Pillared 3d−4f Frameworks with Rare 3D Architecture Showing the Coexistence of Ferromagnetic and Antiferromagnetic Interactions between Gadolinium Ions

Luo, Feng; Hu, Dong; Xue, Lin; Che, Yun‐Xia; Zheng, Ji‐Min

doi:10.1021/cg060823l

Cited by 87 publications

(35 citation statements)

References 34 publications

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“…Being easily and efficiently synthesized from relatively simple subunits, these complexes exhibit fascinating structural topologies and potential applications as functional materials [1][2][3][4][5][6][7][8]. To build these molecular architectures, researchers often employ bridging poly-carboxylate and bipyridyl ligands to construct coordination polymers because of their versatile coordination modes and high structural stability.…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of bis[(hydrogen 5-methylisophthalato)-(2,5-bis(4- pyridyl)-1,3,4-thiadiazole)]zinc(II) dihydrate, Zn(C9H7O4)2(C12H8N4S)2 · 2H2O

Li¹,

Chang²

2010

Zeitschrift Für Kristallographie - New Crystal Structures

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Source of materialDirect mixing of the starting materials in solution leads to immediate fine precipitate formation. In order to obtain crystals, suitable for X-ray diffraction analysis, the hydrothermal methods were applied. Amixture of 5-methylisophthalic acid (CH 3H2ip, 0.1 mmol), 2,5-bis(4-pyridyl)-1,3,4-thiadiazole (bpt, 0.1 mmol), Zn(OAc) 2 · 4H 2 O( 0.1 mmol), KOH (0.10 mmol) and H 2 O (15 mL) was placed in aTeflon-lined stainless steel vessel, heated to 140°Cfor 4days, and then cooled to room temperature over 24 h. Colorless block-shaped crystals of the title compound were obtained. DiscussionThe rational design and assembly of inorganic coordination polymers or metal-organic frameworks have received remarkable attention and have been developed rapidly in recent years. Being easily and efficiently synthesized from relatively simple subunits, these complexes exhibit fascinating structural topologies and potential applications as functional materials [1][2][3][4][5][6][7][8]. To build these molecular architectures, researchers often employ bridging poly-carboxylate and bipyridyl ligands to construct coordination polymers because of their versatile coordination modes and high structural stability. Exo-bidentate rod-like N,N'-donor ligands, such as 4,4-bipyridine, can have significant influence on the assembly systems of multicarboxylate ligands and metal centers. Its derivatives dpe (1,2-bi(4-pyridyl)ethene), bpa (1,2-bi(4-pyridyl) ethane) and bpp (1,3-di(4-pyridyl)propane) with certain spacers between the two 4-pyridyl rings may also lead to fascinating architectures with interesting properties. Unlike the more commonly used 4,4-bipyridine-like ligands, 2,5-bis(4-pyridyl)-1,3,4-thiadiazole possesses an angular disposition of its terminal pyridyl spacers. Its central thiadiazole ring and two more potential N-donor atoms inducing flexible coordination modes, which favours the construction of unexpected, unpredictable and interesting frameworks. The asymmetric unit contains one Zn(II) cation, two bpt ligands, two CH 3Hip anions and two lattice water molecules. The Zn II ion is four-coordinated with adistorted tetrahedral environment, provided by two pyridyl Natoms from two different bpt molecules, two carboxylate Oa toms from two CH3Hip molecules. The Zn-Nb ond length is 2.046(2) Å and the Zn-Od istances is 1.950(2) Å.5-Methylisophthalate acts as amonodentate ligand in an mono-anion mode. 2,5-Bis(4-pyridyl)-1,3,4-thiadiazole acts as amono-dentate ligand. Several kinds of hydrogen bonding are observed in the crystal structure: (a) hydrogen bonding between water oxygen atoms and uncoordinated oxygen atoms of carboxylate group O5-H1W···O2 with the bond distance of 3.082(3) Å and bond angle of 135.6°;(b) hydrogen bonding between water oxygen atoms and coordinated oxygen atoms of carboxylate unit (O5-H2W···O1, 2.784(3) Å,163.3°); (c) hydrogen bonding between uncoordinated oxygen atoms of carboxylate group and uncoordinated nitrogen atoms of pyridyl group (O3-H3···N4, 2.677(2) Å,174.2°). These weak hydrogen bonds f...

