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| Content Provider | Springer Nature Link |
|---|---|
| Author | Iwunze, M. O. Lambert, M. Silversmith, E. F. |
| Copyright Year | 1997 |
| Abstract | A combination of fluorimetric and viscosimetric methods was used to characterize N,N-dimethyl-N-2-(4-(t-butylphenoxy)ethoxy)ethyl-N-hexadecylammonium chloride (BDHC), a doubletailed surfactant with dissimilar tail groups.BDHC was observed to fluoresce at 315 nm when excited at 274 nm, a feature which could be utilized to determine its critical micelle concentration (CMC). A value of 3.98×10−5 M was obtained and was observed to be slightly temperature dependent with aT min of 25.35°C. Fluorescence quenching experiments using 4-nitroaniline as a quencher were performed in order to determine the aggregation number which was found to be 42.0. The hydrodynamic radius of 21.91 Å was obtained using data from viscosimetric experiments. These data, together with theTanford andEinstein-Stokes relationships, were used to determine the micellar structure (spherical) and the diffusion coefficient (D=0.97×10−6 cm2/s), respectively. The ΔG of micellization forBDHC was determined to be −34.9 kJ/mol.Die Verbindung N,N-Dimethyl-N-2-(4-(t-butylphenoxy)ethoxy)ethyl-N-hexadecylammoniumchlorid (BDHC), eine oberflächenaktive Substanz mit zwei unterschiedlichen Seitenketten, wurde mittels einer Kombination von fluorimetrischen und viskosimetrischen Methoden charakterisiert. Anregung bei 274 nm ruft eine Fluoreszenz bei 315 nm hervor; diese Eigenschaft wurde zur Bestimmung der kritischen Micellenkonzentration (CMC) herangezogen. Es wurde ein geringfügig temperaturabhängiger Wert von 3.98×10−5 M gefunden (T min=25.35°C). Quenchexperimente mit 4-Nitroanilin ergaben eine Aggregationszahl von 42.0, viskosimetrische Untersuchungen einen hydrodynamischen Radius von 21.91 Å. Die erhaltenen Daten erlauben zusammen mit den Beziehungen nachTanford undEinstein-Stokes die Bestimmung der Micellenstruktur (sphärisch) und des Diffusionskoeffizienten (0.97×10−6 cm2/s). Das ΔG der Micellenbildung fürBDHC beträgt −34.9 kJ/mol. |
| Starting Page | 585 |
| Ending Page | 592 |
| Page Count | 8 |
| File Format | |
| ISSN | 00269247 |
| Journal | Monatshefte für Chemie - Chemical Monthly |
| Volume Number | 128 |
| Issue Number | 6-7 |
| e-ISSN | 14344475 |
| Language | German |
| Publisher | Springer-Verlag |
| Publisher Date | 1997-01-01 |
| Publisher Place | Vienna |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Fluorescence Hydrodynamic Micelle Surfactant Viscosity Chemistry/Food Science Analytical Chemistry Inorganic Chemistry Organic Chemistry Physical Chemistry Theoretical and Computational Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry |
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