BODIPY,BIDIPY,GADIPY和SBDIPY的两个光子吸收
Ismael A Elayan1, Mingmin Zhou1, Alex Brown1
1Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2. elayan@ualberta.ca.
Physical chemistry chemical physics : PCCP
|February 3, 2025
概括
这项研究以计算方式研究了新型含基的二聚甲 (DIPY) 化合物中的二光子吸收 (2PA). 延长与基的结合显著增强2PA,核心原子类型影响了这种效应的幅度.
科学领域:
- 计算化学计算化学
- 光物理学的光学物理学
- 非线性光学是非线性光学.
背景情况:
- 二甲基 (BODIPY) 化合物具有可调节的光物理特性,包括两光子吸收 (2PA).
- 最近的合成努力通过用更重的元素取代来产生含有 pnictogen 的类似物 (例如,SBDIPY,BIDIPY,GADIPY).
- 了解这些新型染色体的2PA特性对于它们在先进光学材料中的应用至关重要.
研究的目的:
- 通过计算来研究替代的含有 pnictogen 的 DIPY 染色体的两光子吸收 (2PA) 特性.
- 探索核心原子替代 (B,Sb,Bi,Ga) 和联在2PA截面上的影响.
- 评估各种时间依赖密度函数理论 (TD-DFT) 函数的性能,以预测这些属性.
主要方法:
- 对18个DIPY染色体进行2PA截面 (σ2PA),激发能 (ΔE) 和二极极时的气相计算.
- 使用了多个函数的时间依赖密度函数理论 (TD-DFT) (CAM-B3LYP, ωB97X, M06-2X, M11, MN15).
- 将TD-DFT结果与二次近似合集群 (RI-CC2) 计算进行比较以进行验证.
主要成果:
- 在MN15,CAM-B3LYP和M06-2X函数中,RI-CC2对所研究的特性有很好的一致性.
- 对于未被替换的DIPY,替换核心原子对2PA截面的影响最小.
- 通过替代剂扩展结合,显著增强了2PA值,核心原子类型调节了这种增强.
结论:
- 选择TD-DFT功能对于准确预测这些系统中的2PA属性至关重要.
- 结合是增加2PA在含有pnictogen的DIPY染色体中的关键策略.
- 核心原子在微调2PA增强中发挥作用,这种增强是通过延长合实现的.
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