Lyotropic phase behaviour of n-octyl-1-O-β-D-glucopyranoside and its thio derivative n-octyl-1-S-β-D-glucopyranoside
Lyotropic phase behaviour of n-octyl-1-O-β-D-glucopyranoside and its thio derivative n-octyl-1-S-β-D-glucopyranoside
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n-辛基-1-O-β-D-吡喃葡萄糖苷及其硫代衍生物n-辛基-1-S-β-D-吡喃葡萄糖苷的溶致相行为
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
R. Templer
中科院分区：
文献类型：
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作者：
P. Sakya;J. Seddon;R. Templer
我们用偏光显微镜和x射线衍射测定了n-辛基- i -O-p-D-glucopyranoside及其硫代衍生物n-辛基- i -S-p-D-glucopyranoside在水中的相图。这两种化合物的比较使我们对决定相行为的复杂相互作用有了深入的了解。两种化合物形成I型（正常）溶致相，在低水化作用下采用流体层状相，在高水化作用下采用立方相。然而，在胶束溶液附近的正辛基- i -o -p- d -葡萄糖苷/水体系中观察到的六方相在正辛基- i - s -p- d -葡萄糖苷/水体系中被抑制。此外，我们还发现，在这两种体系中，立方相自发地生长成大的单畴，正如被困气泡的面状所揭示的那样。对单畴衍射图的标引表明，在这两种情况下，三次相的空间群均为i3d （no. 3）。230)。
We have determined the phase diagrams of n-octyl-I -O-p-D-glucopyranoside and its thio derivative n-octyl-I -S-p-D-glucopyranoside in water, using polarizing microscopy and X-ray diffraction. Comparison of the two compounds gives us an insight into the complex interactions which determine phase behaviour. Both compounds form type I (normal) lyotropic phases, with the adoption of a fluid lamellar phase at low hydrations and a cubic phase at higher hydrations. However, the hexagonal phase observed in the n-octyl- I-O-p-D-glucopyranoside/water system adjacent to the micellar wlution is suppressed in the n-octyl-I-S-p-D-glucopyranoside/water system. In addition, we have found that in both systems the cubic phase spontaneously grows into large monodomains, as revealed by faceting of entrapped air bubbles. Indexing of the monodomain diffraction patterns shows that in both cases the space group of the cubic phase is Ia3d (no. 230).