作者:Daniel J. Price、Kimberley Willis、Tim Richardson、Goran Ungar、Duncan W. Bruce
DOI:10.1039/a700575j
日期:——
Three series of hydrogen bonded adducts have been formed between
4-alkoxy-4′-stilbazoles and the nitrophenols
4-nitrophenol, 3-nitrophenol and 2,4-dinitrophenol. Each series is
mesomorphic displaying both nematic and smectic A phases, in sharp
contrast to the behaviour of the individual components. The binary phase
behaviour of mixtures of 3-nitrophenol and 4-octyloxystilbazole is
reported, and gives conclusive evidence for the formation of a one-to-one
hydrogen bonded adduct. Electronic spectroscopy of
2,4-dinitrophenol/decyloxystilbazole was very informative and showed that
the higher energy, ionic hydrogen bonded state, corresponding to proton
transfer, was significantly populated through the mesophase, and that the
mesophase provides an additional stabilisation for this
state.
4-alkoxy-4′-stilbazoles 与硝基苯酚 4-硝基苯酚、3-硝基苯酚和 2,4-二硝基苯酚之间形成了三个氢键加合物系列。每个系列都是介形的,显示出向列和共晶 A 相,与单个成分的行为形成鲜明对比。报告了 3-硝基苯酚和 4-辛氧基苯并唑混合物的二元相行为,并提供了形成一对一氢键加合物的确凿证据。2,4-dinitrophenol/decyloxystilbazole 的电子光谱信息量很大,表明能量较高的离子氢键态(与质子转移相对应)在介相中大量存在,而且介相为这种态提供了额外的稳定性。