The author of 《Pendant Photochromic Conjugated Polymers Incorporating a Highly Functionalizable Thieno[3,4-b]thiophene Switching Motif》 were Peters, Garvin M.; Tovar, John D.. And the article was published in Journal of the American Chemical Society in 2019. SDS of cas: 624-73-7 The author mentioned the following in the article:
The ability to externally modulate conjugated polymer optoelectronic properties is an important challenge for modern organic electronics. One attractive approach entails the incorporation of stimuli-responsive mol. systems, such as diarylethenes, into polymeric materials. Our approach involves the design of polymers possessing photochromic moieties pendant to the main conjugated chain to allow for electronic influence along the polymer backbone while avoiding substantial conformational demands that may affect solid-state performance. Herein, we report the synthesis of a series of thieno[3,4-b]thiophene (TT)-based photochromes that demonstrate drastically different optoelectronic properties upon cyclization. Exptl. and computational investigations of aryl-extended model compounds provided crucial insight on the interplay between electronic structure and photochromic activity, thus allowing for the realization of pendant photoswitchable conjugated copolymers that reflect the activity found in the related model systems.1,2-Diiodoethane(cas: 624-73-7SDS of cas: 624-73-7) was used in this study.
1,2-Diiodoethane(cas: 624-73-7) is one of organic iodides. The carbon-iodine bond is weaker than other carbon-halogen bonds due to the poor electronegative nature of the iodine atom. In general, organic iodides are light-sensitive and turn yellow during storage, owing to the formation of iodine. Organic iodides can be alkyl, alkenyl, or alkynyl, and all of them are very reactive toward with many kinds of nucleophiles.SDS of cas: 624-73-7
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com