1
|
Majumdar D, Das S, Thomas R, Ullah Z, Sreejith S, Das D, Shukla P, Bankura K, Mishra D. Syntheses, X-ray crystal structures of two new Zn(II)-dicyanamide complexes derived from H2vanen-type compartmental ligands: Investigation of thermal, photoluminescence, in vitro cytotoxic effect and DFT-TDDFT studies. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.04.041] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
2
|
Majumdar D, Das D, Sreejith S, Das S, Kumar Biswas J, Mondal M, Ghosh D, Bankura K, Mishra D. Dicyanamide-interlaced assembly of Zn(II)-schiff-base complexes derived from salicylaldimino type compartmental ligands: Syntheses, crystal structures, FMO, ESP, TD-DFT, fluorescence lifetime, in vitro antibacterial and anti-biofilm properties. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.02.022] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
3
|
Manson JL, Brown CM, Huang Q, Schlueter JA, Lancaster T, Blundell SJ, Singleton J, Lynn JW, Pratt FL. Mn(dca)2(o-phen) {dca=dicyanamide; o-phen=1,10-phenanthroline}: Long-range magnetic order in a low-dimensional Mn-dca polymer. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.07.087] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
4
|
Maiti M, Sadhukhan D, Thakurta S, Roy S, Pilet G, Butcher RJ, Nonat A, Charbonnière LJ, Mitra S. Series of Dicyanamide-Interlaced Assembly of Zinc-Schiff-Base Complexes: Crystal Structure and Photophysical and Thermal Studies. Inorg Chem 2012; 51:12176-87. [DOI: 10.1021/ic3012958] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Monami Maiti
- Department
of Chemistry, Jadavpur University, Raja
S. C. Mullick Road, Kolkata
700032, West Bengal, India
| | - Dipali Sadhukhan
- Department
of Chemistry, Jadavpur University, Raja
S. C. Mullick Road, Kolkata
700032, West Bengal, India
| | - Santarupa Thakurta
- Department
of Chemistry, Jadavpur University, Raja
S. C. Mullick Road, Kolkata
700032, West Bengal, India
| | - Syamantak Roy
- Department
of Chemistry, Jadavpur University, Raja
S. C. Mullick Road, Kolkata
700032, West Bengal, India
| | - Guillaume Pilet
- Groupe de Crystallographie et
Ingénierie Moléculaire, Laboratoire des Multimatériaux
et Interfaces, UMR 5615 CNRS-Université Claude Bernard Lyon 1, Bât. Chevreul, 43 bd du 11 Novembre
1918, 69622 Villeurbanne Cedex, France
| | - Ray J. Butcher
- Department of Chemistry, Howard University, 2400 Sixth Street NW, Washington,
DC 20059, United States
| | - Aline Nonat
- Laboratoire d’Ingénierie
Moléculaire Appliquée à l’Analyse, IPHC, UMR 7178 CNRS/UdS, ECPM Bât R1N0, 25 rue Becquerel,
67087 Strasbourg Cedex 2, France
| | - Loïc J. Charbonnière
- Laboratoire d’Ingénierie
Moléculaire Appliquée à l’Analyse, IPHC, UMR 7178 CNRS/UdS, ECPM Bât R1N0, 25 rue Becquerel,
67087 Strasbourg Cedex 2, France
| | - Samiran Mitra
- Department
of Chemistry, Jadavpur University, Raja
S. C. Mullick Road, Kolkata
700032, West Bengal, India
| |
Collapse
|
5
|
Mohamadou A, Moreau J, Dupont L, Wenger E. Equilibrium and structural studies of copper(II) complexes with a tridentate ligand containing amide, pyrazyl and pyridyl nitrogen donors: Effect of anions coligands on crystal structures of copper(II) complexes. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.11.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
6
|
Turner DR, Chesman ASR, Murray KS, Deacon GB, Batten SR. The chemistry and complexes of small cyano anions. Chem Commun (Camb) 2011; 47:10189-210. [PMID: 21773626 DOI: 10.1039/c1cc11909e] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- David R Turner
- School of Chemistry, Monash University, Clayton, Vic 3800, Australia.