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Section: Discussionmentioning

confidence: 99%

Crystal structure of bis[(hydrogen 5-methylisophthalato)-(2,5-bis(4- pyridyl)-1,3,4-thiadiazole)]zinc(II) dihydrate, Zn(C9H7O4)2(C12H8N4S)2 · 2H2O

Li¹,

Chang²

2010

Zeitschrift Für Kristallographie - New Crystal Structures

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“…The design of metal-organic coordination polymers is of current interest in the fields of supramolecular chemistry and crystal engineering because of their potential applications as functional materials [1,2]. It is well known that organic ligands containing O or Ndonors play crucial roles in the design and construction of desirable frameworks and they are widely used as building blocks to link metal ions and produce interesting metal-organic framework structures and properties [3].…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of bis(2-pyridin-2-yl-ethanone)cobalt(II) dithiocyanate - 2-nitrophenylamine, Co(C₇H₇ON)₂(SCN)₂ · C₆H₆N₂O₂

Guo¹

2009

Zeitschrift Für Kristallographie - New Crystal Structures

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Source of material 2-Acetylpyridine (0.1 mmol, 12.1 mg), NH 4 SCN (0.1 mmol, 7.6 .mg), Co(CH3COO)2 (0.1 mmol, 17.7 mg) and o-nitroaniline (0.1 mmol, 13.8 mg) were dissolved in methanol (10 ml). The mixture was stirred for 30 min at room temperature to give aclear brown solution. The title compound were obtained from the solution after 4d.Crystals of the title compound suitable for X-ray diffraction experiment were recrystallized from methanol after one week at room temperature. DiscussionThe design of metal-organic coordination polymers is of current interest in the fields of supramolecular chemistry and crystal engineering because of their potential applications as functional materials [1,2]. It is well known that organic ligands containing O or Ndonors play crucial roles in the design and construction of desirable frameworks and they are widely used as building blocks to link metal ions and produce interesting metal-organic framework structures and properties [3]. The title crystal structure consists of Co(C 7 H 7 ON) 2 (SCN) 2 molecules and uncoordinated o-nitroaniline molecules. 2-Acetylpyridine ligand bonds the metal ion through its carbonylic oxygen O1 and pyridine nitrogen N, two SCN − bond the metal through their nitrogen atoms, the Co 2+ is six-coordinated in form of adistorted octahedron. The {Co(C 7 H 7 NO) 2 (SCN) 2 }m olecule is asymmetric with respect to Co-Nand Co-Obonds. The corre-The acute angles (O1-Co-N1 and O2-Co-N2) in the five-membered chelate ring are 74.73(8)°and 74.87(9)°,respectively, and other acute angle around Co (N3-Co-N4) is 94.9(1)°.The pyridine rings of 2-acetylpyridine ligands and the five-membered chelate ring are nearly coplanar, the torsion angles of C7-N1-C3-C2 and C14-N2-C10-C9 are 179.3(3) Å and -174.9(2) Å,r espectively. To avoide the conflicts, the two rigid ring systems, ring A(N1/C3-C7) and ring B(N2/C10-C14) are rotated by 86.90°.Ap-pinteraction dimer is formed between ring Band the phenyl ring with an parallel manner, of which the dihedral angle being 2.02°,t he intercentroid distances being 4.719 Å and interplanar distances being 3.373 Å.All the intercentroid and interplanar distances are comparable to the reported previously [4]. There are some intramolecular (N5-H5B···O3) and intermolecular (N5-H5A···N4 (x-1,y,z)a nd N5-H5B···S3(-x+1,-y+1,-z+1) hydrogen bonds in the complex. These hydrogen bonds and p-p stacking interactions link the 2-acetylpyridine ligands, SCN − ligands and an isolated o-nitroaniline molecule together, and play very important roles in the formation and stability of the title compound.

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“…The design of metal-organic coordination polymers is of current interest in the fields of supramolecular chemistry and crystal engineering because of their potential applications as functional materials [ 1,2]. It is well known that organic ligands containing O or Ν donors play crucial roles in the design and construction of desirable frameworks and they are widely used as building blocks to link metal ions and produce interesting metal-organic framework structures and properties [3].…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of bis(2-pyridin-2-yl-ethanone)cobalt(II) dithiocyanate – 2-nitrophenylamine, Co(C7H7ON)2(SCN)2 · C6H6N2O2

