Journal ArticleDOI
Chemical modification of alkoxide precursors
TLDR
In this paper, the most common chemical additives used in the sol-gel process are explained in terms of chemical reactivity, and the most important parameters appear to be the reactivity of the new ligand towards hydrolysis, the charge distribution in the new molecular precursor and the coordination numbers of the metal atom.Abstract:
The chemical reactivity of metal alkoxides offers a broad range of possibilities for chemical modification of these molecular precursors. The whole hydrolysis-condensation process may then be completely different leading to new products. An analysis is presented concerning some of the most common chemical additives used in the sol-gel process. Their role is explained in terms of chemical reactivity. The most important parameters appear to be the reactivity of the new ligand towards hydrolysis, the charge distribution in the new molecular precursor and the coordination numbers of the metal atom.read more
Citations
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Sol-gel chemistry of transition metal oxides
TL;DR: In this paper, the preparation of a colloidal colloidal by un procede sol gel is described, and a procedure for determination des proprietes electriques et electrochimiques is described.
Journal ArticleDOI
Chemical strategies to design textured materials: from microporous and mesoporous oxides to nanonetworks and hierarchical structures.
Abstract: 3.
Journal ArticleDOI
Designed Hybrid Organic−Inorganic Nanocomposites from Functional Nanobuilding Blocks
Clément Sanchez,G. J. de A. A. Soler-Illia,François Ribot,Thierry Lalot,Cédric R. Mayer,Valérie Cabuil +5 more
TL;DR: In this paper, the core integrity of inorganic nanobuilding blocks (NBBs) is preserved and the main synthetic procedures presented in the literature are reviewed and extended to nanoparticule-based hybrid networks.
Journal ArticleDOI
Hybrid organic–inorganic materials: a land of multidisciplinarity
TL;DR: In this article, a review of some chemistry pathways to hybrid materials is presented, where the nature of the bonds between organic and inorganic phases is used to divide them in two major families: class I corresponds to materials with weak interphase bonding, while class II correspond to materials where both phases are chemically grafted.
Journal ArticleDOI
Hierarchically porous materials: synthesis strategies and structure design
Xiao-Yu Yang,Li-Hua Chen,Yu Li,Joanna C. Rooke,Clément Sanchez,Bao-Lian Su,Bao-Lian Su,Bao-Lian Su +7 more
TL;DR: This review addresses recent advances made in studies of hierarchically porous materials and methods to control their structure and morphology and hopes that this review will be helpful for those entering the field and also for those in the field who want quick access to helpful reference information.
References
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Journal ArticleDOI
Theory of Molecular Size Distribution and Gel Formation in Branched‐Chain Polymers
TL;DR: The most probable distributions of molecular sizes are calculated for certain types of branched-chain polymers in this paper, which represent an extension of the previous work of Flory, who showed that very large polymeric molecules appear suddenly at a critical extent of reaction, which is predicted to occur very nearly at the experimentally observed gel point.
Book ChapterDOI
Better Ceramics Through Chemistry
TL;DR: In this article, the authors apply polymeric network theory to the design of gel ultrastructures and apply scaling calculations based on molecular orbital calculations for prediction of the silanol polymerization mechanism.
Journal ArticleDOI
Ultrastructure processing of ceramics, glasses, and composites
D.R. Uhlmann,Donald R. Ulrich +1 more
TL;DR: In this paper, the state of the science of producing ceramic, glass, and composite materials using the new methods of chemical micromorphology, and transformation based processing, along with practical applications is examined.
Journal ArticleDOI
Hydrolysis of titanium alkoxides: modification of the molecular precursor by acetic acid
TL;DR: In this paper, it was shown that bidentate acetates replace the OR groups and are directly bounded to the titanium, leading to Ti(OR) x (Ac) y. oligomers.