Exploring 2‐D σ−σ* Conjugation in Cyclic Polysiloxane Copolymers
Zijing Zhang, Cecilia Pilon, Pimjai Pimbaotham, Siriporn Jungsuttiwong, Aleksander Rebane, Richard M Laine · 2026
Read Exploring 2‐D σ−σ* Conjugation in Cyclic Polysiloxane Copolymers by Zijing Zhang, Cecilia Pilon, Pimjai Pimbaotham, Siriporn Jungsuttiwong, Aleksander Rebane, Richard M Laine (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/PMC13542737.txt.
Description
Zijing Zhang and colleagues published a 2026 chemistry study defining a form of electronic conjugation that runs across silicon-oxygen bonds in ring-shaped siloxane polymers. Conjugation, the sharing of electrons across a structure, is what lets many plastics conduct or emit light. The team built copolymers from a four-membered vinyl-bearing siloxane ring joined with aromatic units, using a Heck coupling reaction, and also decorated rings with side groups including thiophene.
Light measurements showed shifted absorption and emission consistent with the unusual conjugation, with thiophene-bearing versions reaching the lowest-energy excited states. Two distinct emitting states appeared, suggesting more than one mechanism at work. A strong electron acceptor formed its radical anion on contact, a classic sign of conjugation, even in simple decorated rings outside any polymer chain. Computer modelling showed the ring flattens when excited. The authors present them as a new two-dimensional conjugation family.
Catalog record
| CREATOR | Zijing Zhang, Cecilia Pilon, Pimjai Pimbaotham, Siriporn Jungsuttiwong, Aleksander Rebane, Richard M Laine |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 28928 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |