Spectroscopic investigation of 3-pyrazolyl 2-pyrazoline derivative in homogeneous solvents

详细信息    查看全文

• 作者：Smritimoy Pramanik ; Paltu Banerjee ; Arindam Sarkar ; Attreyee Mukherjee ; Kumar K. Mahalanabis ; Subhash Ch ; ra Bhattacharya
• 关键词：Fluorescence ; Relaxation dynamics ; Solvent polarity ; Hydrogen bonding
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：2008
• 出版时间：15 December 2008
• 年：2008
• 卷：71
• 期：4
• 页码：1327-1332
• 全文大小：684 K

文摘

How solvent conditions such as solvent polarity and hydrogen-bonding affect the fluorescence of a newly synthesized 3-pyrazolyl 2-pyrazoline derivative (Pyz) having pharmaceutical activity has been explored. The solvatochromic effect of Pyz is due to a change in dipole moment of the compound in the excited state. The relaxation of S₁ state is perturbed in hydrogen-bonding solvents. The fluorescence properties of the systems are strongly dependent on the polarity of the media. 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.