First triphenylene based non-symmetric donor–acceptor triple mesogen possessing disc-like and rod-like characteristics

Discotic liquid crystalline tris(hexahexyloxytriphenylene)triazines with separate columns of triphenylene and triazine cores

“…Normally, electron-deficient and electron-rich moieties tend to form mixed columns, as is found, for example, in trinitrofluorenone-triphenylene mixtures. [12,30,31] So, the current system indicates that it is possible to obtain well-ordered columnar phases with parallel hole and electron-conducting pathways. This ordering is of significant interest in, e.g., solar cell or other optoelectronic applications.…”

“…[8,9] Recently, triphenylene oligomers have obtained much attention from various research groups. [10][11][12][13][14][15][16][17][18] For example, Kumar and co-workers synthesised 1,3,5-trisubstituted benzenes to which three triphenylene moieties were attached via flexible chains. [10] Paraschiv et al [14,15] described a series of 1,3,5-benzenetrisamide derivatives with hexaalkoxytriphenylene (HAT) groups at the periphery.…”

“…may afford a more promising strategy to obtain materials with columns in which both moieties are present in different columns. Although several oligomers [10][11][12][13][14][15][16][17][18]20] with different aromatic groups have been investigated, only a few examples are known in which columns of different moieties are present. These include materials in which stabilisation in one column was obtained through intermolecular hydrogen bonding.…”

Synthesis of disk-rod-disk liquid crystal trimers by using click chemistry

“…5a shows two intense peaks corresponding to d spacing values of 18.83 Å and 16.27Å close to the 2 value of 5°. Therefore, we regarded that the (10) peak of the Col h mesophase split in the (20) and (11) reflection of the Col r phase. The mesophase of 5a may involve mixed columnar packing arrangements.…”

“…Several triphenylene discotic liquid crystal dimers, oligomers and polymers have been synthesized [6][7][8]. Triphenylene discotic liquid crystal trimers are molecules containing three mesogenic units joined by two flexible spacers [9][10][11][12]. The physical properties of liquid crystal trimers are different from those of conventional calamitic or discotic liquid crystals.…”