Hockey-stick liquid crystalline 6-oxoverdazyl§

摘要: ABSTRACTA series of hockey-stick shaped 6-oxoverdazyl radicals 1[n]–3[n], containing CH3 (a), CF3 (b) and CN (c) groups in the short ‘arm’, were prepared their physical properties investigated. Mesogenic behaviour was found only derivatives with COO (1[n]c) N=N (2[12]c) linking groups, which exhibited a nematic phase. Analysis binary mixtures selected compounds bent-core host 4[12] gave virtual nematic-isotropic transition temperatures, [TNI], follow order 1[12]b < 1[12]c < 1[12]a one 1[12]c < 2[12]c < (3[12]c) another. The observed effectiveness short-arm substituent, CH3, related to magnitude orientation molecular dipole moment calculated density functional theory methods.