Na[Li(NH2BH3)2]--the first mixed-cation amidoborane with unusual crystal structure |
| |
Authors: | Fijalkowski Karol J Genova Radostina V Filinchuk Yaroslav Budzianowski Armand Derzsi Mariana Jaroń Tomasz Leszczyński Piotr J Grochala Wojciech |
| |
Institution: | Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland. |
| |
Abstract: | We describe the successful synthesis of the first mixed-cation (pseudoternary) amidoborane, NaLi(NH(2)BH(3))(2)], with theoretical hydrogen capacity of 11.1 wt%. NaLi(NH(2)BH(3))(2)] crystallizes triclinic (P1) with a = 5.0197(4) ?, b = 7.1203(7) ?, c = 8.9198(9) ?, α = 103.003(6)°, β = 102.200(5)°, γ = 103.575(5)°, and V = 289.98(5) ?(3) (Z = 2), as additionally confirmed by Density Functional Theory calculations. Its crystal structure is topologically different from those of its orthorhombic LiNH(2)BH(3) and NaNH(2)BH(3) constituents, with distinctly different coordination spheres of Li (3 N atoms and 1 hydride anion) and Na (6 hydride anions). NaLi(NH(2)BH(3))(2)], which may be viewed as a product of a Lewis acid (LiNH(2)BH(3))/Lewis base (NaNH(2)BH(3)) reaction, is an important candidate for a novel lightweight hydrogen storage material. The title material decomposes at low temperature (with onset at 75 °C, 6.0% mass loss up to 110 °C, and an additional 3.0% up to 200 °C) while evolving hydrogen contaminated with ammonia. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|