首页|Highly efficient toluene absorption with π-electron donor-based deep eutectic solvents
Highly efficient toluene absorption with π-electron donor-based deep eutectic solvents
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NSTL
The strategy of intensifying toluene absorption with π-electron donor-based deep eutectic solvents (DESs) is first proposed and systematically investigated from the molecular mechanism to absorption performance. A series of DESs with benzyl as a n-electron donor by combining hydrogen bond acceptors (HBAs, i.e., TEBAC, TEAC and TAAC) with hydrogen bond donors (HBDs, i.e., EG, LA and PhOH) are prepared. The absorption performance of toluene in DESs are measured experimentally, and the result demonstrates that TEBAC + PhOH (1:3) has the highest absorption capacity (304 mg/g at 298.15 K) among all the DESs studied in this work. The microscopic mechanism of toluene absorption is explored by ~1HMR and FT-IR spectra and quantum chemical (QC) calculations. The reason that intensifying toluene absorption is the π-electron donor can both enhance the original O-H ππ and C-H ππ interactions of HBD/HBA-toluene and add an extra n-n interaction with toluene. This work provides a theoretical guideline to develop and search task-specific DESs for efficient toluene absorption.
Deep eutectic solventsToluene absorptionπ-electron donorSeparation mechanismQuantum chemical calculation
Chengna Dai、Min Chen、Wenbo Mu
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Faculty of Environment and Life, Beijing University of Technology, 100 Ping Le Yuan, Chaoyang District, Beijing 100124, China
NSTL
