Table 2.
Influence of the structure of IL on an activity of the biocatalyst.
| Structure of the IL/Biocatalyst Name | IL Content in CNTs-IL (wt. %) 1 | IL Content in CNTs-IL (µmol per 1 g of Support) 1 | CALB Content in CNTs-IL-CALB (wt.%) 1 | Yield of n-Butyl Acrylate (%) 2 |
|---|---|---|---|---|
CNTs-[N(CH3)3GlcOCH3][N(Tf)2]-CALB |
1.8 | 34.4 | 4.2 | 99 |
 CNTs-[N(CH3)2(C4H9)GlcOCH3][N(Tf)2]-CALB |
1.6 | 28.8 | 4.2 | 98 |
 CNTs-[bmim][N(Tf)2]-CALB |
1.2 | 28.6 | 1.2 | 95 |
 CNTs-[empyrr][N(Tf)2]-CALB |
0.8 | 20.3 | 1.7 | 95 |
 CNTs-[bmim][N(CN)2]-CALB |
4.0 | 195.1 | 0.2 | 90 |
 CNTs-[bmim][OcSO4]-CALB |
2.6 | 77.8 | 0.9 | 99 |
 CNTs-[emim][OcSO4]-CALB |
2.6 | 81.2 | 1.6 | 99 |
 CNTs-[emim][MeSO4]-CALB |
1.0 | 45.0 | 1.4 | 42 |
 CNTs-[emim][Oc2PO4]-CALB |
1.1 | 25.5 | 2.1 | 99 |
 CNTs-[emim][Me2PO4]-CALB |
1.7 | 72.0 | 0.7 | 89 |
 CNTs-[bmim][Oc2PO4]-CALB |
2.9 | 59.7 | 0.9 | 99 |
 CNTs-[bmim][BF4]-CALB |
1.1 | 50.0 | 1.7 | 41 |
 CNTs-[bmim]Cl-CALB |
3.3 | 187.5 | 0.3 | 63 |
| CNTs-CALB | - | - | 16.5 | 71 |
| Novozyme 435 | - | - | N/A | 74 |
1 determined by TGA; 2 determined by GC; Preparation of CNTs-IL-CALB conditions: 1st step: CNTs 1.0 g, IL 0.5 g, acetonitrile 25 mL; 2nd step: CNTs-IL 1.0 g, 7.5 g CALB, water 30 mL; Reaction conditions: AA 0.072 g (1 mmol), n-BuOH 0.149 g (2 mmol), cyclohexane 1 mL, CNTs-IL-CALB 0.150 g, 24 h, 25 °C, 250 rpm.