|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
Multistate Multiconfiguration Quantum Chemical Computation of the Two-Photon Absorption Spectra of Bovine Rhodopsinстатья
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: 11 ноября 2019 г.
- Авторы: Gholami Samira, Pedraza-González Laura, Yang Xuchun, Granovsky Alexander A., Ioffe Ilya N., Olivucci Massimo
- Журнал: Journal of Physical Chemistry Letters
- Том: 10
- Номер: 20
- Год издания: 2019
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 6293
- Последняя страница: 6300
- DOI: 10.1021/acs.jpclett.9b02291
- Аннотация: Recently, progress in IR sources has led to the discovery that humans can detect infrared (IR) light. This is hypothesized to be due to the two-photon absorption (TPA) events promoting the retina dim-light rod photoreceptor rhodopsin to the same excited state populated via one-photon absorption (OPA). Here, we combine quantum mechanics/molecular mechanics and extended multiconfiguration quasi-degenerate perturbation theory calculations to simulate the TPA spectrum of bovine rhodopsin (Rh) as a model for the human photoreceptor. The results show that the TPA spectrum of Rh has an intense S0 → S1 band but shows also S0 → S2 and S0 → S3 transitions whose intensities, relative to the S0 → S1 band, are significantly increased when compared to the corresponding bands of the OPA spectrum. In conclusion, we show that IR light in the 950 nm region can be perceived by rod photoreceptors, thus supporting the two-photon origin of the IR perception. We also found that the same photoreceptor can perceive red (i.e., close to 680 nm) light provided that TPA induces population of S2.
- Добавил в систему: Иоффе Илья Нафтольевич