Quantifying the efficiency of CO2 capture by Lewis pairs. Issue 4 (2nd March 2017)

• Record Type: Journal Article
• Authors: Chi, Jay J.; Johnstone, Timothy C.; Voicu, Dan; Mehlmann, Paul; Dielmann, Fabian; Kumacheva, Eugenia; Stephan, Douglas W.
• Is Part Of: Chemical science. Volume 8:Issue 4(2017)
• Page Start: 3270
• Page End: 3275
• Publication Date: 2017-03-02
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6sc05607e
• Languages: English
• ISSNs: 2041-6520

Abstract

Abstract : A microfluidic strategy is used to assess the relative efficiency and thermodynamic parameters of CO2 binding by three Lewis acid/base combinations. Abstract : A microfluidic strategy has been used for the time- and labour-efficient evaluation of the relative efficiency and thermodynamic parameters of CO2 binding by three Lewis acid/base combinations, where efficiency is based on the amount of CO2 taken up per binding unit in solution. Neither t Bu3 P nor B(C6 F5 )3 were independently effective at CO2 capture, and the combination of the imidazolin-2-ylidenamino-substituted phosphine (NI i Pr)3 P and B(C6 F5 )3 was equally ineffective. Nonetheless, an archetypal frustrated Lewis pair (FLP) comprised of t Bu3 P and B(C6 F5 )3 was shown to bind CO2 more efficiently than either the FLP derived from tetramethylpiperidine (TMP) and B(C6 F5 )3 or the highly basic phosphine (NI i Pr)3 P. Moreover, the proposed microfluidic platform was used to elucidate the thermodynamic parameters for these reactions.