- Self-Assembly of Bridged Silsesquioxanes: Modulating Structural Evolution via Cooperative Covalent and Non-covalent Interactions doi link

Auteur(s): Creff Gaëlle, Pichon Benoît P., Blanc C., Maurin D., Sauvajol J.-L., Carcel Carole, Moreau Joël, Roy Pascale, Bartlett John R., Wong Chi Man Michel, Bantignies J.-L.(Corresp.)

(Article) Publié: Langmuir, vol. 29 p.5581 (2013)

Ref HAL: hal-00819327_v1
DOI: 10.1021/la400293k
WoS: 000318756200025
Exporter : BibTex | endNote
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The self-assembly of a bis-urea phenylene-bridged silsesquioxane precursor during sol-gel 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 non-covalent 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.