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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kus, Nihal Jarmelo, Susana Fausto, Rui Ünsalan, Ozan |
| Description | Country affiliation: Turkey Author Affiliation: Ünsalan O ( Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal); Kus N ( Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal); Jarmelo S ( Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal.); Fausto R ( Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal. Electronic address: rfausto@ci.uc.pt.) |
| Abstract | Monomers of trans- (TS) and cis-stilbene (CS) were isolated in cryogenic argon and xenon matrices, and their infrared (IR) spectra were fully assigned and interpreted. The interpretation of the vibrational spectra received support from theoretical calculations undertaken at the DFT(B3LYP)/6-311++G(d,p) level of theory. In situ broadband UV irradiation of the matrix-isolated CS led to its isomerization to TS, which appeared in the photolysed matrices in both non-planar and planar configurations. The non-planar species was found to convert into the more stable planar form upon subsequent annealing of the matrices at higher temperature. TS was found to be photostable under the used experimental conditions. The structure of the non-planar TS form was assigned based on the comparison of its observed IR spectrum with those theoretically predicted for different conformations of TS. Chemometrics was used to make this assignment. Additional reasoning on the structure of the studied stilbenes is presented taking as basis results of the Natural Bond Orbital analysis. |
| ISSN | 13861425 |
| Volume Number | 136 Pt A |
| e-ISSN | 18733557 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2015-02-05 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Spectroscopy, Fourier Transform Infrared Methods Stilbenes Chemistry Argon Isomerism Molecular Structure Photochemistry Isolation & Purification Ultraviolet Rays Vibration Xenon Journal Article Research Support, Non-u.s. Gov't Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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