首页 | 本学科首页   官方微博 | 高级检索  
     检索      


High pressure Raman spectra of d-threonine crystal
Institution:1. Department of Chemistry, Arignar Anna Govt Arts & Science College, Karaikal, 609 605, India;2. Research and Development Centre, Bharathiar University, Coimbatore, 641 046, India;3. School Sciences and Humanities, Vel Tech University, Chennai, 600 062, India;1. Department of Analytical Chemistry and Pharmaceutical Technology, Center for Pharmaceutical Research, Vrije Universiteit Brussel – VUB, Laarbeeklaan 103, Brussels B-1090, Belgium;2. Irstea, UMR1201 ITAP, Rue J.F. Breton 361, Montpellier 34191, France;3. Laboratory of Pharmaceutical Process Analytical Technology, Ghent University, Harelbekestraat 72, Ghent B-9000, Belgium;4. Laboratory of Drug Quality & Registration (DruQuaR), Ghent University, Harelbekestraat 72, Ghent B-9000, Belgium;1. Department of Physics, College of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia;2. Department of Physics, Manav Rachna College of Engineering, Faridabad, Haryana 121001, India;3. Crystal Growth Lab, Departamento de Física de Materiales, Universidad Autónoma de Madrid, Madrid 28049, Spain;1. Instituto Superior Técnico, Universidade de Lisboa, Av. Prof. Dr. Aníbal Cavaco Silva, 2744-016 Porto Salvo, Portugal;2. INESC-ID Lisboa, Av. Prof. Dr. Aníbal Cavaco Silva, 2744-016 Porto Salvo, Portugal;1. Department of Orthopaedics, University Hospital Aachen, Aachen, Germany;2. Fraunhofer Institute for Production Technology, Aachen, Germany;3. Mabri Vision GmbH, Aachen, Germany;4. Department of Orthopaedic Trauma, University Hospital Aachen, Aachen, Germany;5. Institute of Anatomy and Cell Biology, University Hospital Aachen, Aachen, Germany;6. Department of Diagnostic and Interventional Radiology, University Hospital Aachen, Aachen, Germany;1. Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan;2. Division of Diabetes and Endocrinology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
Abstract:Raman spectra of d-threonine crystal were recorded for pressures up to 8.5 GPa. Modifications in the lattice modes indicate that the crystal undergoes two structural phase transitions, the first in the 1.9–2.4 GPa pressure range and the second in the 5.1–6.0 GPa pressure range. Splitting of modes and changes in the intensity of several bands suggest a conformational reorientation of the molecule in the crystal framework between 3.5 and 4.3 GPa. We discussed ours results by comparing with previous high-pressure investigation on l-conformer.
Keywords:High-pressure  Phase transition  Conformational changes  Raman scattering  
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号