Syntheses and Structures of Ag(I)-Containing Coordination Polymers and Co(II)-Containing Supramolecular Complex Based on Novel Fulvene Ligands

Abstract

Three new rigid conjugated fulvene ligands L1-L3 were synthesized. L1 and L3 have been prepared by an aroylation reaction of cyclohexyl-substituted cyclopentadienyl anions. L2 was prepared by the reaction of L1 with PhNHNH2 in hot enthanol. Six new coordination polymers, namely [Ag(C25H20N2O2)(ClO4)] x 3.5C6H6 (1), [Ag2(mu-C31H24N4)(eta2-C6H6)(H2O)](ClO4)2 x (C6H6) x (H2O)0.5 (3), [Ag(C31H24N4)]SbF6 x solvate (4), [Ag(C31H24N4)](SbF6)2 x 2C6H6 x CH2Cl2 (5), [Ag(C25H20N2O2)2]SbF6 (6), and [Ag(C25H20N2O2)2]SbF6 (7), and one seven-membered cobaltacycle-containing complex, namely Co(C25H20N2O2)2(C2H5OH)2 (2), were obtained through self-assembly based on these three new fulvene lignads. L2-L3 and compounds 1-7 have been fully characterized by infrared spectroscopy, elemental analysis, and single-crystal X-ray diffraction. The results indicate that the coordination chemistry of new fulvene ligands is versatile. They can bind metal ions not only through the terminal N-donors and fulvene carbon atoms into organometallic coordination polymers but also through the two chelating carbonyl groups into unusual seven-membered metallo-ring supramolecular complexes. In the solid state, ligands L1-L3 are luminescent. A blue-shift in the emission was observed between the free ligand L1 and the one incorporated into Co(II)-containing complex 2, and a red-shift in the emission was observed between the free ligand L3 and the one incorporated into Ag(I)-containing polymeric compounds 6 and 7.

Co(II) and Cd(II) Complexes Based on 5-[(2-Methyl-1H-imidazol-1- yl)methyl]isophthalate: Syntheses, Characterization and Properties

“…Previous studies have shown that coordination compounds containing d 10 metal centers such as Cd(II) may exhibit excellent luminescence properties and have potential applications as photoactive materials [24,25]. In the present work, the luminescence of complex 2 and the parent H 2 L compound has been investigated in the solid state at room temperature.…”

Synthesis, Crystal Structure and Luminescent Property of A Novel Cd(II) Coordination Polymer with Bis-imidazole Ligand

“…Furthermore, the adjacent 2D layers are connected via an additional pair of bbi ligands along the c axis to form the resultant 3D supramolecular architectures with the inter-layer distance of 14.0271(15) Å (Figure 4). From the topological point of view, the 3D structure of 1 can be reduced to a (4,4) 27, 28 The structures of these complexes comprise two equivalent, mutually interpenetrating three-dimensional networks, while polymer 1 forms an open, microporous structure.…”

“…[1][2][3] The key to the successful design of metal-organic coordination polymers is the judicious selection of organic ligand. 4 Recently, polydentate aromatic nitrogen heterocyclic ligands with fivemembered rings have been well-studied in the construction of supramolecular structure for their N-coordinated sites apt to coordinating to transition metals. Similar to six-membered N-heterocyclic ligands, the azole-based five-membered N-heterocyclic ligands, such as imidazoles, triazoles and tetrazoles have been extensively employed in the construction of various coordination polymers with diverse topologies and interesting properties.…”

Syntheses, Structural Characterization and Fluorescence of Zn(II) and Cd(II) Polymers from 5-(Pyridin-2-ylmethylamino)isophthalic acid

“…The luminescence properties of complexes with d 10 metal centers such as Zn(II) and Cd(II) are of interest for their potential application as photoactive materials [16,17]. Therefore, the luminescence of complexes 1 and 2 and the H 2 L reference was investigated in the solid state at room temperature.…”