Synthesis of optically clear molecular organogels using phenol and a sulfosuccinic surfactant in various solvents with cyclic geometries
Synthesis of optically clear molecular organogels using phenol and a sulfosuccinic surfactant in various solvents with cyclic geometries
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DOI：
10.1016/j.molliq.2018.07.091
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发表时间：
2018-10
影响因子：
6
通讯作者：
K. Nishiyama;Masaru Kinoshita;Takashi Harada;Yukiteru Katsumoto
中科院分区：
文献类型：
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作者：
K. Nishiyama;Masaru Kinoshita;Takashi Harada;Yukiteru Katsumoto
已知对氯苯酚和磺基琥珀酸表面活性剂双（2-乙基己基）磺基琥珀酸酯（AOT）的等浓度混合物在环状有机溶剂如环己烷中形成光学透明的凝胶，而在具有相同胶凝因子的无环烷烃和芳族溶剂中获得浑浊的凝胶。当发射装置分散在凝胶内时，透明的有机凝胶是必需的。因此，在本研究中，我们使用了16种环状溶剂，包括环状烷烃、环状烯烃、环烷酮和氯代环己烷。最终，我们在凝胶化后立即在12种环烷烃和环烯烃溶剂中获得透明凝胶，而这些凝胶中的2种在几天内变得浑浊。环状溶剂的几何形状被证明是不必要的，以获得透明的凝胶。透射光谱，滴点温度，和核磁共振表征的有机凝胶。由于π-堆叠结构的刚性，邻氯苯酚分子自组装后的滴点较高。
Equal concentration mixtures ofp-chlorophenol and a sulfosuccinic surfactant bis(2-ethylhexyl)sulfosuccinate (AOT) are known to form optically clear gels in cyclic organic solvents like cyclohexane, whereas turbid gels are obtained in acyclic alkanes and aromatic solvents with the same gelators. Clear organogels are necessary when emitting devices are dispersed inside the gel. As such, in this study, we employed 16 cyclic solvents including cyclic alkanes, cyclic alkenes, cycloalkanones, and chlorocyclohexane. Eventually we were to obtain clear gels in 12 cyclic alkane and cyclic alkene solvents at immediately after the gelation, while 2 of those gels turned out to be turbid in a few days. A cyclic solvent geometry was shown to be unnecessary to obtain clear gels. Transmittance spectra, drop-point temperature, and nuclear magnetic resonance were employed to characterize the organogels. The rigid structure in the π-stack caused byp-chlorophenol self-assembly brought about a higher drop point.