Unique self-assembled 2D metal-tetrazolate networks: crystal structure and magnetic properties of [M(pmtz)2](M = Co(ii) and Fe(ii); Hpmtz = 5-(pyrimidyl)tetrazole)

Rodríguez, Antonio García; Kivekäs, Raikko; Colacio, Enrique

doi:10.1039/b509069e

Cited by 106 publications

(55 citation statements)

References 27 publications

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“…Hydrothermal reaction of CoCl 2 and 3-amino-1,2,4-triazole in a 1:2 molar ratio yields [Co 2 Cl(3-amino-1,2,4-triazole) 3 ] (1) as a monophasic product. Optical microscopy shows it to be comprised of small blue needle-shaped crystals with a strong blue-pink dichroism.…”

Section: Resultsmentioning

confidence: 99%

“…Crystallizing in a primitive hexagonal cell (Table 1) a good structural model for 1 was obtained in the non-polar space group P6 3 /mmc (#194), revealing an aesthetically pleasing 3-dimensional coordination network. Selected geometric parameters are given in Table 2.…”

Section: X-ray Crystal Structurementioning

confidence: 99%

“…[1, 3,5] We present here [Co 2 Cl(3-amino-1,2,4-triazole) 3 ] (1), a complex and intriguing magnetically coupled coordination network. The implications of the observed ferrimagnetic ordering are discussed in view of the effect of structural disorder on the network topology.…”

Section: Introductionmentioning

confidence: 99%

“…The ability of azoles, [1] triazoles [2] and tetrazoles [3] to bridge transition metal ions is central to the recent increased interest in their coordination chemistry. From a structural perspective You et al [4] have recently prepared a beautiful "open framework" materials from cobalt(II) and imidazole, which display extensive polymorphism and a zeolitic character.…”

Section: Introductionmentioning

confidence: 99%

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Topological ferrimagnetism and superparamagnetic-like behaviour in a disordered homometallic coordination network

2007

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. (2007) Topological ferrimagnetism and superparamagnetic-like behaviour in a disordered homometallic coordination network. Dalton Transactions, 2007 (36 Crystals of a cobalt(II) 3-amino-1,2,4-triazolate; Co 2 Cl(C 2 N 4 H 3 ) 3 , 1 can be formed from a hydrothermal synthesis. X-ray crystallography shows an extended 3-dimensional network structure within a hexagonal space group with a = 9.9655 (7) and c = 7.7523(7) Å. The data reveals an orientational disorder to the ligand. Structural considerations suggest that the ligand orientation is strongly correlated in 1-dimension, but the nature and length scale of the 2-dimensional order is not obvious. The structure is discussed in terms of three key structural models, two of which are crystallographically ordered, while the third is disordered in 2-dimensions. The effect of ligand orientation on the network topology has profound effects on the expected magnetic behaviour, with two of the fully ordered models having either antiferromagnetic or ferrimagnetically ordered ground states. at 2 K). In the intermediate temperature range 4.5 to 5.3 K we see unusual behaviour with evidence of rapid, low-energy relaxation of the magnetisation. The unusual relationship between the structure and the magnetism of 1 is discussed in detail.

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Section: Resultsmentioning

confidence: 99%

Section: X-ray Crystal Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Topological ferrimagnetism and superparamagnetic-like behaviour in a disordered homometallic coordination network

2007

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“…Discussion 5-Substituted 1H-tetrazoles have demonstrated to be very good ligands for the formation of multidimensional coordination polymers exhibiting agreat structural diversity and interesting optical, magnetic and hydrogen storage properties [1][2][3][4][5][6]. Moreover, many six-or seven-coordinated Cd(II) polymers have recently received attention because of their excellent photo-luminescence properties [7,8].…”

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confidence: 99%

Crystal structure of bis[(1-(4-carboxyphenyl)-5-mercapto-1H-tetrazole)-(1,10-phenanthroline)]cadmium(II), Cd(C8H5N4O2S)2(C12H8N2)2

