کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1232961 968800 2015 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Trans- and cis-stilbene isolated in cryogenic argon and xenon matrices
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Trans- and cis-stilbene isolated in cryogenic argon and xenon matrices
چکیده انگلیسی


• Monomers of trans- (TS) and cis-stilbene (CS) were isolated in cryogenic argon and xenon matrices.
• TS and CS infrared spectra were fully assigned and interpreted.
• In situ broadband UV irradiation of the matrix-isolated CS led to its isomerization to TS.
• TS appears in the photolysed matrices in both non-planar and planar configurations.
• Chemometrics was used to assign the structure of the non-planar TS form.

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.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 136, Part A, 5 February 2015, Pages 81–94
نویسندگان
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