Table 3 Product yields for the reaction between acetylacetone and aniline

From: Nucleation of quartz under ambient conditions

Silica phase added as a potential catalyst

% Yield of product, 4-(phenylamino)-pent-3-en-2-onea

 

4 h

5 h

6 h

7 nm fumed silica

70±1

76±2

81±2

200–300 nm fumed silica

59

67

74

Microemulsion-synthesized nanoquartz

45±5

54±4

60±4

Microemulsion-synthesized nanoquartz, excess (100 μl) SB surfactant mixture

47.4

54.9

61.3

Quartz standard with mean crystal size ≈350 μm by mass

31.9

42.4

53.8

None

31±2

42±4

52±5

1-day hydrothermal nanoquartz

8±1

12±4

16±6

5-day hydrothermal nanoquartz

11±4

15±4

19±6

6-day hydrothermal nanoquartz

18±1

25±1

32±1

7-day hydrothermal nanoquartz

3.9±0.1

5.2±0.2

7.1±0.5

7-day hydrothermal nanoquartz, 300% excess aniline

10.5

11.3

13.1

7-day hydrothermal nanoquartz, 300% excess acetylacetone

25.4

40.5

53.2

Control 1-day hydrothermal quartz

9.2

13.5

17.6

Control 5-day hydrothermal quartz

12.9

19.3

26.1

Control 6-day hydrothermal quartz

15.8

26.5

38.3

Control 7-day hydrothermal quartz

24.7

36

47.6

  1. aExperiments showing standard deviations were repeated at least twice. Values without standard deviations were from single experiments. The 7 nm fumed silica and no catalyst experiments were performed in each batch of experiments to ensure reproducibility of results.
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