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Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate
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| Zeitschriftentitel: | Zeitschrift für Naturforschung A |
|---|---|
| Personen und Körperschaften: | , , |
| In: | Zeitschrift für Naturforschung A, 58, 2003, 2-3, S. 118-120 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Walter de Gruyter GmbH
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| Schlagwörter: |
| author_facet |
Kawski, A. Kuklinski, B. Bojarski, P. Kawski, A. Kuklinski, B. Bojarski, P. |
|---|---|
| author |
Kawski, A. Kuklinski, B. Bojarski, P. |
| spellingShingle |
Kawski, A. Kuklinski, B. Bojarski, P. Zeitschrift für Naturforschung A Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate Physical and Theoretical Chemistry General Physics and Astronomy Mathematical Physics |
| author_sort |
kawski, a. |
| spelling |
Kawski, A. Kuklinski, B. Bojarski, P. 1865-7109 0932-0784 Walter de Gruyter GmbH Physical and Theoretical Chemistry General Physics and Astronomy Mathematical Physics http://dx.doi.org/10.1515/zna-2003-2-307 <jats:p>The effect of temperature on absorption and fluorescence spectra of p-cyano-N,N-diethylaniline (CDEA) in ethyl acetate has been studied for temperatures ranging from 293 K to 418 K. At T = 293 K two fluorescence bands are observed: long wavelength emission (LE) and short wavelength emission (SE) of much lower intensity compared to the first one.With temperature increase (which leads to the decrease of dielectric constant ε of the solvent) the intensity of SE band strongly increases, however its hypsochromic shift compared to the shift of LE band is rather slight. The electric dipole moments for CDEA determined based on this thermochromic method are: μ<jats:sup>LE</jats:sup> <jats:sub>e</jats:sub> = 13.4 D and μ<jats:sup>SE</jats:sup> <jats:sub>e</jats:sub> = 7.5 D for μg = 5.5 D, and μ<jats:sup>LE</jats:sup> e = 13.9 D and μ<jats:sup>SE</jats:sup> <jats:sub>e</jats:sub> = 8.3 D for μ<jats:sub>g</jats:sub> = 6.6 D. The values obtained are compared with those of p-cyano-N,N-dimethylaniline (CDMA) determined using different methods.</jats:p> Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate Zeitschrift für Naturforschung A |
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10.1515/zna-2003-2-307 |
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Walter de Gruyter GmbH, 2003 |
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Walter de Gruyter GmbH, 2003 |
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0932-0784 1865-7109 |
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| title |
Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate |
| title_unstemmed |
Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate |
| title_full |
Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate |
| title_fullStr |
Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate |
| title_full_unstemmed |
Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate |
| title_short |
Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate |
| title_sort |
thermochromic excited – state dipole moment measurements of p-cyano-n,n-diethylaniline in ethyl acetate |
| topic |
Physical and Theoretical Chemistry General Physics and Astronomy Mathematical Physics |
| url |
http://dx.doi.org/10.1515/zna-2003-2-307 |
| publishDate |
2003 |
| physical |
118-120 |
| description |
<jats:p>The effect of temperature on absorption and fluorescence spectra of p-cyano-N,N-diethylaniline (CDEA) in ethyl acetate has been studied for temperatures ranging from 293 K to 418 K. At T = 293 K two fluorescence bands are observed: long wavelength emission (LE) and short wavelength emission (SE) of much lower intensity compared to the first one.With temperature increase (which leads to the decrease of dielectric constant ε of the solvent) the intensity of SE band strongly increases, however its hypsochromic shift compared to the shift of LE band is rather slight. The electric dipole moments for CDEA determined based on this thermochromic method are: μ<jats:sup>LE</jats:sup>
<jats:sub>e</jats:sub> = 13.4 D and μ<jats:sup>SE</jats:sup>
