Tuning the photophysics of a bio-active molecular probe ‘3-pyrazolyl-2-pyrazoline’ derivative in different solvents: Dual effect of polarity and hydrogen bonding
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- 作者：Arindam Sarkar ; Tapas Kumar M ; al ; Dipak Kumar Rana ; Sayaree Dhar ; Sayantani Chall ; Subhash Ch ; ra Bhattacharya
- 关键词：Kamlet– ; Taft parameter ; Hydrogen bonding ; Lifetime ; Polarity ; Fluorescence
- 刊名：Journal of Luminescence
- 出版年：2010
- 出版时间：November 2010
- 年：2010
- 卷：130
- 期：11
- 页码：2271-2276
- 全文大小：417 K
文摘
The solvatochromic behavior of 3-pyrazolyl 2-pyrazoline derivative (PYZ), a newly synthesized molecular probe having pharmaceutical importance, has been studied in various solvents of different polarity. The Kamlet and Taft solvatochromic comparison method was utilized to rationalize the solute–solvent interactions from absorption and emission measurements. Spectroscopic studies reveal that the solvatochromic behavior of the dye depends not only on the polarity of the medium but also on the hydrogen-bonding properties of the solvents. The non-radiative relaxation process is facilitated by an increase in the polarity of the media. The photophysical response of PYZ in different solvents has been explained considering solute–solvent interactions.