Fast Detection of Water
and Organic Molecules by a Change of Color in an Iron(II) Microporous
Spin-Crossover Coordination Polymer
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Abstract
Here we present a novel three-dimensional iron(II) spin-crossover
porous coordination polymer based on the bis(1,2,4-triazol-4-yl)adamantane
(tr<sub>2</sub>ad) ligand and the [Au(CN)<sub>2</sub>]<sup>−</sup> metalloligand anions with the formula {Fe<sub>3</sub>(tr<sub>2</sub>ad)<sub>4</sub>[Au(CN)<sub>2</sub>)]<sub>2</sub>}[Au(CN)<sub>2</sub>]<sub>4</sub>·G. The sorption/desorption of guest molecules,
water, and five/six-membered-ring organic molecules is easily detectable
because the guest-free and -loaded frameworks present drastically
distinct coloration and spin-state configurations
