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在典型的不对称PIQ光体中计算揭示了依赖于溶剂极性的ESDPT行为

Zibo Shen¹, Chang Liu¹, Jinfeng Zhao^1,2

¹College of Physical Science and Technology, Shenyang Normal University, Shenyang 110034, China. jfzhao1990112@163.com.

Physical chemistry chemical physics : PCCP

|November 20, 2025

概括

在PIQ光体中,不对称的兴奋状态双质子转移 (ESDPT) 显示由溶剂极性调节. 这项研究解读了ESDPT的动态,这对于推进生物成像技术至关重要.

科学领域:

光化学和分子光谱学
计算化学和量子力学的量子力学.
材料科学用于生物成像.

背景情况:

激发状态的分子内质子转移 (ESIPT) 分子对生物成像具有前景.
不对称的兴奋状态双质子转移 (ESDPT) 机制比对称的ESIPT了解得更少.
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研究的目的:

为了阐明不对称PIQ光体中的依赖溶剂的ESDPT动态.
研究溶剂极性对ESDPT反应通路的影响.
了解非对称ESDPT对潜在的生物成像应用的基本机制.

主要方法:

用密度函数理论 (DFT) 和时间依赖 DFT (TDDFT) 进行理论计算.
分析了关键的分子性质:键长,红外振动光谱,IRI,CVB指数和E_HB.
使用潜在能量表面 (PES) 计算来探索溶剂极性效应.

主要成果:

证据证实,在S₀ → S₁激发时,显著的键强化,促进ESDPT.
潜在能量表面分析揭示了由溶剂极性影响的独特ESDPT路径.
PIQ光体表现出极性调节的ESDPT,在低极性和高极性溶剂中显示出不同的兴奋状态行为.

结论:

这项研究成功地解读了不对称PIQ光体中的依赖溶剂的ESDPT机制.
溶剂极性在调节ESDPT动态和兴奋状态行为的过程中起着至关重要的作用.
结果提供了对不对称的ESDPT的基本见解,为新型生物成像剂铺平了道路.

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