in isopropyl alcohol according Shreider, Turevskaya, Kozlova, Turova; Izv. Akad. Nauk SSR. Ser. Khim., No.8, 1687-1692 (1981);; recrystd. in i-PrOH;;;

in not given N2 atmosphere;

HNO3 in water; isopropyl alcohol soln. of Zr(OCH(CH3)2)4*(CH3)2CHOH in (CH3)2CHOH added dropwise to H2O at 2°C and pH=1.5 (HNO3); stirred for 10-12 h, colloidal soln. concd. at 35-40°C; dried with N2 stream;

nitric acid in water; isopropyl alcohol Zr(OCH(CH3)2)4*(CH3)2CHOH adissolved in i-PrOH; soln. added dropwise (1 ml/min) to Nanopure H2O (2°C) pH 1.5 (HNO3); stirred (10-12 h); concd. (35-40°C); dried with N2 stream;

in further solvent(s) under N2, ZrCl4 and Zr isopropoxides (2.5:2.0 molar ratio) dissolved in TOPO at 150°C, react. mixt. heated at 400°C with stirring for 3 h; cooled to 60°C, pptd. (acetone), TEM, XPS;