Guest‐Dependent Spin‐Transition Behavior of Porous Coordination Polymers

• Published in: Chemistry : a European journal Vol. 23; no. 10; pp. 2236 - 2248
• Main Authors: Ohtani, Ryo, Hayami, Shinya
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 16.02.2017
• Subjects: Chemistry; Coordination polymers; Flexibility; Halogens; host–guest chemistry; metal–organic frameworks; Organic chemistry; Polymer matrix composites; porous coordination polymers; Solvents; spin transition; spin-state switching; Stimulants; Switches; spin-state switching; host-guest chemistry; porous coordination polymers; spin transition; metal-organic frameworks
• ISSN: 0947-6539; 1521-3765
• DOI: 10.1002/chem.201601880

The host–guest composites of Hofmann‐type iron(II) spin‐transition (ST) porous coordination polymers incorporating guest molecules show guest‐dependent ST behavior in accordance with the respective guest species, which may be a gas, solvent, halogen, or organic molecule. The guest also works as a chemical stimulant to switch the spin state of the host between high and low spin at room temperature. In this review, we discuss guest properties including size, shape, flexibility, chemical properties, and pore loading content, which impact the spin states of the host framework and the ST behavior exhibited by the host–guest composites. It all depends on the guests: The host–guest composites of Hofmann‐type iron(II) spin‐transition porous coordination polymers incorporating guest molecules show guest‐dependent spin‐transition behavior in accordance with the respective guest species (see scheme: G=guest, L=ligand).