Hu¹,

Wang²

2010

Zeitschrift Für Kristallographie - New Crystal Structures

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Experimental detailsThe hydrogen atoms bound to oxygen atoms were found in the difference Fourier map and refined freely. The hydrogen atoms bound to carbon atoms were included in calculated positions and treated as riding with d(C-H) =0.93 -0.96 Å and U iso(H) =1.2 or 1.5 U eq (C).Discussion 5-Substituted 1H-tetrazoles have demonstrated to be very good ligands for the formation of multidimensional coordination polymers exhibiting agreat structural diversity and interesting optical, magnetic and hydrogen storage properties [1][2][3][4][5][6]. Moreover, many six-or seven-coordinated Cd(II) polymers have recently received attention because of their excellent photo-luminescence properties [7,8].In the title crystal structure, the asymmetric unit consists of one Cd(II) center, two phen molecules, and two Lligands. The Cd(II) ion has ad istorted octahedral environment, defined by four N atoms from two chelating phen molecules and two Satoms from two Ll igands. The Cd-Sb ond lengths are in the range of 2.5735(9) -2.6574(9) Å and The Cd-Nbond lengths are in the range of 2.394(3) -2.416(3) Å,respectively. The Lligand adopts an unidentate coordination mode. The carboxyl and Natoms from Ll igands and Ha toms from phen molecules are involved in intramolecular O-H···O, O-H···N, C-H···Oa nd C-H···N hydrogen bonds, which result in a3Dsupramolecular structure. In addition, the structure also contains p···p stacking interaction betweent he completely parallel phenyl rings of adjacent L ligandswith the centroid-centroid distance of 3.606 Å.

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(Nitronyl Nitroxide)‐Substituted Trioxytriphenylamine Radical Cation Tetrachlorogallate Salt: A 2p‐Electron‐Based Weak Ferromagnet Composed of a Triplet Diradical Cation

Kuratsu

Suzuki

Kozaki

et al. 2012

Chemistry An Asian Journal

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The synthesis and the solid state magnetic properties of (nitronyl nitroxide)-substituted trioxytriphenylamine radical cation tetrachlorogallate, NNTOT(+)⋅GaCl(4)(-), are reported. In the temperature region between 300 and 3 K, the magnetic behavior is characterized by the strong intramolecular ferromagnetic interaction (J/k(B)=+400 K) between the radical (NN) and the radical cation (TOT(+)) and the weak intermolecular antiferromagnetic interaction (J/k(B)=-1.9 K) between NNTOT(+) ions. Below 3 K, a 3D-type long-range magnetic ordering into a weak ferromagnet was observed (T(N)=2.65 K). The magnetic entropy (S(mag)=8.97 J K(-1) mol(-1)) obtained by the heat capacity measurement is in good agreement with the theoretical value of R ln3=9.13 J K(-1) mol(-1) based on the S=1 state.

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Unique self-assembled 2D metal-tetrazolate networks: crystal structure and magnetic properties of [M(pmtz)2](M = Co(ii) and Fe(ii); Hpmtz = 5-(pyrimidyl)tetrazole)

Abstract: The title compounds, which have been prepared from M(II) salts (M = Co and Fe) and 5-(pyrimidyl)tetrazole under hydrothermal conditions, are isomorphous and exhibit a 2D square-grid-like structure; the cobalt complex is a spin-canted antiferromagnet with Tc= 15 K.

Cited by 106 publications

References 27 publications

Topological ferrimagnetism and superparamagnetic-like behaviour in a disordered homometallic coordination network

Topological ferrimagnetism and superparamagnetic-like behaviour in a disordered homometallic coordination network

Crystal structure of bis[(1-(4-carboxyphenyl)-5-mercapto-1H-tetrazole)-(1,10-phenanthroline)]cadmium(II), Cd(C8H5N4O2S)2(C12H8N2)2

(Nitronyl Nitroxide)‐Substituted Trioxytriphenylamine Radical Cation Tetrachlorogallate Salt: A 2p‐Electron‐Based Weak Ferromagnet Composed of a Triplet Diradical Cation

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