Self-Assembly of Bridged Silsesquioxanes: Modulating Structural Evolution via Cooperative Covalent and Noncovalent Interactions
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- 作者：Gaelle Creff ; Beno卯t P. Pichon ; Christophe Blanc ; David Maurin ; Jean-Louis Sauvajol ; Carole Carcel ; Jo毛l J. E. Moreau ; Pascale Roy ; John R. Bartlett ; Michel Wong Chi Man ; Jean-Louis Bantignies
- 刊名：Langmuir
- 出版年：2013
- 出版时间：May 7, 2013
- 年：2013
- 卷：29
- 期：18
- 页码：5581-5588
- 全文大小：452K
- 年卷期：v.29,no.18(May 7, 2013)
- ISSN：1520-5827
文摘
The self-assembly of a bis-urea phenylene-bridged silsesquioxane precursor during sol鈥揼el synthesis has been investigated by in situ infrared spectroscopy, optical microscopy, and light scattering. In particular, the evolution of the system as a function of processing time was correlated with covalent interactions associated with increasing polycondensation and noncovalent interactions such as hydrogen bonding. A comprehensive mechanism based on the hydrolysis of the phenylene-bridged organosilane precursor prior to the crystallization of the corresponding bridged silsesquioxane via H-bonding and subsequent irreversible polycondensation is proposed.