Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland.
Silesian Center for Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland.
Sci Rep. 2017 Feb 6;7:42103. doi: 10.1038/srep42103.
In this letter, we reported thorough the structural and molecular dynamics studies on 1,6-anhydro-β-D-glucose, the second compound reported so far that is capable to form rotator and supercooled liquid phases. In contrast to the data presented for ethanol, temperature dependences of structural dynamics in both phases are very comparable. On the other hand, X ray measurements revealed unusually long range ordering/correlations between molecules in the ODIC (d ≈ 95 Å) and supercooled phases (d ≈ 30-40 Å) of this carbohydrate. Our consideration clearly demonstrated that the interplay between length scales of static range ordering and dynamical heterogeneities as well as internal molecular arrangement seem to be the key to understanding the molecular dynamics of different materials characterized by varying degree of disorder in the vicinity of the glass transition temperature.
在这封信中，我们通过结构和分子动力学研究了 1,6-脱水-β-D-葡萄糖，这是迄今为止报道的第二种能够形成旋转相和过冷液相的化合物。与迄今为止为乙醇提供的数据相比，两种相中结构动力学的温度依赖性非常相似。另一方面，X 射线测量显示，这种碳水化合物的 ODIC（d≈95Å）和过冷相（d≈30-40Å）中的分子之间存在异常长程有序/相关性。我们的考虑清楚地表明，静态范围有序和动态非均相以及内部分子排列的长度尺度之间的相互作用似乎是理解具有不同无序程度的不同材料的分子动力学的关键，这些材料的玻璃化转变温度附近的分子动力学。
