On the contrary, sample 3 does not form this mixed columnar liquid crystalline
structures. As shown in Fig. 4, many reflections are seen in the one-dimensional
(1D) XRD profiles below the isotropization temperature (T i ). From the
two-dimensional (2D) XRD pattern, the structure can be assigned as an ordered
rectangular columnar (Col ro ) structure, with the unit cell dimensions: a = 5.03 nm,
b = 4.30 nm, and c = 0.35 nm. These unit cell dimensions are much larger than
individual Tp or Pc columns but nearly the same size as the dimension of the entire
Fig. 3 Temperature-dependent 1D XRD profiles and 2D XRD patterns on shear-oriented Pc(Tp) 4 :
(a) sample 1, (b) sample 2, and (c) sample 4 (Miao and Zhu 2010a)
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structures. As shown in Fig. 4, many reflections are seen in the one-dimensional
(1D) XRD profiles below the isotropization temperature (T i ). From the
two-dimensional (2D) XRD pattern, the structure can be assigned as an ordered
rectangular columnar (Col ro ) structure, with the unit cell dimensions: a = 5.03 nm,
b = 4.30 nm, and c = 0.35 nm. These unit cell dimensions are much larger than
individual Tp or Pc columns but nearly the same size as the dimension of the entire
Fig. 3 Temperature-dependent 1D XRD profiles and 2D XRD patterns on shear-oriented Pc(Tp) 4 :
(a) sample 1, (b) sample 2, and (c) sample 4 (Miao and Zhu 2010a)
8 Supramolecular Self-Assembly of Discotic Liquid Crystalline LEGOs
223