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A diarylethene diradical having a new switching unit for intramolecular magnetic interaction was synthesized. The photoswitching unit has an extended π-conjugated chain in one aryl unit, and two nitronyl nitroxide radical are placed at both ends of the π-conjugated chain. The diarylethene moiety is located in the middle of the chain. This diarylethene is designed to change the hybrid orbital from...
We have synthesized 1,2-bis[6-(1-oxyl-3-oxide-4,4,5,5-tetramethylimidazolin-2-yl)-2-methylbenzo[b]thiophen-3-yl]hexafluorocyclopentene (2a) which shows photoswitching of intramolecular magnetic interaction between two nitronyl nitroxide radicals. Compound 2 showed ideal photochromic performance. The conversions from open-ring form isomer 2a to closed-ring form isomer 2b, and from 2b to 2a were both...
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