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Flexibility in a Molecular Crystal Accomplished by Structural Modulation of Carbohydrate Epimers
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2017-02-21 00:00:00 , DOI: 10.1021/acs.cgd.6b01749 Manas K. Panda 1 , Kumar Bhaskar Pal , Gijo Raj 1 , Rajesh Jana , Taro Moriwaki 2 , Goutam Dev Mukherjee , Balaram Mukhopadhyay , Panče Naumov 1
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2017-02-21 00:00:00 , DOI: 10.1021/acs.cgd.6b01749 Manas K. Panda 1 , Kumar Bhaskar Pal , Gijo Raj 1 , Rajesh Jana , Taro Moriwaki 2 , Goutam Dev Mukherjee , Balaram Mukhopadhyay , Panče Naumov 1
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Plastic bending of organic crystals is a well-known, yet mechanistically poorly understood phenomenon. On three structurally related epimers, derivatives of galactose, glucose, and mannose, it is demonstrated here that small changes in the molecular structure can have a profound effect on the mechanical properties. While the galactose derivative affords crystals which can be easily bent, the crystals of the derivatives of glucose and mannose are brittle and do not bend. Structural, microscopic, and mechanical evidence is provided showing that hydrogen bonding of water molecules is the key element for sliding over the slip planes in the crystal and accounts for the plastic bending.
中文翻译：
通过糖水差向异构体的结构调节完成的分子晶体的灵活性
有机晶体的塑性弯曲是众所周知的，但是在机械上却很少了解。在三种结构相关的差向异构体（半乳糖，葡萄糖和甘露糖的衍生物）上，这里证明了分子结构的微小变化会对机械性能产生深远的影响。虽然半乳糖衍生物提供了容易弯曲的晶体，但是葡萄糖和甘露糖的衍生物的晶体是脆性的并且不会弯曲。提供的结构，微观和机械证据表明，水分子的氢键键合是在晶体的滑动面上滑动并导致塑性弯曲的关键因素。
更新日期：2017-02-21
中文翻译：
通过糖水差向异构体的结构调节完成的分子晶体的灵活性
有机晶体的塑性弯曲是众所周知的，但是在机械上却很少了解。在三种结构相关的差向异构体（半乳糖，葡萄糖和甘露糖的衍生物）上，这里证明了分子结构的微小变化会对机械性能产生深远的影响。虽然半乳糖衍生物提供了容易弯曲的晶体，但是葡萄糖和甘露糖的衍生物的晶体是脆性的并且不会弯曲。提供的结构，微观和机械证据表明，水分子的氢键键合是在晶体的滑动面上滑动并导致塑性弯曲的关键因素。
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