<jats:sub>e</jats:sub> = 7.5 D for μg = 5.5 D, and μ<jats:sup>LE</jats:sup> e = 13.9 D and μ<jats:sup>SE</jats:sup>
<jats:sub>e</jats:sub> = 8.3 D for μ<jats:sub>g</jats:sub> = 6.6 D. The values obtained are compared with those of p-cyano-N,N-dimethylaniline (CDMA) determined using different methods.</jats:p> |
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| author | Kawski, A., Kuklinski, B., Bojarski, P. |
| author_facet | Kawski, A., Kuklinski, B., Bojarski, P., Kawski, A., Kuklinski, B., Bojarski, P. |
| author_sort | kawski, a. |
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| description | <jats:p>The effect of temperature on absorption and fluorescence spectra of p-cyano-N,N-diethylaniline (CDEA) in ethyl acetate has been studied for temperatures ranging from 293 K to 418 K. At T = 293 K two fluorescence bands are observed: long wavelength emission (LE) and short wavelength emission (SE) of much lower intensity compared to the first one.With temperature increase (which leads to the decrease of dielectric constant ε of the solvent) the intensity of SE band strongly increases, however its hypsochromic shift compared to the shift of LE band is rather slight. The electric dipole moments for CDEA determined based on this thermochromic method are: μ<jats:sup>LE</jats:sup> <jats:sub>e</jats:sub> = 13.4 D and μ<jats:sup>SE</jats:sup> <jats:sub>e</jats:sub> = 7.5 D for μg = 5.5 D, and μ<jats:sup>LE</jats:sup> e = 13.9 D and μ<jats:sup>SE</jats:sup> <jats:sub>e</jats:sub> = 8.3 D for μ<jats:sub>g</jats:sub> = 6.6 D. The values obtained are compared with those of p-cyano-N,N-dimethylaniline (CDMA) determined using different methods.</jats:p> |
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| physical | 118-120 |
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| spelling | Kawski, A. Kuklinski, B. Bojarski, P. 1865-7109 0932-0784 Walter de Gruyter GmbH Physical and Theoretical Chemistry General Physics and Astronomy Mathematical Physics http://dx.doi.org/10.1515/zna-2003-2-307 <jats:p>The effect of temperature on absorption and fluorescence spectra of p-cyano-N,N-diethylaniline (CDEA) in ethyl acetate has been studied for temperatures ranging from 293 K to 418 K. At T = 293 K two fluorescence bands are observed: long wavelength emission (LE) and short wavelength emission (SE) of much lower intensity compared to the first one.With temperature increase (which leads to the decrease of dielectric constant ε of the solvent) the intensity of SE band strongly increases, however its hypsochromic shift compared to the shift of LE band is rather slight. The electric dipole moments for CDEA determined based on this thermochromic method are: μ<jats:sup>LE</jats:sup> <jats:sub>e</jats:sub> = 13.4 D and μ<jats:sup>SE</jats:sup> <jats:sub>e</jats:sub> = 7.5 D for μg = 5.5 D, and μ<jats:sup>LE</jats:sup> e = 13.9 D and μ<jats:sup>SE</jats:sup> <jats:sub>e</jats:sub> = 8.3 D for μ<jats:sub>g</jats:sub> = 6.6 D. The values obtained are compared with those of p-cyano-N,N-dimethylaniline (CDMA) determined using different methods.</jats:p> Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate Zeitschrift für Naturforschung A |
| spellingShingle | Kawski, A., Kuklinski, B., Bojarski, P., Zeitschrift für Naturforschung A, Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate, Physical and Theoretical Chemistry, General Physics and Astronomy, Mathematical Physics |
| title | Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate |
| title_full | Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate |
| title_fullStr | Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate |
| title_full_unstemmed | Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate |
| title_short | Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate |
| title_sort | thermochromic excited – state dipole moment measurements of p-cyano-n,n-diethylaniline in ethyl acetate |
| title_unstemmed | Thermochromic Excited – State Dipole Moment Measurements of p-Cyano-N,N-diethylaniline in Ethyl Acetate |
| topic | Physical and Theoretical Chemistry, General Physics and Astronomy, Mathematical Physics |
| url | http://dx.doi.org/10.1515/zna-2003-2-307 |