Tunable Hydrogen Release from Amine–Boranes via their Insertion into Functional Polystyrenes. (12th September 2019)

• Record Type: Journal Article
• Authors: Ledoux, Audrey; Brunet, Juliette; Raynaud, Jean; Lacôte, Emmanuel
• Is Part Of: Angewandte Chemie. Volume 131:Number 43(2019)
• Page Start: 15383
• Page End: 15387
• Publication Date: 2019-09-12
• Subjects: Aminborane -- Bor -- Dehydrierung -- Lewis-Paare -- Polymere; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201904898
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Polystyrene‐g‐boramine random copolymers are dihydrogen reservoirs with tunable dehydrogenation temperatures, which can be adjusted by selecting the boramine content in the copolymers. They display a unique dihydrogen thermal release profile, which is a direct consequence of the insertion of the amine–boranes in a polymeric scaffold, and not from a direct modification of the electronics or sterics of the amine–borane function. Finally, the mixture of polystyrene‐g‐boramines with conventional NH3 ‐BH3 (borazane) allows for a direct access to organic/inorganic hybrid dihydrogen reservoirs with a maximal H2 loading of 8 wt %. These exhibit a dehydrogenation temperature lower than that of either the borazane or the polystyrene‐g‐boramines taken separately. Abstract : Wasserstoff zum Mitnehmen : Grafting von wasserstoffreichen Aminboran‐Lewis‐Paaren in polymere Gerüste führt zu Materialien zum Freisetzen von H2 . Die H2 ‐Freisetzung wird dabei durch eine Temperatur kontrolliert, die durch das Borverhältnis und die makromolekularen Eigenschaften und nicht durch elektronische Effekte bestimmt wird. Die Materialien ermöglichen zusätzlich die saubere Dehydrierung von Aminboranen.