A new functionalized porous organic polymer bearing sulfonic acid groups (PDVTA-SO₃H) at the pore surface with high surface area (S_BET = 406 m² g⁻¹) and Brønsted acidity is reported. The material has been synthesized via post-synthetic sulfonation of the porous co-polymer poly-divinylbenzene-co-triallylamine (PDVTA-1) using chlorosulfonic acid as sulfonating agent. A detailed characterization of the SO₃H functionalized porous polymeric material has been carried out using N₂ sorption, FT-IR and UV–vis spectroscopy, HR-TEM, FE-SEM, thermogravimetric and elemental analyses. Temperature programmed desorption of NH₃ (TPD-NH₃ analysis) of PDVTA-SO₃H revealed a very high surface acidity of 2.3 mmol  g⁻¹. Such high acidity of PDVTA-SO₃H has been explored to investigate its catalytic efficiency towards eco-friendly production of biodiesel via esterification of long-chain free fatty acids (FFA) to the respective fatty acid monoalkyl esters (FAMEs) at room temperature using methanol as reactant as well as solvent. The sulfonated porous polymer is found to be a very active and reusable solid acid catalyst giving high yields (∼92–98%) of various biodiesel compounds under very mild reaction conditions.

中文翻译：

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磺化多孔有机聚合物作为室温下生物柴油合成的高效催化剂

报道了一种新的官能化的多孔有机聚合物，其在具有高表面积（S _BET  = 406 m ²  g ^-1）和布朗斯台德酸度的孔表面上带有磺酸基团（PDVTA-SO ₃ H）。该材料是使用氯磺酸作为磺化剂，通过多孔共聚物聚二乙烯基苯-共-三烯丙基胺（PDVTA-1）的后合成磺化反应合成的。使用N ₂吸附，FT-IR和UV-vis光谱，HR-TEM，FE-SEM，热重和元素分析对SO ₃ H官能化多孔聚合物材料进行了详细的表征。程序升温的NH ₃脱附（TPD-NHPDVTA-SO ₃ H的₃分析显示出2.3mmol g ^-1的非常高的表面酸度。已经研究了如此高的PDVTA-SO ₃ H酸度，以研究其在室温下使用长链游离脂肪酸（FFA）酯化为相应的脂肪酸单烷基酯（FAME）的方式对生态友好型生产生物柴油的催化效率。甲醇作为反应物和溶剂。发现磺化的多孔聚合物是一种非常活泼且可重复使用的固体酸催化剂，在非常温和的反应条件下，可产生高产率（约92–98％）的各种生物柴油化合物。