Concomitant binding of a nickel(II) cation and a nitrate anion by the ligand 2,4,6-tri-2-pyridyl-1,3,5-triazine (TPTZ): The crystal structure of [Ni(HTPTZ)(H2O)3]3+ · 3NO3− · H2O

Byers, Paul; Chan, G. Y. S.; Drew, Michael G. B.; Hudson, Michael J.; Madic, C.

doi:10.1016/0277-5387(95)00588-9

Cited by 42 publications

(16 citation statements)

References 5 publications

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“…2). Two tridentate ligands, tptz, are coordinated to the metal ion through their N atoms in a mutually perpendicular fashion, which provides a distorted octahedral geometry around the nickel, due to the steric demands of the tptz ligands, with N-Ni-N angles subtended by the ligand of 76.9°, 87.04°and 152.7°t hat is comparable to previously reported Ni-tptz complexes [3,39,40,54]. The dihedral angles between the triazine rings and each of the pyridyl rings are 4.80°, 5.45°, 15.71°, 5.72°, 14.61°and 20.68°.…”

Section: Resultssupporting

confidence: 73%

“…The dihedral angles between the triazine rings and each of the pyridyl rings are 4.80°, 5.45°, 15.71°, 5.72°, 14.61°and 20.68°. The Ni-N (triazine) bond lengths in two tptz moieties, smaller than the Ni-N (pyridyl) bond lengths (Table 2), compared well with the reported Ni-N distances for Ni complexes [3,39,40,54]. In complex (2) there is a CH 3 CN solvent molecule and two PF 6 -counter ions.…”

Section: Resultssupporting

confidence: 61%

“…The Ni(II) ion is distorted from octahedral geometry due to the steric demands of the tptz ligand. The shortness of the Ni-N (triazine) bond (2.002(3) Å ) compared with the Ni-N (pyridyl) bonds (2.146(3) and 2.161(3) Å ) ( Table 2) is suggested to be due to the stronger p-accepting properties of the triazine ring or due to the constricted coordination geometry imposed by the linear triazine ligand which is consistent with other metal-tptz complexes [3,39,40]. There are several crystal structures of bis(tptz) complexes, [M(tptz) 2 ] n?…”

Section: Resultssupporting

confidence: 53%

“…Among the polypyridyl ligands, tptz has drawn much attention because of its multiple coordination sites (major, middle, and minor) [3] (scheme 1) and large stabilizing p systems [4][5][6]. At first, it has been used as an analytical reagent for various metals.…”

mentioning

confidence: 99%

“…There is considerable interest in the coordination chemistry of tptz as a complexant for the separation and extraction of trivalent lanthanide(III) and actinide(III) ions [3,7,8], as a rigid strained ligand for catalytic transition metal centers [5], the potential antitumor characteristics of its platinum-group metal complexes [9], and the preparation of DNA cleaving agents [10]. It acts as a building block to form polynuclear complexes and the coordination networks of huge supramolecular architectures [11][12][13][14][15].…”

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confidence: 99%

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Nickel(II) polypyridyl Complexes of 2,4,6-Tris(2-pyridyl)-1,3,5-triazine

et al. 2012

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The synthesis, purification, characterization, electrochemical properties, and fluorescence quenching of two new mononuclear Ni(II) complexes, [Ni(tptz) (CH 3 OH)Cl 2 ] (1) and [Ni(tptz) 2 ](PF 6 ) 2 ÁCH 3 CN (2), containing the ligand 2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz) are described. Solid state structures of both complexes have been determined by single crystal X-ray crystallography. In (1) and (2), the Ni(II) metal centers use the major coordination site of the tptz ligand and the coordination geometry around the Ni(II) is a distorted octahedron. The free tptz ligand has three emission bands that are assigned to the 1 (p-p * ) and 1 (n-p * ) states. The fluorescence spectra of (1) and (2) show that the fluorescence quenching of the tptz fluorophore proceeds via an energy transfer process. Magnetic susceptibility data derived from paramagnetic NMR revealed effective magnetic moments of 2.75 l B for (1), and 2.91 l B for (2) at room temperature. Cyclic voltammetry of (1) shows that the Ni(III/II) reduction couple is quasi-reversible whereas in complex (2), the Ni(II/I) couple indicates an electrochemical (EC) mechanism.

