作者:H. Cristina Geiger、Melissa Lamson、Daniel J. Galka
DOI:10.1021/la503954b
日期:2014.11.25
gelators was investigated by circular dichroism (CD), absorption, and fluorescence spectroscopies. The gels obtained from BO4-chol and BO8-chol exhibit biphasic circular dichroism spectra with opposite chirality. The ICD spectra of both BO8-chol and BBO8-chol gels show a positive ICD band followed by a negative band at room temperature. However, while BO8-chol gel ICD absorptions decrease equally as temperature
4-(3-胆固醇氧基羰基丙基氧基)联苯(BO4-chol),4-(7胆固醇氧基羰基庚氧基)联苯(BO8-chol)和4,4'-双(7-胆固醇氧基羰基庚氧基)联苯(BBO8-chol)的合成被报道。这些胶凝剂在正辛醇中形成1%和2%(w / w)的稳定凝胶。由单一胆固醇胶凝剂(BO4-chol和BO8-chol)形成的凝胶的相变温度(T g)(62-65、68-69°C)比从双胆固醇胶凝剂BBO8-chol(96-65)获得的相变温度低(T g)。 98°C)。所有三种胶凝剂在n中形成手性凝胶-辛醇,通过诱导圆二色性(ICD)光谱观察。通过圆二色性(CD),吸收和荧光光谱研究了两个胆固醇部分相对于一个胆固醇单元通过挠性链与联苯分子连接的胆固醇单元的影响,以及链长对这三种新型胶凝剂胶凝能力的影响。 。由BO4-胆甾醇和BO8-胆甾醇获得的凝胶显示出具有相反手性的双相圆二色性光谱。BO8-cho