Molecular Gels and their Fibrillar Networks - Soft Fibrillar Materials: Fabrication and Applications - page 11

h

b i

a

c

d

f

e

g

C 16 H 33

O

55 ° C

OH

C 16 H 33

N

O

C 16 H 33

O e

45 ° C

i

O

13

c b

N O

g

C 16 H 33 HO

d

f h

35 ° C

O

C 16 H 33

a

10

25 ° C

9.5 9.0 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0
ppm (a) (b)

55 ◦ C). Reprinted with permission from Ref.
[60b]. Copyright 2009 American Chemical
Society.

Figure 1.8 (a) Structure of gelator 10 .(b)
Variable temperature 1 H NMR spectra of 10
mg/ml 10 in C 6 D 6 in its gel phase (25 and
35 ◦ C) and its solution/sol phase (45 and

H

(a)

i

H i
H

H

g

O H

N

O H

a c

H

f

I

H

O N

N

e

H m

H O O

b

H d

11

H c

(c)

(b)

100˚C
90˚C
80˚C
70˚C
60˚C
50˚C
48˚C
46˚C
44˚C
42˚C
40˚C
37˚C
35˚C
30˚C
25˚C

100˚C
90˚C
80˚C
70˚C
60˚C
50˚C
48˚C
46˚C
44˚C
42˚C
40˚C
37˚C
35˚C
30˚C
25˚C

H

H a H CH 2 b f

8

9 8 7 6 5 4 9

ppm

Figure 1.9 (a) Structure of leucine-based
gelator 11 . (b) Superimposition of 1 wt% 11
in toluene- d 8 1 H NMR spectra at different
temperatures (diphenylmethane as internal
standard). (c) Change of signals from the

two H c protons upon heating (in the rect-
angle). Intensities are normalized. Reprinted
with permission from Ref. [61c]. Copyright
2010 American Chemical Society.