Two Ag(I) Complexes Constructed From the Flexible Tripodal Pyridyl-Benzimidazole-Based Connector
摘要:
Two new complexes {Ag-2(TPBT)(NO3)(2)}(n) (1) and Ag-2(TPBT)(4) (ClO4)(2) (2) were constructed by the reaction of tripodal connector 1,3,5-[(2-pyridyl)-1H-benzoimidazol- 1-methyl)-2,4,6-trimethylbenzene (TPBT) and corresponding silver salts under solvothermal conditions. The synergistic effect of the flexible tripodal ligand and anions has led to different complexes 1 and 2. Complex 1 is a 2D layer with the binuclear units with the AgAg distance of 2.9054 angstrom, whereas 2 is a binuclear motif with AgAg separation of 10.526 angstrom. Both 1 and 2 are further extended into 3D supramolecular architectures by hydrogen bonds and interactions, which exhibit weak luminescence emission in the solid state at room temperature.Supplementary material is available for this article. Go to the publisher's online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.
Multinuclear-based copper coordination architectures constructed from pyridyl-1H-benzimidazol-derived flexible tripodal connector and the magnetic behaviors
Consideration of multinuclear-based coordination architecture with specific properties, two new copper complexes based on a tripodal flexible ligand 1,3,5-tris[(2-pyridyl-1H-benzimidazol)-1yl-methyl]-2,4,6-trimethylbenzene (TPBT), namely, [(Cu4Cu4II)-Cu-I(TPBT)(4)(mu-Cl)(4)Cl-8(H2(O))(17)](n), (1), [Cu-6(TPBT)(2)(SO4)(6)(H2O)](n) (2), have been constructed under the solvothermal reactions. Complex 1 is a 2D reticulate structure with the mixed-valence Cu(I,II) centers. While complex 2 features an inclined interpenetration of 2D sheets, which lead to the 3D supramolecular architecture, and its asymmetric unit contains six distinct Cu(II) centers. In addition, upon decreasing the temperature, the chi T-m value of 1 increases gradually to a maximum at 82 K and then decreases. Whereas the sample of 2 is cooled, the feature of chi T-m value exhibits antiferromagnetic interactions between Cu(II) centers. (C) 2014 Elsevier Ltd. All rights reserved.