特定于异构体的ESIPT活性推拉光合金染料的Solvatochromic和分子转子特性
Keenan T Regan1, Austin Pounder1, Camille Lin1
1Departments of Chemistry and Toxicology, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
The journal of physical chemistry. A
|September 29, 2023
概括
这项研究引入了新型ESIPT活性色素染料,用于增强生物感知. 正态异构体表现出高量子产量和积极的溶色,而抛态异构体表现出分子旋转器行为,为应用提供可调的光.
科学领域:
- 摄影化学的使用.
- 有机化学 有机化学
- 材料科学 材料科学 材料科学
背景情况:
- 兴奋状态内分子质子转移 (ESIPT) 染色体对于化学感知至关重要,因为它具有很大的斯托克斯转移.
- 经典的2-(2'-基) 贝扎 (HBX) 光体利用ESIPT进行红移光.
- 了解ESIPT机制是开发先进光探针的关键.
研究的目的:
- 为了合成和表征新型的正体和准异体ESIPT活性色素染料.
- 为了研究这些同位素在各种溶剂中的光物理性质.
- 探索它们在DNA生物传感应用中的潜力.
主要方法:
- 合成含有HBX部分和6-甲基-英丹 (6MI) 的正和准色剂.
- 在极性前离子 (MeOH,Gly/MeOH) 和非极性前离子 (二氧化) 溶剂中的光物理特性.
- 密度函数理论 (DFT) 计算用于机械洞察力.
主要成果:
- 这两种异构体都倾向于以诺形式,并表现出ESIPT,产生具有较大的斯托克斯转移的纯基因排放.
- орто异构体显示出更高的量子产量,缺乏分子旋转器特征,并表现出积极的溶染色.
- 在粘性溶剂中,由于扭曲的分子内电荷转移 (TICT),para-isomers表现出分子旋转器行为和显著的开启光.
结论:
- 同位体特定的π-结合影响光物理性质,包括量子产量和TICT趋势.
- орто和para异构体的独特行为为传感应用提供可调节的光特性.
- 这些ESIPT chalcones显示出开发敏感和选择性的DNA生物传感器的前景.
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