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Cover Feature: Water Formation in Non‐Hydrolytic Sol–Gel Routes: Selective Synthesis of Tetragonal and Monoclinic Mesoporous Zirconia as a Case Study (Chem. Eur. J. 8/2021)
Author(s) -
Wang Yanhui,
Bouchneb Maroua,
Mighri Rimeh,
Alauzun Johan G.,
Mutin P. Hubert
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202004193
Subject(s) - diisopropyl ether , monoclinic crystal system , cubic zirconia , hydrolysis , tetragonal crystal system , benzyl alcohol , mesoporous material , acetic anhydride , acetone , chemistry , ether , materials science , organic chemistry , polymer chemistry , catalysis , crystal structure , ceramic
Water in non‐hydrolytic sol‐gel : In situ water formation during the synthesis of mesoporous zirconia has been systematically investigated. Significant amounts of water were found in several cases, notably in the reactions of Zr(O n Pr) 4 with ketones and of ZrCl 4 with alcohols or acetone. Conversely, the reactions of Zr(O n Pr) 4 with acetic anhydride or benzyl alcohol at moderate temperature (200 °C) and of ZrCl 4 with diisopropyl ether were strictly non‐hydrolytic. Water played a major role on the structure of the final zirconia: tetragonal ZrO 2 was favored in strictly non‐hydrolytic routes, while monoclinic ZrO 2 was favored in the presence of water. More information can be found in the Full Paper by P. H. Mutin et al. on page 2670.