| | | | | | | | | |
Collapse
|
7
|
Spin fluctuations and orbital ordering in quasi-one-dimensional α-Cu(dca)2(pyz) {dca=dicyanamide=N(CN)2−; pyz=pyrazine}, a molecular analogue of KCuF3. Polyhedron 2010. [DOI: 10.1016/j.poly.2009.06.063] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
8
|
Manson JL, Schlueter JA, Nygren CL. Mn(dca)2(pym)2 and Mn(dca)2(pym)(H2O) {dca = dicyanamide; pym = pyrimidine}: New coordination polymers exhibiting 1- and 2-D topologies. Dalton Trans 2007:646-52. [PMID: 17268597 DOI: 10.1039/b612474g] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new coordination polymers comprised of Mn(2+), N(CN)(2)(-) (dicyanamide, herein denoted dca) and pyrimidine (pym) have been synthesized and structurally and magnetically characterized. Mn(dca)(2)(pym)(2), , crystallizes in the orthorhombic space group Pbcn and forms trans bi-bridged Mn-(micro(1,5)-dca)(2)-Mn ribbons that extend along the b-axis of the unit cell. Two terminally bonded pym ligands are trans-coordinated to the Mn center. Adjacent chains interdigitate in an undulating fashion presumably due to a templating effect imposed by the pym ligands where N-atoms of consecutive pym rings stack parallel to the chain axis. Mn(dca)(2)(pym)(H(2)O), , which crystallizes in the monoclinic space group P2(1)/c, has a unique interdigitated 2D network that consists of double-bridged [Mn(2)(dca)(2)(pym)(2)(H(2)O)(2)](2+)"dimers" that are connected via single-bridging dca ligands. Each MnN(5)O octahedron is comprised of a coordinated H(2)O, a monodentate pym ligand, and four micro(1,5)-bridging dca anions. The magnetic data for were fitted to a uniform antiferromagnetic chain model which yielded J/k(B) = -0.34(1) K. In contrast, is best described as an alternating chain owing to the presence of both single- and double-bridging dca anions; a least-squares fit afforded J(a) = -0.43(1) and J(b) = -0.20(2) K, respectively. A transition to long-range magnetic ordering was observed for below approximately 2.4 K in addition to a field-induced spin flop transition at 15.6 kOe (1.7 K).
Collapse
Affiliation(s)
- Jamie L Manson
- Condensed Matter Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
| | | | | |
Collapse
|
9
|
Tonzing DS, Batten SR, Murray KS. 1D chain structures of M(dca)2(phen)(H2O)·MeOH, M=Mn, Fe, Co, Ni, Zn, Cd, dca=dicyanamide, N(CN)2−, phen=4,7-phenanthroline. J Mol Struct 2006. [DOI: 10.1016/j.molstruc.2006.03.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
10
|
Armentano D, De Munno G, Guerra F, Julve M, Lloret F. Ligand Effects on the Structures of Extended Networks of Dicyanamide-Containing Transition-Metal Ions. Inorg Chem 2006; 45:4626-36. [PMID: 16749825 DOI: 10.1021/ic060044u] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The structural characterization of a series of complexes of formula [M(dca)2L]n, where dca = dicyanamide, L = 1,10-phenanthroline (phen) [1-4] and 2,9-dimethylphenanthroline (2,9-dmphen) [9-12], and M = Mn (1 and 9), Fe (2 and 10), Co (3 and 11), and Ni (4 and 12), has revealed the effect of the presence of the methyl substituents of L on the resulting network. The structure of [Mn(dca)2(phen)]n (1), which is identical to those of 2-4, together with the investigation of its magnetic properties in the temperature range of 77-300 K were reported elsewhere. The use of the 4,7-dimethylphenanthroline (4,7-dmphen) as the co-ligand yielded a series of compounds of formula [M(dca)2(4,7-dmphen)]n [M = Mn (5), Fe (6), Co (7), and Ni (8)], which are isostructural with 1-4. Compounds containing phen (1-4) and 4,7-dmphen (5-8) are made of two-dimensional grids of metal atoms, each metal atom being linked to three other metal centers through single (three metal atoms involved) and double (two metal atoms involved) dca bridges exhibiting the mu-1,5 coordination mode. The isostructural complexes [M(dca)2(2,9-dmphen)]n (9-12) also have a sheetlike structure, the metal atoms in each layer being linked by two single and one double mu-1,5-dca units, as in 1-8. However, the topology of the network in 9-12 is different from that in 1-8 because of the different arrangement of the two single mu-1,5 dca bridges: cis in 1-8 versus trans in 9-12. The magnetic study of compounds 1-12 in the temperature range of 1.9-290 K has revealed the occurrence of weak ferromagnetic (M = Ni) and antiferromagnetic interactions (M = Mn, Fe, and Co). The different magnetic behavior in 1-12 was analyzed in the light of their structures, and the values of the magnetic interactions were compared to those of related systems.
