Materials and Methods. TiCl4 was obtained from Sigma and used as received. TiCl4 solution was prepared by diluting from a 2 M stock solution, which was prepared via hydrolysis of 99% TiCl4 in a subzero ice bath by adding concentrated TiCl4 dropwise while stirring. Glacial acetic acid and 200 proof ethanol were obtained from Fisher and used as received.