TY - JOUR
T1 - Stabilised columnar mesophases formed by 1
T2 - 1 mixtures of hexaalkoxytriphenylenes with a hexaphenyltriphenylene-based polymer
AU - Mclaren, Sholto R.
AU - Tate, Daniel J.
AU - Lozman, Owen R.
AU - Mehl, Georg H.
AU - Bushby, Richard J.
PY - 2015/6/14
Y1 - 2015/6/14
N2 - The synthesis is reported for a main chain polymer in which the repeat units are 2,3,6,7,10,11-hexaphenyltriphenylene moieties linked through flexible dodecyl chains. In compositions with a series of 2,3,6,7,10,11-hexakis(alkoxy)triphenylenes (HATn) this new polymer forms stable hexagonal columnar liquid crystal phases. These are investigated in detail using optical polarised microscopy (OPM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD). In these mixtures, suppression of crystallisation and enhancement of the clearing temperatures leads to very wide liquid crystal ranges: much wider than those for the HATn materials on their own. For the longer chain HATn compounds (n = 12-16) a columnar rectangular phase is also observed. The enhancement of the liquid crystal phase range is attributed to stabilising complementary polytopic interactions between the planar aromatic moieties.
AB - The synthesis is reported for a main chain polymer in which the repeat units are 2,3,6,7,10,11-hexaphenyltriphenylene moieties linked through flexible dodecyl chains. In compositions with a series of 2,3,6,7,10,11-hexakis(alkoxy)triphenylenes (HATn) this new polymer forms stable hexagonal columnar liquid crystal phases. These are investigated in detail using optical polarised microscopy (OPM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD). In these mixtures, suppression of crystallisation and enhancement of the clearing temperatures leads to very wide liquid crystal ranges: much wider than those for the HATn materials on their own. For the longer chain HATn compounds (n = 12-16) a columnar rectangular phase is also observed. The enhancement of the liquid crystal phase range is attributed to stabilising complementary polytopic interactions between the planar aromatic moieties.
UR - http://www.scopus.com/inward/record.url?scp=84930643723&partnerID=8YFLogxK
U2 - 10.1039/c5tc00661a
DO - 10.1039/c5tc00661a
M3 - Article
AN - SCOPUS:84930643723
SN - 2050-7534
VL - 3
SP - 5754
EP - 5763
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 22
ER -