Post‐Synthesis Grafting of Fluoropropyl Groups on SBA‐15 Type Ordered Mesoporous Silica

Abstract

The post-synthesis grafting of fluoroalkyl groups has been performed to modulate the hydrophilic-hydrophobic balance of SBA-15 type ordered mesoporous silica (OMS). The influence of the nature of the grafting agent and its structural and textural characteristics and the silanol content of the starting[a] Equipe Matériaux à Porosité Contrôlée

High azobenzene functionalization enhances stability of the cis isomer: Periodic mesoporous organosilica network on the way to new light triggered applicable materials

“…[44,45,47] In addition, silanol groups are present on the pore wall surfaces [48,49] which are usable for post-synthetically grafting. [50-54] A large number of organic linkers for the generation of PMOs can be envisaged [55][56][57][58], leading to a large variety of functionalities for distinct applications.…”

“…[44,45,47] In addition, silanol groups are present on the pore wall surfaces [48,49] which are usable for post-synthetically grafting. [50-54] A large number of organic linkers for the generation of PMOs can be envisaged [55][56][57][58], leading to a large variety of functionalities for distinct applications.Attractive molecules for a post-synthetic functionalization of PMOs are azobenzene based molecules.[59-71] The photo induced trans to cis isomerization proceeds using light with a wavelength of about 365 nm, and the reverse isomerization is easily induced by light of longer wavelength (λ ≈ 455 nm) or by heat. [60,61,72] The isomerization is accompanied by a change of the dipole moments[59] with the value of the dipole moment depending on the azobenzene derivative applied.…”