Collapse
Affiliation(s)
- Donatella Armentano
- Dipartimento di Chimica, Università della Calabria, via P. Bucci 14/c, 87036 Arcavacata di Rende, Cosenza, Italy
| | | | | | | | | |
Collapse
|
11
|
Benzotriazole based 1-D, 2-D and 3-D metal dicyanamide and tricyanomethanide coordination networks. Polyhedron 2006. [DOI: 10.1016/j.poly.2005.08.005] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
12
|
Wu AQ, Zheng FK, Chen WT, Cai LZ, Guo GC, Huang JS, Dong ZC, Takano Y. Two Series of Novel Rare Earth Complexes with Dicyanamide [Ln(dca)2(phen)2(H2O)3][dca]·(phen), (Ln = Pr, Gd, and Sm) and [Ln(dca)3(2,2‘-bipy)2(H2O)]n, (Ln = Gd, Sm, and La): Syntheses, Crystal Structures, and Magnetic Properties. Inorg Chem 2004; 43:4839-45. [PMID: 15285658 DOI: 10.1021/ic035470j] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two series of novel complexes, [Ln(dca)(2)(Phen)(2)(H(2)O)(3)](dca).(phen) (Ln = Pr (1), Gd (2), and Sm (3), dca = N(CN)(-), phen = 1,10-phenanthroline) and [Ln(dca)(3)(2,2'-bipy)(2)(H(2)O)](n), (Ln = Gd (4), Sm (5), and La (6), 2,2'-bipy = 2,2'-bipydine), have been synthesized and structurally characterized by X-ray crystallography. The crystal structures of the first series (1-3) are isomorphous and consist of discrete [Ln(dca)(2)(Phen)(2)(H(2)O)(3)]+ cations, dca anions, and lattice phen molecules; whereas the structures of the second series (4-6) are characterized by infinite chains [Ln(dca)(3)(2,2'-bipy)(2)(H(2)O)](n). The Ln(III) atoms in all complexes are nine-coordinated and form a distorted tricapped trigonal prism environment. The three-dimensional frameworks of 1-6 are constructed by intermolecular hydrogen bond interactions. Variable-temperature magnetic susceptibility measurements for complexes 1, 2, 4, and 5 indicate a Curie-Weiss paramagnetic behavior over 5-300 K.
