Synthesis and characterization of new heteroleptic derivatives of titanium(IV) derived from 2-hydroxy-4-methoxy-benzophenone : A new precursors for the synthesis of nano sized titania

Materials Chemistry Division, School of Advanced Sciences, VIT University, Vellore-632 014,

Tamilnadu, India

E-mail : madhveshpathak@vit.ac.in

Department of Advanced Materials Engineering for Information and Electronics, College of Engineering,

Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea

E-mail : kjkim@khu.ac.kr

A few new titanium(IV) complexes have been synthesized by the reaction among precursor (Bp)₂Ti(OPrⁱ)₂ with different alkoxyalkanols and phenols/substituted phenols in 1 : 1 : 1 molar ratios in boiling toluene as mono nuclear heteroleptic titanium complexes of the type [(Bp)₂Ti(L₁OR)(L₂X)] (3a-c) (where Bp = 2-hydroxy-4-methoxy-benzophenone, L1 = -O-CH₂ -CH₂ -; R = CH₃ , C₂H₅ ; L₂ = phenol, X = H or OCH₃ ). The newly prepared complexes were characterized by various physico-chemical techniques such as elemental analysis, mass, UV, FTIR and NMR (¹H and ¹³C). The mass spectra of the newly synthesized derivatives indicate their monomeric nature. Based on spectral studies cis hexacoordinated geometry around titanium(IV) has been proposed. By employing sol-gel techniques to all the molecules, nano sized titania was produced at 600 ºC. Powder XRD analysis confirmed the formation of a mixed phase (anatase and rutile).