Výsledky vyhľadávania
Názov Shedding light on the photoisomerization pathway of donor-acceptor Stenhouse adducts Aut.údaje Mariangela Di Donato, Michael M. Lerch ... [et al.] Autor Di Donato Mariangela (15%)
Spoluautori Lerch Michael M. (15%)
Lapini Andrea (5%)
Laurent Adéle D. (10%)
Iagatti Alessandro (5%)
Bussotti Laura (5%)
Ihrig Svante P. (5%)
Medveď Miroslav 1971- (10%) UMBFP08 - Katedra chémie
Jacquemin Denis (5%)
Szymański Wiktor (5%)
Buma Wybren Jan (10%)
Foggi Paolo (5%)
Feringa Ben L. (5%)
Zdroj.dok. Journal of the American Chemical Society. Vol. 139, no. 44 (2017), pp. 15596-15599. - Washington : The American Chemical Society, 2017 Kľúč.slová molekulové fotoprepínače - molecular photoswitches donorno-akceptorové Stenhousove adukty ultra-fast spectroscopy DFT metóda Jazyk dok. angličtina Krajina Spojené štáty Systematika 54 Anotácia Donor-acceptor Stenhouse adducts (DASAs) are negative photochromes that hold great promise for a variety of applications. Key to optimizing their switching properties is a detailed understanding of the photoswitching mechanism, which, as yet, is absent. Here we characterize the actinic step of DASA-photoswitching and its key intermediate, which was studied using a combination of ultrafast visible and IR pump-probe spectroscopies and TD-DFT calculations. Comparison of the time-resolved IR spectra with DFT computations allowed to unambiguously identify the structure of the intermediate, confirming that light absorption induces a sequential reaction path in which a Z-E photoisomerization of C-2-C-3 is followed by a rotation around C-3-C-4 and a subsequent thermal cyclization step. First and second-generation DASAs share a common photoisomerization mechanism in chlorinated solvents with notable differences in kinetics and lifetimes of the excited states. The photogenerated intermediate of URL Link na plný text Kategória publikačnej činnosti ADC Číslo archívnej kópie 41477 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika 
nerozpoznaný