Collapse
Affiliation(s)
- A-Qing Wu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China
| | | | | | | | | | | | | | | |
Collapse
|
13
|
Batten SR, Murray KS. Structure and magnetism of coordination polymers containing dicyanamide and tricyanomethanide. Coord Chem Rev 2003. [DOI: 10.1016/s0010-8545(03)00119-x] [Citation(s) in RCA: 933] [Impact Index Per Article: 44.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
14
|
Manson JL, Gu J, Schlueter JA, Wang HH. Structures and magnetic behavior of 1-, 2-, and 3D coordination polymers in the Cu(II)-dicyanamide-pyrimidine family. Inorg Chem 2003; 42:3950-5. [PMID: 12793834 DOI: 10.1021/ic026164t] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Using aqueous conditions, three new coordination polymers containing Cu(2+) cations, dicyanamide (dca) anions, and pyrimidine (pym) were isolated and structurally and magnetically characterized. Comprising the bulk of the product yield, Cu(dca)(2)(pym)(2), 1, crystallizes in the monoclinic space group P2(1)/c with a = 7.3569(5) A, b = 13.4482(9) A, c = 7.4559(5) A, beta = 98.984(3) degrees, and V = 728.6(1) A and forms linear 1D chains. The second compound, Cu(dca)(NO(3))(pym)(H(2)O), 2, is also monoclinic, P2(1)/n, with a = 7.6475(3) A, b = 12.2422(5) A, c = 11.0286(4) A, beta = 106.585(2) degrees, and V = 989.6(1) A(3). A 2D network structure consisting of both bridging mu-dca and pym ligands is formed while the NO(3)(-) and H(2)O are axially bonded to the Cu center. Cu(3)(dca)(6)(pym)(2).0.75H(2)O, 3, is triclinic, Ponemacr;, with a = 7.7439(4) A, b = 9.3388(5) A, c = 10.1779(5) A, alpha = 86.014(2) degrees, beta = 88.505(2) degrees, gamma = 73.623(2) degrees, and V = 704.46(9) A(3). The structure of 3 is quite unique in that [Cu(3)(pym)(2)](6+) trimers are interconnected via mu-dca ligands affording a complex 3D self-penetrating framework. Magnetically, 1 exhibits extremely weak exchange interactions along the Cu-(dca)(2)-Cu ribbons while 2 and 3 display very strong magnetic couplings mediated by the mu-bonded pym ligands. Moreover, 2 shows a broad maximum in chi(T) at 40 K and behaves as a uniform 1D antiferromagnetic chain with g = 2.09(1), J/k(B) = -42.6(1) K, and TIP = -66 x 10(-)(6) emu/mol. An S = (1)/(2) trimer model that includes intertrimer interactions successfully described the magnetic behavior of 3, yielding g = 2.10(1), J/k(B) = -69.4(5) K, theta = -0.28(3) K, and TIP = -180 x 10(-)(6) emu/mol. It is found that mu-bonded dca and pym ligands mediate very weak and very strong exchange interactions, respectively, between Cu(2+) centers.
Collapse
Affiliation(s)
- Jamie L Manson
- Materials Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA.
| | | | | | | |
Collapse
|
15
|
Paraschiv C, Sutter JP, Schmidtmann M, Müller A, Andruh M. [Mn(MAC){μ1,5-N(CN)2}](PF6): a new one-dimensional coordination polymer with μ1,5-dicyanamido bridges (MAC=pentaaza macrocyclic ligand)—synthesis, crystal structure and magnetic properties. Polyhedron 2003. [DOI: 10.1016/s0277-5387(03)00283-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
16
|
Martín S, Barandika MG, Ezpeleta JM, Cortés R, Larramendi JIRD, Lezama L, Rojo T. Structural analysis and magnetic properties of the 1D [Fe(dca)2bipy(H2O)]·1/2H2O and the 3D [Ni(dca)2bipy] (dca = dicyanamide; bipy = 4,4′-bipyridine). ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b206069h] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
17
|
Jensen P, Batten SR, Moubaraki B, Murray KS. Syntheses, crystal structures, and magnetic properties of first row transition metal coordination polymers containing dicyanamide and 4,4′-bipyridine. ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b205007b] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
18
|
Synthesis, Structural Isomerism, and Magnetism of the Coordination Polymers [M(dca)2pyz], M=Mn, Fe, Co, Ni and Zn, dca=Dicyanamide (N(CN) −2), and pyz=Pyrazine. J SOLID STATE CHEM 2001. [DOI: 10.1006/jssc.2001.9164] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
19
|
Abstract
Magnets synthesized from molecules have contributed to the renaissance in the study of magnetic materials. Three-dimensional network solids exhibiting magnetic ordering have been made from several first-row metal ions and bridging unsaturated cyanide, tricyanomethanide, and/or dicyanamide ligands. These materials possess several different structural motifs, and the shorter the bridge, the stronger the interaction (i.e., -Ctriple bondN- > -Ntriple bondC-N- >> Ntriple bondC-N-Ctriple bondN- = Ntriple bondC-C-Ctriple bondN-). Cyanide additionally has the ability to discriminate between C- and N-bonding to form ordered heterobimetallic magnets, and the strong coupling can lead to ferro- or ferrimagnetic ordering substantially above room temperature. Tricoordination of tricyanomethanide results in spin-frustrated systems, which possess interpenetrating rutile-like networks. In contrast, single rutile-like frameworks are formed by mu(3)-bonded dicyanamide, which leads to ferromagnetics and weak ferromagnetics.
