کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5412538 | 1393432 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Molecular interaction of oxazine dyes in aqueous solution: Temperature dependent molecular disposition of the aggregates
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Molecular interaction of oxazine dyes in aqueous solution: Temperature dependent molecular disposition of the aggregates Molecular interaction of oxazine dyes in aqueous solution: Temperature dependent molecular disposition of the aggregates](/preview/png/5412538.png)
چکیده انگلیسی
Temperature dependent molecular interaction of oxazine dyes, viz., brilliant cresyl blue (C.I. Basic dye), cresyl violet (C.I. Basic violet 3) and nile blue (C.I. Basic blue 12) are studied in aqueous media within a concentration range of 5.0 Ã 10â 6 M to 8.0 Ã 10â 4 M by UV-visible absorption spectroscopy. The effect of temperature on the geometrical structure of the dimer in solution along with the dimerization equilibria is explained in terms of electrostatic and hydrophobic interactions. Modified non-covalent interaction between two monomer molecules in a dimer as a function of temperature affects the extinction coefficient as well as the geometrical disposition of the dimers and this is well manifested in the exciton splitting of the dimer spectra. The angle θ between main oscillators of the two monomer molecules in a dimer increases by 1.94° for brilliant cresyl blue, whereas an increase of 4.32° and 1.73° were observed for cresyl violet and nile blue respectively due to the increase of temperature from 20 °C to 60 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 164, Issue 3, 1 December 2011, Pages 250-256
Journal: Journal of Molecular Liquids - Volume 164, Issue 3, 1 December 2011, Pages 250-256
نویسندگان
Amitabha Chakraborty, Ratan Adhikari, Swapan K. Saha,