使用Solvatochromic效应和密度函数理论的梅特福林化物的地面和兴奋状态双极时刻
Semahegn Asemare1, Abebe Belay2, Alemu Kebede3
1Department of Applied Physics, School of Applied Natural Sciences, Adama Science and Technology University, PO Box 1888, Adama, Ethiopia. semahegnasemare4@gmail.com.
Journal of fluorescence
|July 28, 2023
概括
这项研究使用各种模型和计算方法确定了甲福胺的基态和激发状态二极极时刻. 结果显示,由于溶剂极性效应,激发状态的二极极矩比基本状态大.
科学领域:
- 物理化学 物理化学
- 计算化学计算化学
- 频谱学是一种光谱学.
背景情况:
- 甲福明化是一种广泛使用的抗糖尿病药物.
- 了解其分子特性,如双极时刻,对于药物设计和理解其相互作用至关重要.
- 溶色法和计算技术为分子电子结构提供了洞察力.
研究的目的:
- 为了确定甲的基 (μg) 和激发状态 (μe) 双极时刻.
- 为了研究溶剂极性对甲胺的光谱特性的影响.
- 将实验结果与使用密度函数理论 (DFT) 的理论计算进行比较.
主要方法:
- 使用Lippert-Mataga,Bakhshiev,Kawski-Chamma-Viallet和Reichardt模型进行了Solvatochromic转移分析.
- 在各种溶剂中进行UV-Vis吸收和光发射光谱.
- 密度函数理论 (DFT) 计算 (B3LYP函数与3-21+G*,6-31+G(d,p,和6-311+G(d,p) 基数集) 使用高斯的09W.
主要成果:
- 使用四种模型计算的甲福胺的激发状态二极极时刻 (μe) 分别为8.55 D,8.34 D,6.08 D和6.40 D.
- 始终发现激发状态的双极时刻大于基本状态的双极时刻.
- DFT计算得出了从8.24 D到10.02 D的基态双极时刻 (μg) 和从11.94 D到18.74 D的兴奋状态双极时刻 (μe).
- 使用DFT计算了HOMO-LUMO能量频段间隙,范围从5.51 eV到5.70 eV.
结论:
- 溶剂极性显著影响光发射,而不是吸收光谱,导致更大的激发状态二极极 Moment.
- 实验和DFT结果提供了有关甲在不同环境中的电子特性和分子行为的宝贵数据.
- 这项研究验证了使用混合光谱和计算方法来表征药物分子的有效性.
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