Collapse
Affiliation(s)
- J S Miller
- Department of Chemistry, University of Utah, 315 South 1400 East Room 2124, Salt Lake City, Utah 84112-0850, USA
| | | |
Collapse
|
20
|
Crystal structures and magnetic properties of Mn[N(CN)2]2L {L=2,5-dimethylpyrazine and aminopyrazine}. Polyhedron 2001. [DOI: 10.1016/s0277-5387(01)00631-3] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
21
|
Kremer C, Melián C, Torres J, Juanicó MP, Lamas C, Pezaroglo H, Manta E, Schumann H, Pickardt J, Girgsdies F, Ventura ON, Lloret F. Synthesis, structure and magnetic properties of Mn(II) and Cu(II) complexes with the dicyano-acetic acid methyl ester anion. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(00)00389-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
22
|
Synthesis, X-ray structure, spectroscopy and magnetism of polymeric bis(μ-dicyanamido)(μ-pyrimidine)copper(II) monoacetonitrile; a 3D compound with bridging dicyanamide anions in two dimensions. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(00)00374-1] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
23
|
Manson JL, Huang Q, Lynn JW, Koo HJ, Whangbo MH, Bateman R, Otsuka T, Wada N, Argyriou DN, Miller JS. Long-range magnetic order in Mn[N(CN)2]2(pyz) (pyz = pyrazine). Susceptibility, magnetization, specific heat, and neutron diffraction measurements and electronic structure calculations. J Am Chem Soc 2001; 123:162-72. [PMID: 11273613 DOI: 10.1021/ja0024791] [Citation(s) in RCA: 145] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Using dc magnetization, ac susceptibility, specific heat, and neutron diffraction, we have studied the magnetic properties of Mn[N(CN)2]2(pyz) (pyz = pyrazine) in detail. The material crystallizes in the monoclinic space group P2(1)/n with a = 7.3248(2), b = 16.7369(4), and c = 8.7905 (2) A, beta = 89.596 (2) degrees, V = 1077.65(7) A(3), and Z = 4, as determined by Rietveld refinement of neutron powder diffraction data at 1.35 K. The 5 K neutron powder diffraction data reflect very little variation in the crystal structure. Interpenetrating ReO3-like networks are formed from axially elongated Mn(2+) octahedra and edges made up of mu-bonded [N(CN)2](-) anions and neutral pyz ligands. A three-dimensional antiferromagnetic ordering occurs below T(N) = 2.53(2) K. The magnetic unit cell is double the nuclear one along the a- and c-axes, giving the (1/2, 0, 1/2) superstructure. The crystallographic and antiferromagnetic structures are commensurate and consist of collinear Mn(2+) moments, each with a magnitude of 4.15(6) mu(B) aligned parallel to the a-direction (Mn-pyz-Mn chains). Electronic structure calculations indicate that the exchange interaction is much stronger along the Mn-pyz-Mn chain axis than along the Mn-NCNCN-Mn axes by a factor of approximately 40, giving rise to a predominantly one-dimensional magnetic system. Thus, the variable-temperature magnetic susceptibility data are well described by a Heisenberg antiferromagnetic chain model, giving g = 2.01(1) and J/k(B) = -0.27(1) K. Owing to single-ion anisotropy of the Mn(2+) ion, field-induced phenomena ascribed to spin-flop and paramagnetic transitions are observed at 0.43 and 2.83 T, respectively.
Collapse
Affiliation(s)
- J L Manson
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112-0850, USA.
| | | | | | | | | | | | | | | | | | | |
Collapse
|