Account, we describe the utility of inorganic heterocyclic rings such as cyclophosphazenes and carbophosphazenes as well as acyclic phosphorus-containing compounds such as (S)PCl(3), RP(O)Cl(2), and R(2)P(O)Cl for building such multisite coordination platforms. We can modulate the number and orientation of such coordination platforms through the choice of the phosphorus-containing precursor. This methodology is quite general and modular and allows the creation of well-defined libraries of multisite coordination ligands. Phosphorus-supported pyrazolyl ligands are quite useful for building multimetallic architectures. Some of these ligands are prone to P-N bond hydrolysis upon metalation, but we have exploited the P-N bond sensitivity to generate hydrolyzed ligands in situ, which are useful to build multimetal assemblies. In addition, the intimate relationship between small molecule cyclophosphazenes and the corresponding pendant cyclophosphazene-containing polymer systems facilitated our design of polymer-supported catalysts for phosphate ester hydrolysis, plasmid DNA modification, and C-C bond formation reactions. Phosphorus hydrazides containing reactive amine groups are ideal precursors for integration into more complex ligand systems. The ligand (S)P[N(Me)N=CH-C(6)H(4)-2-OH](3) (LH(3)) contains six coordination sites, and its coordination response depends upon the oxidation state of the metal ion employed. LH(3) reacts with divalent transition metal ions to afford neutral trimetallic derivatives L(2)M(3), where the three metal ions are arranged in a perfectly linear manner in many cases. Incorporating an additional methoxy group into LH(3) affords the ligand (S)P[N(Me)N=CH-C(6)H(3)-2-OH-3-OMe](3) (L'H(3)), which contains nine coordination sites: three imino nitrogen atoms, three phenolate oxygen atoms, and three methoxy oxygen atoms. The reaction of L'H(3) with transition metal salts in 1:1 ratio leads to the in situ formation of a metalloligand (L'M), which on further treatment with lanthanide salts gives heterobimetallic trinuclear cationic complexes [L'(2)M(2)Ln](+) containing a M-Ln-M linear array (M = transition metal ion in a +2 oxidation state). Many of these 3d-4f compounds behave as single-molecule magnets at low temperatures. Although challenges remain in the development of synthetic methods and in the architectural control of the coordination platforms, we see opportunities for further research into coordination platforms supported by main group elements such as phosphorus. As we have shown in this Account, one potential disadvantage, sensitivity of P-N bonds to hydrolysis, can be used successfully to build larger assemblies.
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Chandrasekhar V, Pandian BM, Vittal JJ, Clérac R. Synthesis, Structure, and Magnetism of Heterobimetallic Trinuclear Complexes {[L2Co2Ln][X]} [Ln = Eu, X = Cl; Ln = Tb, Dy, Ho, X = NO3; LH3 = (S)P[N(Me)N═CH−C6H3-2-OH-3-OMe]3]: A 3d−4f Family of Single-Molecule Magnets. Inorg Chem 2009; 48:1148-57. [DOI: 10.1021/ic801905p] [Citation(s) in RCA: 169] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vadapalli Chandrasekhar
- Department of Chemistry, Indian Institute of Technology—Kanpur, Kanpur-208016, India, Department of Chemistry, National University of Singapore, Singapore, CNRS, UPR 8641, Centre de Recherche Paul Pascal (CRPP), Equipe “Matériaux Moléculaires Magnétiques”, 115 avenue du Dr. Albert Schweitzer, Pessac, F-33600, France, and Université de Bordeaux, UPR 8641, Pessac, F-33600, France
| | - Balasubramanian Murugesa Pandian
- Department of Chemistry, Indian Institute of Technology—Kanpur, Kanpur-208016, India, Department of Chemistry, National University of Singapore, Singapore, CNRS, UPR 8641, Centre de Recherche Paul Pascal (CRPP), Equipe “Matériaux Moléculaires Magnétiques”, 115 avenue du Dr. Albert Schweitzer, Pessac, F-33600, France, and Université de Bordeaux, UPR 8641, Pessac, F-33600, France
| | - Jagadese J. Vittal
- Department of Chemistry, Indian Institute of Technology—Kanpur, Kanpur-208016, India, Department of Chemistry, National University of Singapore, Singapore, CNRS, UPR 8641, Centre de Recherche Paul Pascal (CRPP), Equipe “Matériaux Moléculaires Magnétiques”, 115 avenue du Dr. Albert Schweitzer, Pessac, F-33600, France, and Université de Bordeaux, UPR 8641, Pessac, F-33600, France
| | - Rodolphe Clérac
- Department of Chemistry, Indian Institute of Technology—Kanpur, Kanpur-208016, India, Department of Chemistry, National University of Singapore, Singapore, CNRS, UPR 8641, Centre de Recherche Paul Pascal (CRPP), Equipe “Matériaux Moléculaires Magnétiques”, 115 avenue du Dr. Albert Schweitzer, Pessac, F-33600, France, and Université de Bordeaux, UPR 8641, Pessac, F-33600, France
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Chandrasekhar V, Azhakar R, Pandian BM, Boomishankar R, Steiner A. A phosphorus-supported multisite coordination ligand containing three imidazolyl arms and its metalation behaviour. An unprecedented co-existence of mononuclear and macrocyclic dinuclear Zn(ii) complexes in the same unit cell of a crystalline lattice. Dalton Trans 2008:5962-9. [DOI: 10.1039/b807074a] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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