Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 11, Issue 3, Pages 1232-1238Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta08632h
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By confining spin-crossover material into a sponge, reversible spin-state switching in the solid state under ambient conditions is achieved through laser irradiation and shutting off. Moreover, the integration of hygroscopic material enables the sponge to undergo reversible spin-state switching triggered by atmospheric humidity, accompanied by color variation. This research is expected to provide a promising strategy for developing molecular switches triggered by natural energy sources at the device level.
The practical application of molecular switches is highly dependent on the reversible spin-state switching under ambient conditions, which needs a delicate materials design. Here, by confining a spin-crossover material into a sponge, the challenging goal of reversible spin-state switching in the solid state under ambient conditions has been realized, upon irradiation with a 980 nm laser for 120 s followed by shutting off the laser for 150 s. More importantly, further integration of the hygroscopic material has endowed the sponge with the merits of effective atmospheric humidity-triggered reversible spin-state switching under ambient conditions for the first time, accompanied by a reversible color variation upon naturally occurring humidity capture/release cycles. This work is expected to provide a fairly good strategy for developing novel molecular switches triggered by natural energy sources at the device level.
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