Nano-sized, quaternary titanium(IV) metal-organic frameworks with multidentate ligands

作者：Baranwal Balram Prasad^*; Singh Alok Kumar

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2010, 77(5): 938-941.

DOI：10.1016/j.saa.2010.08.022

• Titanium(IV)
• Nano-sized
• Multidentate ligands
• Mononuclear

Some mononuclear nano-sized, quaternary titanium(IV) complexes having the general formula [Ti(acac)(OOCR)(2)(SB)1 (where Hacac = acetylacetone, R=C(15)H(31) or C(17)H(35), HSB = Schiff bases) have been synthesized using different multidentate ligands. These were characterized by elemental analyses, molecular weight determinations and spectral (FTIR, (1)H 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 alpha, beta, gamma 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.

• 出版日期2010-12