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Tuning of Delicate Host–Guest Interactions in Hydrated MIL‐53 and Functional Variants for Furfural Capture from Aqueous Solution
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-10-06 , DOI: 10.1002/anie.202011678
Weishen Yang 1 , Na Cao 2 , Honglei Wang 3 , Yujie Ban 4 , Yuecheng Wang 5 , Kun Yang 5 , Yingwu Zhou 5 , Meng Zhao 5 , Weiqiao Deng 3
Affiliation  

Capture of high‐boiling‐point furfural from diluted aqueous solution is a critical but challenging step in sustainable bio‐refinery processes, but conventional separation methods such as distillation and liquid‐liquid extraction requires prohibitive energy consumption. We report control over the microenvironment of hydrated MIL‐53 and isoreticular variants with diversified functional terephthalic acid linkers for the purpose of preferential binding of furfural through delicate host‐guest interactions. Methyl‐bounded MIL‐53 with improved binding energy in the hydrated form results in highly efficient capture ratio (ca. 98 %) in the extremely low concentration of furfural solution (0.5–3 wt %) and 100 % furfural specificity over xylose. The distinct hydrogen bonding sites and multiple Van de Wall interactions for furfural adsorption was testified by computational modeling. Furthermore, the recovery ratio of furfural reaches ca. 93 % in desorption.

中文翻译:

水合MIL-53中微妙的宿主与客体之间的相互作用以及水溶液中糠醛捕获的功能变体的优化

从稀释的水溶液中捕获高沸点糠醛是可持续的生物精炼过程中的关键但具有挑战性的一步,但是常规分离方法(例如蒸馏和液-液萃取)要求消耗大量能量。我们报告了对水合MIL-53和同网状变体与多样化功能对苯二甲酸接头的微环境的控制,目的是通过精细的宿主-客体相互作用优先结合糠醛。甲基结合的MIL-53以改进的水合形式的结合能,在极低的糠醛溶液浓度(0.5-3 wt%)和100%的糠醛特异性(相对于木糖)的情况下,可实现高效捕获率(约98%)。计算模型证明了不同的氢键结合位点和糠醛吸附的多个Van de Wall相互作用。此外,糠醛的回收率达到约。解吸93%。
更新日期:2020-10-06
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