Selective, adsorbate-induced spin state changes in transition metal-based metal-organic frameworks

US11517878B2 · kind B2 · utility

Assignee

• The Regents of the University of California · US

Inventors

• Jeffrey R. Long · Oakland, US
• Benjamin K. Keitz · Austin, US
• Douglas Reed · New York, US

Key dates

• Filing date: Mar 31, 2017
• Grant date: Dec 6, 2022
• Expiry date: Feb 24, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02C20/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An adsorbate-selective metal organic framework includes a transition metal; and a plurality of organic molecules coordinated to the transition metal so as to preserve open coordination sites for selectively adsorbing molecules that have low-lying π* orbitals. The transition metal has a lowest energy spin state in the presence of the selectively adsorbed molecules that are strongly bonding to the transition metal through π-donating interactions which is different than the lowest energy spin state in the absence of these adsorbed molecules. The transition metal has also a lowest energy spin state in the presence of non-selected molecules that are weakly bonding to the transition metal through σ- and/or π-accepting and/or donating interactions.