Journal
CHEMCATCHEM
Volume 11, Issue 1, Pages 538-549Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201801247
Keywords
Spirobifluorene; porous organic polymers (POPs); Pd/POP catalyst; Pt/POP catalyst; hydrogenation of 4-nitrostyrene; 4-bromobenzophenone; acetophenone; 7-nitro-1-tetralone; 1,2-naphtoquinone
Categories
Funding
- CNCS/CCCDI-UEFISCDI [PN-III-P2-2.1-PED-2016-0349]
Ask authors/readers for more resources
Spirobifluorene-based porous organic polymers (POP) were synthesized following two different protocols; the acetylenic coupling reaction conditions and the Sonogashira cross-coupling reaction. These were utilized as support for the hydrogenation of a series of species containing unsaturated C=C and C=O bonds (4-nitrostyrene, 4-bromobenzophenone, acetophenone, 7-nitro-1-tetralone and 1,2-naphtoquinone confirmed their efficiency). POP1 prepared via a copper-catalysis protocol was completely inactive, while POP2-4 containing residual Pd exhibited different activities in accordance to the accessibility of the substrates to the metal. Further deposition of 0.5wt% Pd led to active and stable catalysts. They were easily separated by filtration, and after re-dispersion, afforded the same performances for ten successive cycles. This study also evidenced the specific role of the support in these reactions by comparing the behavior of Pd/POP with that of a Pd/C catalyst with the same loading of palladium. The deposition of Pt on these supports led to sub-nanometric particles and, in accordance, to a different catalytic behavior reflected merely by differences in the selectivity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available