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Keto–enol tautomerism of two structurally related Schiff bases: Direct and indirect way of creation of the excited keto tautomer
| Content Provider | Semantic Scholar |
|---|---|
| Author | Fita, Piotr Luzina, Elena L. Dziembowska, T. Kopec, Dak Piatkowski, Pawel Radzewicz, Czesław Grabowska, Anna |
| Copyright Year | 2005 |
| Abstract | Abstract Femtosecond time-resolved absorption spectra of two structurally related, internally H-bonded Schiff bases are reported. The 2-hydroxynaphthylidene-1′-naphthylamine (HNAN) stable as an enol tautomer undergoes an ultrafast excited state intramolecular proton transfer, while the 2-hydroxynaphthylidene-(8′-aminoquinoline) (HNAQ), stable as a keto structure, reveals unusual relaxation routes after electronic excitation. In particular, the rise of the bleaching band with the characteristic time of ∼700 fs was found and attributed to a gradual population of the S 1 fluorescent state from a ‘hot’ excited state. The results accompanied by TDDFT calculations are used to construct the diagram of relaxation routes of an excited HNAQ molecule. |
| Starting Page | 305 |
| Ending Page | 310 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.cplett.2005.09.069 |
| Volume Number | 416 |
| Alternate Webpage(s) | http://ultrafast.fuw.edu.pl/publications/CPL_416_305.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.cplett.2005.09.069 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |