Infrared spectra and assignments of 6Li/7Li substituted single crystals of lithium-2,4-pentanedionate期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Infrared spectra and assignments of 6Li/7Li substituted single crystals of lithium-2,4-pentanedionate

Affiliation:	1. Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran;2. Faculty of Chemistry, Shahid Beheshti University G.C., Tehran 1983963113, Iran;3. Institute of Inorganic and Analytical Chemistry, Chair of Inorganic Chemistry II, Friedrich Schiller University Jena, Humboldtstr. 8, 07743 Jena, Germany;1. National Institute for R&D of Isotopic and Molecular Technologies, Donath St. 65-103, 400293 Cluj-Napoca, Romania;2. Beijing Synchrotron Radiation Facilities of Beijing Electron Positron Collider National Laboratory, Beijing, People''s Republic of China;3. Department of Physics & Chemistry, Technical University of Cluj-Napoca, 400020 Cluj-Napoca, Romania;4. Department of Mechanisms, Fine Mechanics and Mechatronics, Technical University of Cluj-Napoca, 400020 Cluj-Napoca, Romania;5. Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, 30 Reactorului Street, P.O. BOX MG-6, Bucharest–Magurele, Romania;6. Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics, 141980 Dubna, 6 Joliot-Curie Street, Russia;1. Max Planck-Weizmann Center for Integrative Archeology and Anthropology, Weizmann Institute of Science, Rehovot 76100, Israel;2. Department of Structural Biology and the Kimmel Center for Archeological Sciences, Weizmann Institute of Science, Rehovot 76100, Israel;3. Israel Antiquities Authority, POB 586, Jerusalem 91004, Israel;4. D-REAMS Radiocarbon Laboratory, Weizmann Institute of Science, Rehovot 76100, Israel

Abstract:	Polarized i.r. reflection spectra of single crystals of Li-2,4-pentanedionate (Li-acac) were recorded in the region from 200–600 cm⁻¹. Bands due to vibrations of the lithium ions were identified using the ⁶Li/⁷Li isotopic replacement technique. Various LiO distances as well as different degrees of distortion in the four symmetrically unequal LiO₄ coordination polyhedra lead to a specific spectroscopic behaviour for each of these polyhedra. It is therefore possible to suggest an assignment of the observed LiO bands to specific LiO₄ groups. The results of a rough calculation support this assignment. A correlation between LiO distances and LiO stretching force constants is proposed.

Keywords:
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