期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 3, 期 8, 页码 1715-1723出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.5b00238
关键词
Biodiesel; Esterification/trans-esterification reaction; Porous organic polymer; Sulfonation; Surface acidity
资金
- CSIR, New Delhi
- DST, New Delhi
New pyrene-based microporous organic polymers PPOP-1, PPOP-2, and PPOP-3 have been synthesized via Friedel-Crafts alkylation reaction between pyrene and bis(1,4-dibromomethyl)benzene at their different molar ratios in the presence of a Lewis acid catalyst FeCl3 under refluxing conditions. Pore surfaces of PPOP-1, PPOP-2, and PPOP-3 have been functionalized by -SO3H groups via chlorosulfonic acid treatment under controlled reaction conditions to obtain sulfonated porous organic polymers, and these are designated as SPPOP-1, SPPOP-2, and SPPOP-3, respectively. Powder X-ray diffraction, N-2 sorption, HR-TEM, FE-SEM, NH3-TPD, solid state C-13 CP MAS-NMR, and FT-IR spectroscopic tools are employed to characterize these materials. These sulfonated porous polymers showed nanofiber-like or spherical morphology, very high surface acidity, and excellent catalytic activity for the synthesis of biodiesels via esterification/transesterification of long chain fatty acids/esters at room temperature together with very high recycling efficiency, suggesting the future potential of these sulfonated porous polymers in a wide range of sustainable acid-catalyzed chemical reactions.
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