Effect of Different Carboxylates on a Series of Ag(I) Coordination Compounds with Benzoguanamine Ligand

Abstract

The ultrasonic reactions of Ag(2)O with benzoguanamine and ancillary carboxylate ligands under the ammoniacal condition gave eight new coordination compounds (CCs), namely, [Ag(4)(bga)(6)(mal)(2)] (1), [Ag(4)(bga)(6)(mlc)(2)] (2), [Ag(bga)(2)(tpa)(0.5)](n) (3), {[Ag(bga)(suc)(0.5)]center dot C(2)H(5)OH}(n) (4), {[Ag(bga)(Pta)(0.5)]center dot CH(3)OH}(n) (5), {[Ag(bga)(ox)(0.5)]center dot C(2)H(5)OH center dot H(2)O}(n) (6), {[Ag(2)(bga)(2)(dnb)(2)]center dot DMF}(n) (7), and [Ag(2)(bga)(2)(pma)(0.5)(H(2)O)](n) (8) (bga = benzoguanamine, H(2)mal = malonic acid, H(2)mlc = maleic acid, H(2)tpa = terephthalic acid, H(2)suc = succinic acid, H(2)pta = phthalic acid, H(2)ox = oxalic acid, Hdnb = 3,5-dinitrobenzoic acid, H(4)pma = pyromellitic acid, and DMF = N,N'-dimethylformamide). All CCs have been characterized by elemental analyses, IR spectra, and single-crystal X-ray diffraction. Compounds 1 and 2 are OD discrete molecules and contain centrosymmetric [Ag(2)(mal)](2) and [Ag(2)(mlc)](2) units, respectively, which are extended to ID supramolecular chains through intermolecule N-H center dot center dot center dot N complementary hydrogen bonds. Compounds 3 and 4 contain similar ID [Ag(2)(tpa)](n) and [Ag(2)(suc)](n) infinite chains incorporating monodentate bga ligand as an ornament. It is noteworthy that the Ag center dot center dot center dot Ag interaction was exclusively observed in the ID chain of compound 4, which may be caused by different coordination environments of the Ag(I) center between 3 and 4. The Ag center dot center dot center dot pi interactions further extend the ID chains into 2D sheet in 4. In 5 and 6, the mu(2)-bga ligands link Ag(I) ions to form ID helical chains, which are further extended by mu(2)-dicarboxylate to 2D 6(3)-hcb net incorporating different dimensions of hexagonal grids. Compound 7 is a ID chain containing [Ag(2)(dnb)(2)] subunits, to which the monodentate and bidentate bga ligands as well as DMF coordinate. Compound 8 is a 2D sheet structure incorporating mu(6)-eta(1):eta(1):eta(1):eta(1):eta(1):eta(0):eta(1):eta(0) pma, monodentate and bidentate bga ligands. The results show that the structural diversity (0D-2D) of the CCs is mainly attributed to the usage of diverse ancillary carboxylate ligands as well as diverse coordination modes of bga ligand. Moreover, the photoluminescence properties of the CCs 1-6 were also investigated in the solid state at room temperature.National Natural Science Foundation of China[21021061, 21071118]; MSTC[2007CB815301

Synthesis, crystal structures, and photoluminescence of two silver(I) coordination polymers based on 2-sulfoterephthalic acid and N-donor ligands

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“…Silver(I) atoms can accommodate a wide variety of stereochemistries, with coordination numbers of two to six and versatile coordination geometries, including linear, T-shaped, square-planar, tetrahedral, square-pyramidal, trigonal-bipyramidal, and octahedral [10][11][12][13]. Furthermore, Ag(I) with a d 10 closedshell electronic configuration tends to form argentophilic interactions, which have an important influence on the formation of polymetallic clusters [14][15][16]. In particular, Ag(I) complexes with carboxylate ligands have been widely investigated for their intriguing structural topologies and potential applications [17][18][19][20].…”

Utilization of mixed ligands to construct two new coordination polymers: Syntheses, structures and properties

“…The preliminary work shows the 2,4-diamine-6-phenyl-1,3,5-triazine (phdat) is a potentially versatile amino-containing N-heterocycle ligand which presents a diverse number of potential coordination and bridging modes, along with multiple accessible hydrogen bonding interaction due to the presence of the amino groups [36][37][38][39]. In addition, the aromatic phenyl rings of phdat provide weak π Á Á Á π stacking interactions.…”

Synthesis, Crystal Structure, Theoretical Study, Thermal ­Behavior, and Luminescence Property of A Bromide‐Bridged Silver(I) Complex with 4, 4′‐Bipyridine

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