Table 1 Transition temperatures, associated enthalpies* and lattice parameter of compounds 1a–1d and 2a.

From: Arrays of giant octagonal and square cylinders by liquid crystalline self-assembly of X-shaped polyphilic molecules

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No.

m

n

T/°C

a /nm (T/°C)

1a

12

10

Cr1 48 Cr2 81 Colsqu/p4gm 112 M 114 Iso

9.37 (100)

   

11.713.42.40.4

 

1b

12

12

Cr1 50 Cr2 78 Colsqu/p4gm 116 M 118 Iso

9.67 (95)

   

5.68.72.30.6

 

1c

12

14

Cr1 38 Cr2 84 Colsqu/p4gm 114 Iso

9.79 (90)

   

5.415.32.7

 

1d

12

16

Cr 90 Colsqu/p4gm 111 Iso

9.83 (100)

   

16.7 2.2

 

2a

10

10

Cr 72 Colhex/p6mm 122 Iso

4.00 (100)

   

2.2 2.0

 
  1. Cr1, Cr2, Cr, crystalline solid; Colsqu/p4gm, square columnar phase with plane group p4gm (giant octagon–square cylinder phase); Colhex/p6mm, hexagonal columnar phase (hexagonal cylinder phase); Iso, isotropic liquid; M, unknown mesophase.Associated enthalpies are given on the lower lines (in italics) and are determined by DSC (peak temperatures in first heating scan, 10 K min−1).
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