Biologically relevant lyotropic liquid crystalline phases in mixtures of n-octyl β-D-glucoside and water. Determination of the phase diagram by fluorescence spectroscopy.
Biologically relevant lyotropic liquid crystalline phases in mixtures of n-octyl β-D-glucoside and water. Determination of the phase diagram by fluorescence spectroscopy.
复制标题
正辛基β-D-葡萄糖苷和水的混合物中的生物学相关的溶致液晶相。
DOI：
10.1021/jp208097c
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Hara,Nagiko
中科院分区：
文献类型：
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作者：
Karukstis,KerryK;Duim,WhitneyC;VanHecke,GeraldR;Hara,Nagiko
当与水混合时，正辛基β-d-葡糖苷形成自组装纳米结构，其中一些是液晶的，并且所有这些都取决于水/葡糖苷的比例和温度。为了实际使用这些相，详细了解它们存在的条件（即，等压相图）。我们使用荧光的染料分子prodan作为一种新的方法来探测这些混合物中形成的阶段。普罗丹荧光信号取决于其环境的极性，从而取决于染料存在的相。总荧光信号的视觉检查可以定性地确定存在的相，包括共存相。温度引起的相位变化也检测到从普罗丹荧光光谱中观察到的变化。这种新技术的灵敏度允许单相和多相区域被仔细映射的第一次。
When mixed with water,n-octyl β-d-glucoside forms self-assembled nanostructures, several of which are liquid crystalline and all of which depend on the water/glucoside ratio and temperature. For practical use of these phases, a detailed understanding of the conditions under which they exist (i.e., the isobaric phase diagram) is required. We use the fluorescence of the dye molecule prodan as a new approach to probe the phases formed in these mixtures. The prodan fluorescence signal depends on the polarity of its environment and thus the phase(s) in which the dye exists. Visual inspection of the total fluorescence signal can qualitatively determine the phases present, including coexisting phases. Temperature-induced phase changes are also detected from variations observed in the prodan fluorescence spectrum. The sensitivity of this new technique allows the single- and multiple-phase regions to be mapped carefully for the first time.