Autor: Burglova, K.; Noureddine, A.; Hodacova, J.; Toquer, G.; Cattoen, X.; Wong Chi Man, M.
Název práce v češtině: Příprava přemostěných organosilanů s volnými funkčními skupinami a mezoporézními organosilikáty
Název práce v angličtině: A General Method for Preparing Bridged Organosilanes with Pendant Functional Groups and Functional Mesoporous Organosilicas
Studentská publikace: ne
Klíčová slova v češtině: sol-gel, přemostěné organosilany, click reakce
Klíčová slova v angličtině: sol-gel, bridged organosilane, click reaction
Abstrakt česky: New organosilica precursors containing two triethoxysilyl
groups suitable for the organosilica material formation
through the sol-gel process were designed and synthesised.
These precursors display alkyne or azide groups for
attaching targeted functional groups by copper-catalysed
azide–alkyne cycloaddition (CuAAC) and can be used for the
preparation of functional organosilicas following two strategies:
1) the functional group is first appended by CuAAC
under anhydrous conditions, then the functional material is
prepared by the sol-gel process; 2) the precursor is first subjected
to the sol-gel process, producing porous, clickable
bridged silsesquioxanes or periodic mesoporous organosilicas
(PMOs), then the desired functional groups are attached
by means of CuAAC. Herein, we show the feasibility of both
approaches. A series of bridged bis(triethoxysilane)s with different
pending organic moieties was prepared, demonstrating
the compatibility of the first approach with many functional
groups. In particular, we demonstrate that organic
functional molecules bearing only one derivatisation site can
be used to produce bridged organosilanes and bridged silsesquioxanes.
In the second approach, clickable PMOs and
porous bridged silsesquioxanes were prepared from the
alkyne- or azide-containing precursors, and thereafter, functionalised
with complementary model azide- or alkyne-containing
molecules. These results confirmed the potential of
this approach as a general methodology for preparing functional
organosilicas with high loadings of functional groups.
Both approaches give rise to a wide range of new functional
organosilica materials.
Abstrakt anglicky: New organosilica precursors containing two triethoxysilyl
groups suitable for the organosilica material formation
through the sol-gel process were designed and synthesised.
These precursors display alkyne or azide groups for
attaching targeted functional groups by copper-catalysed
azide–alkyne cycloaddition (CuAAC) and can be used for the
preparation of functional organosilicas following two strategies:
1) the functional group is first appended by CuAAC
under anhydrous conditions, then the functional material is
prepared by the sol-gel process; 2) the precursor is first subjected
to the sol-gel process, producing porous, clickable
bridged silsesquioxanes or periodic mesoporous organosilicas
(PMOs), then the desired functional groups are attached
by means of CuAAC. Herein, we show the feasibility of both
approaches. A series of bridged bis(triethoxysilane)s with different
pending organic moieties was prepared, demonstrating
the compatibility of the first approach with many functional
groups. In particular, we demonstrate that organic
functional molecules bearing only one derivatisation site can
be used to produce bridged organosilanes and bridged silsesquioxanes.
In the second approach, clickable PMOs and
porous bridged silsesquioxanes were prepared from the
alkyne- or azide-containing precursors, and thereafter, functionalised
with complementary model azide- or alkyne-containing
molecules. These results confirmed the potential of
this approach as a general methodology for preparing functional
organosilicas with high loadings of functional groups.
Both approaches give rise to a wide range of new functional
organosilica materials.
Jazyk v originále: angličtina
Název časopisu: Chem. Eur. J.
Rok: 2014
Svazek (ročník): 20
Číslo časopisu v rámci uvedeného svazku: 33
Strana od-do: 10371-10382

Q1: ne

ISSN časopisu: 0947-6539
Vydavatel: Wiley-VCH Verlag GmbH & Co. KGaA
Způsob financování: French embassy in Prague