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Multifunctional Chiral $\uppi$-Conjugated Polymer Microspheres: Production and Confinement of NLO signal, Detection of Circularly Polarized Light, and Display of Laser-Triggered NLO Emission Shiftsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 7 июля 2020 г.
- Авторы: Vattikunta Radhika, Annadhasan Mari, Jada Ravi, Prasad Muvva Durga, Mitetelo Nikolai, Zhdanova Karina, Mamonov Evgeniy, Müllen Klaus, Murzina Tatiana, Chandrasekar Rajadurai
- Журнал: Advanced Optical Materials
- Том: 8
- Номер: 13
- Год издания: 2020
- Первая страница: 2000431
- DOI: 10.1002/adom.202000431
- Аннотация: Two chiral π‐conjugated polymers with optical nonlinearity (NLO), abbreviated as R‐ and S‐BP , are prepared by copolymerization of R‐ and S‐6,6'‐dibromo‐2,2'‐diethoxy‐1,1'‐binaphthyl with 1,4‐diethynyl‐2,5‐bis(octyloxy)benzene by Sonogashira coupling. The R‐ and S‐BP copolymers self‐assemble in a tetrahydrofuran/H2O/ethanol mixture producing microspherical particles. Remarkably, the obtained polymer microspheres support excitation of whispering gallery mode resonances (500–720 nm) in one‐ and two‐photon excited luminescence or two‐photon luminescence (TPL) with a quality factor (Q ) of up to ≈700. As a result of a high Q value, a single (R‐ or S‐BP ) microsphere displays a circular dichroism (CD) effect in the TPL signal. At high laser pump‐power (≥10 mW), the TPL spectral features of microspheres change significantly, suggesting alterations of the polymer packing. Similar spectral variations are observed for microspheres heated thermally or with high power continuous‐wave laser. Photoluminescence lifetime imaging microscopy down to the single microsphere level corroborate transformations of polymer packing from a J type to a mixture of J , H , and H‐like (with disordered side chains) types. This work demonstrates the tremendous potential of tailor‐made chiral polymer microspheres exhibiting multifunctional properties, such as i) light‐confinement, ii) NLO‐CD, and iii) laser‐driven optical emission shifts, useful for many optoelectronic and photonic device applications.
- Добавил в систему: Мамонов Евгений Александрович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | adom.202000431.pdf | 2,2 МБ | 6 июля 2020 [mamonovea] |