کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7809630 | 1501734 | 2015 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Molecular aggregates of Merocyanine 540 in aqueous suspensions containing natural and CTAB-modified bentonite
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The molecular interactions of MC-540 (Merocyanine 540) in clay suspensions containing natural bentonite and CTAB (cetyl trimethyl ammonium bromide)-modified bentonite were examined by using absorption, steady-state and time-resolved fluorescence spectroscopies. Strong affinity of clays for dye adsorption caused the strong interaction of MC-540 molecules with bentonite particles in aqueous dispersion. The interaction of dye with natural bentonite and CTAB-modified bentonite particles in aqueous dispersion caused significant changes in the photophysical properties of MC-540 when they were compared to those in pure water. Spectral data revealed that monomer, H-dimer and H-aggregate of MC-540 in the clay aqueous dispersions were formed depending on dye concentration. Moreover, H-aggregates of dye were predominantly formed in the CTAB-modified bentonite aqueous suspension. The presence of H-aggregates strongly decreased the fluorescence lifetime of MC-540.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 1083, 5 March 2015, Pages 101-105
Journal: Journal of Molecular Structure - Volume 1083, 5 March 2015, Pages 101-105
نویسندگان
Mehmet Kaya, Kadem Meral, Yavuz Onganer,