Supramolecular Complexes of Some First Row d-Block and d10 Elements Synthesis, Characterization and Their Possible Applications

Abstract

Supramolecular complexes based on transition metals with O-donor and N- donor ligand, namely [Cd(Cin)2(H2O)2] (1), [Zn(4,4′-bpy)0.5(Cin)2], (2), [Cd3(4,4′- bpy)2(cin)6(H2O)2]n (3), [Cd(4,4'-bpy)(3-Npt) (H2O)], (4), [Mn2(bpp)(3-Npt)2(H2O)2] (5), [Ni(bpp)(3-Npt)(H2O)], (6), {[Ag2(bpp)2] (4H2O)-(3-Npt)}n (7), {[Ag2(bpe)2(3- Npt)]-7H2O} (8), [Zn(bpp)2(sal)2]» (9), [Zn2(bpe)2(sal)4] (10), {[Co(bpp)2(H2O)2]·(4- abs)2-H2O} (11), [Mno.s(bpp)(H2O)2]·(4-abs) (12), {[Cdo.s(bpp)(4-abs)] (H2O)}n (13), [Zno.s(bpp)(H2O)2]-(4-abs) (14) {[Zn(4,4'-bpy)(H2O)4] (4-abs)2-2H2O} (15), {[Cd(4,4'-bpy)1.5(H2O)3]·(4-abs)·(4,4'-bpy)-(H2O)-NO3}n (16), {[Cdo.s(bpe)(4- n abs)] H2O} (17), {[Cd(bpp)2(H2O)2]·(3-abs)2 2H2O}n (18), [Zn(bpp)2(Mbs)2]» (19), {[Cd(bpp)(sdz)2]+2H2O}n [Cd(bpp)2(Mbs)2]n (20), {[Zn(bpe)(sdz)(ac)]·H2O} (22) [where bpy pyridyl)propane, bpe = = (21), and 4,4'-bipyridine, bpp = 1,3-bis(4- 1,2-bis(4-pyridyl)ethane, cin = Cinnamate, 3-Npt = 3- Nitrophtalate sal = Salicylate, 4-abs = Sulfanilate, sdz = Sulfadiazine, 3-abs = 3- aminobenzinesulfonate, and Mbs = p-Toluenesulfonate] have been synthesized under suitable conditions. All complexes were characterized by Fourier-transformed infrared spectroscopy, Elemental analysis, Thermogravimetric analysis, Powder X-ray diffraction, Single crystal X-ray diffraction, Nuclear magnetic resonance, UV-Visible spectrophotometer, and photoluminescence spectroscopy. The complexes (2), (9), (10), (13), (14), (17), (18), (19), and (20) showed strong photoluminescence in the solid state at room temperature. Other applications such as adsorption property, photocatalytic property, fluorescence sensing for metal ions property, and antibacterial activity were also investigated. The photodegradation study of complex (7) and complex (8) showed that both complexes were active photocatalysts for degradation MB and RhB dyes under UV and visible light. Complexes (9) and (10) exhibited selectivity and sensitivity to Cu2+ compared with other metal ions such as Cd2+, Mn2+, Sr2+, K+, Na+, Ni2+, Co2+, and Ca2+ via a fluorescence quenching mechanism. The detection limit for Cu2+ of complexes (9) and (10) were about 3.9 × 10 mol/L and 8.9 × 107 mol/L, respectively. Moreover, antibacterial studies of complexes (9) and (10) in dimethylsulfoxide (DMSO) solution were carried out in order to measure zone of inhibition values. The antibacterial activity of complexes for Gram negative bacteria was higher than Gram positive bacteria. The adsorption study for the adsorption of orange G (OG) dye onto complex (7) as a function of effect of contact time, adsorbent dose, and initial dye concentration were investigated. The data suggested that the Langmuir isotherm was the favored model over the Freundlich isotherm for OG dye.