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Section: Resultssupporting

confidence: 73%

Section: Resultssupporting

confidence: 61%

Section: Resultssupporting

confidence: 53%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Nickel(II) polypyridyl Complexes of 2,4,6-Tris(2-pyridyl)-1,3,5-triazine

et al. 2012

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Synthesis, characterization and luminescent properties of europium complexes with 2,4,6‐tris‐(2‐pyridyl)‐s‐triazine as highly efficient sensitizers

et al. 2015

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Using 2,4,6-tris-(2-pyridyl)-s-triazine (TPTZ) as a neutral ligand, and p-hydroxybenzoic acid, terephthalic acid and nitrate as anion ligands, five novel europium complexes have been synthesized. These complexes were characterized using elemental analysis, rare earth coordination titrations, UV/vis absorption spectroscopy and infrared spectroscopy. Luminescence spectra, luminescence lifetime and quantum efficiency were investigated and the mechanism discussed in depth. The results show that the complexes have excellent emission intensities, long emission lifetimes and high quantum efficiencies. The superior luminescent properties of the complexes may be because the triplet energy level of the ligands matches well with the lowest excitation state energy level of Eu(3+). Moreover, changing the ratio of the ligands and metal ions leads to different luminescent properties. Among the complexes, Eu2(TPTZ)2(C8H4O4)(NO3)4(C2H5OH)·H2O shows the strongest luminescence intensity, longest emission lifetime and highest quantum efficiency.

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Synthesis, Crystal Structures, and Magnetic Properties of a Mono‐ and a Dinuclear Copper(II) Complex of the 2,4,6‐Tris(2‐pyridyl)‐1,3,5‐triazine Ligand

2004

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The reaction of 2,4,6‐tris(2‐pyridyl)‐1,3,5‐triazine (tptz) with Cu(BF4)2·3H2O and N,N‐bis(3‐aminopropyl)methylamine (Medpt) yielded the monomeric complex [(tptz)CuII(Medpt)](BF4)2·2MeOH (1) whereas reaction of tptz with CuCl2·2H2O yielded the dinuclear complex [{CuIICl2}(tptz){CuIICl2(MeOH)}] (2). The molecular structures of 1 and 2 were established by single‐crystal X‐ray diffraction studies. The copper ion in complex 1 is elongated octahedral with the nitrogen atoms of Medpt and the triazine nitrogen atom of tptz in the equatorial positions, and the two pyridyl nitrogen atoms of tptz in axial positions. The two CuII ions in complex 2 are bridged by tptz, coordinating to Cu1 in a terpyridine‐like fashion and to Cu2 in a bipyridine‐like coordination mode. The triazine nitrogen atom bound to Cu1 is coordinated in an equatorial position whereas the triazine nitrogen atom bound to Cu2 is situated in the apical position. The equatorial plane of Cu1 is coplanar with the 1,3,5‐triazine plane whereas the equatorial plane of Cu2 is perpendicular to the 1,3,5‐triazine plane. Intermolecular interactions in the solid state result in both compounds in “dimeric units” due to hydrogen bonding. Both complexes were investigated by variable‐temperature magnetic susceptibility measurements. Through‐space dipolar couplings and/or weak through‐bond interactions in complex 1 result in a small intermolecular antiferromagnetic interaction (J = −0.09 cm−1). The intramolecular exchange coupling in the dinuclear complex 2 is antiferromagnetic (J = −2.5 cm−1). This antiferromagnetic interaction was analyzed in view of the molecular structure considering spin‐polarization, superexchange and orbital‐orthogonality. A spin‐polarization pathway seems to be the leading contribution which does not involve the 1,3 bridging pathway. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)

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Concomitant binding of a nickel(II) cation and a nitrate anion by the ligand 2,4,6-tri-2-pyridyl-1,3,5-triazine (TPTZ): The crystal structure of [Ni(HTPTZ)(H2O)3]3+ · 3NO3− · H2O

Cited by 42 publications

References 5 publications

Nickel(II) polypyridyl Complexes of 2,4,6-Tris(2-pyridyl)-1,3,5-triazine

Nickel(II) polypyridyl Complexes of 2,4,6-Tris(2-pyridyl)-1,3,5-triazine

Synthesis, characterization and luminescent properties of europium complexes with 2,4,6‐tris‐(2‐pyridyl)‐s‐triazine as highly efficient sensitizers

Synthesis, Crystal Structures, and Magnetic Properties of a Mono‐ and a Dinuclear Copper(II) Complex of the 2,4,6‐Tris(2‐pyridyl)‐1,3,5‐triazine Ligand

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