title: Nano-sized, quaternary titanium(IV) metal-organic frameworks with multidentate ligands.
abstract: Some mononuclear nano-sized, quaternary titanium(IV) complexes having the general formula [Ti(acac)(OOCR)2(SB)] (where Hacac=acetylacetone, R=C15H31 or C17H35, HSB=Schiff bases) have been synthesized using different multidentate ligands. These were characterized by elemental analyses, molecular weight determinations and spectral (FTIR, 1H NMR and powder XRD) studies. Conductance measurement indicated their non-conducting nature which may behave like insulators. Structural parameters like the values of limiting indices h, k, l, cell constants a, b, c, angles α, β, γ and particle size are calculated from powder XRD data for complex 1 which indicated nano-sized triclinic system in them. Bidentate chelating nature of acetylacetone, carboxylate and Schiff base anions in the complexes was established by their infrared spectra. Molecular weight determinations confirmed mononuclear nature of the complexes. On the basis of physico-chemical studies, coordination number 8 was assigned for titanium(IV) in the complexes. Transmission electron microscopy (TEM) and the selected area electron diffraction (SAED) studies indicated spherical particles with poor crystallinity.
authors.affiliation: Coordination Chemistry Research Laboratory, Department of Chemistry, DDU Gorakhpur University, Gorakhpur 273 009, India. drbpbaranwal@gmail.com
authors.forename: Balram Prasad
authors.initials: BP
authors.lastname: Baranwal
authors.forename: Alok Kumar
authors.initials: AK
authors.lastname: Singh
mesh_terms: D000497:Alloys / Q000138:chemical synthesis / Q000737:chemistry; D008024:Ligands; D008670:Metals / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D008954:Models, Biological; D049329:Nanostructures / Q000032:analysis / Q000737:chemistry*; D010316:Particle Size; D010422:Pentanones / Q000737:chemistry; D012545:Schiff Bases / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000497:Alloys; D008024:Ligands; D008670:Metals; D010422:Pentanones; D012545:Schiff Bases; C008790:acetylacetone; D014025:Titanium