Guo¹

2009

Zeitschrift Für Kristallographie - New Crystal Structures

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= 0.092, T= 298 K.Source of material 2-Acetylpyridine (0.1 mmol, 12.1 mg), NH4SCN (0.1 mmol, 7.6 mg), Co(CH3COO)2 (0.1 mmol, 17.7 mg) and o-nitroaniline (0.1 mmol, 13.8 mg) were dissolved in methanol (10 ml). The mixture was stirred for 30 min at room temperature to give a clear brown solution. The title compound were obtained from the solution after 4 d. Crystals of the tide compound suitable for X-ray diffraction experiment were recrystallized from methanol after one week at room temperature. DiscussionThe design of metal-organic coordination polymers is of current interest in the fields of supramolecular chemistry and crystal engineering because of their potential applications as functional materials [ 1,2]. It is well known that organic ligands containing O or Ν donors play crucial roles in the design and construction of desirable frameworks and they are widely used as building blocks to link metal ions and produce interesting metal-organic framework structures and properties [3]. The title crystal structure consists of Co(C7H?ON)2(SCN)2 molecules and uncoordinated o-nitroaniline molecules. 2-Acetylpyridine ligand bonds the metal ion through its carbonylic oxygen Ol and pyridine nitrogen N, two SCN~ bond the metal through their nitrogen atoms, the Co 2+ is six-coordinated in form of a distorted octahedron. The {Co (C7H7NO) (9)°, respectively, and other acute angle around Co (N3-Co-N4) is 94.9(1)°. The pyridine rings of 2-acetylpyridine ligands and the five-membered chelate ring are nearly coplanar, the torsion angles of C7-N1-C3-C2 and C14-N2-C10-C9 are 179.3(3) Â and -174.9(2) Â, respectively. To avoide the conflicts, the two rigid ring systems, ring A (N1/C3-C7) and ring Β (N2/C10-C14) are rotated by 86.90°. Α π-π interaction dimer is formed between ring Β and the phenyl ring with an parallel manner, of which the dihedral angle being 2.02°, the intercentroid distances being 4.719 Â and interplanar distances being 3.373 À. All the intercentroid and interplanar distances are comparable to the reported previously [4]. There are some intramolecular (N5-H5B-03) and intermolecular (N5-H5A-N4 C*-l,y,z) and N5-H5B -S3(-jt+l,-y+l,-z+l) hydrogen bonds in the complex. These hydrogen bonds and π-π stacking interactions link the 2-acetylpyridine ligands, SCN~ ligands and an isolated o-nitroaniline molecule together, and play very important roles in the formation and stability of the title compound.

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Pillared 3d−4f Frameworks with Rare 3D Architecture Showing the Coexistence of Ferromagnetic and Antiferromagnetic Interactions between Gadolinium Ions

Cited by 87 publications

References 34 publications

Crystal structure of bis[(hydrogen 5-methylisophthalato)-(2,5-bis(4- pyridyl)-1,3,4-thiadiazole)]zinc(II) dihydrate, Zn(C9H7O4)2(C12H8N4S)2 · 2H2O

Crystal structure of bis[(hydrogen 5-methylisophthalato)-(2,5-bis(4- pyridyl)-1,3,4-thiadiazole)]zinc(II) dihydrate, Zn(C9H7O4)2(C12H8N4S)2 · 2H2O

Crystal structure of bis(2-pyridin-2-yl-ethanone)cobalt(II) dithiocyanate - 2-nitrophenylamine, Co(C₇H₇ON)₂(SCN)₂ · C₆H₆N₂O₂

Crystal structure of bis(2-pyridin-2-yl-ethanone)cobalt(II) dithiocyanate – 2-nitrophenylamine, Co(C7H7ON)2(SCN)2 · C6H6N2O2

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Pillared 3d−4f Frameworks with Rare 3D Architecture Showing the Coexistence of Ferromagnetic and Antiferromagnetic Interactions between Gadolinium Ions

Cited by 87 publications

References 34 publications

Crystal structure of bis[(hydrogen 5-methylisophthalato)-(2,5-bis(4- pyridyl)-1,3,4-thiadiazole)]zinc(II) dihydrate, Zn(C9H7O4)2(C12H8N4S)2 · 2H2O

Crystal structure of bis[(hydrogen 5-methylisophthalato)-(2,5-bis(4- pyridyl)-1,3,4-thiadiazole)]zinc(II) dihydrate, Zn(C9H7O4)2(C12H8N4S)2 · 2H2O

Crystal structure of bis(2-pyridin-2-yl-ethanone)cobalt(II) dithiocyanate - 2-nitrophenylamine, Co(C7H7ON)2(SCN)2 · C6H6N2O2

Crystal structure of bis(2-pyridin-2-yl-ethanone)cobalt(II) dithiocyanate – 2-nitrophenylamine, Co(C7H7ON)2(SCN)2 · C6H6N2O2

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Crystal structure of bis(2-pyridin-2-yl-ethanone)cobalt(II) dithiocyanate - 2-nitrophenylamine, Co(C₇H₇ON)₂(SCN)₂ · C₆H₆N₂O₂