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相关概念视频

Deactivation Processes: Jablonski Diagram01:25

Deactivation Processes: Jablonski Diagram

Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...
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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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相关实验视频

Updated: Jun 29, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
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聚合驱动的彻底级联质子转移过程 准超低值近红外有机单晶激光器

Jun-Jie Wu1, Li-Wei Xie2, Run-Chen Lai3

  • 1State Key Laboratory of Bioinspired Interfacial Materials Science, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, China.

Angewandte Chemie (International ed. in English)
|March 9, 2026
PubMed
概括

研究人员开发了一种使用聚合效应来改进近红外有机固态激光 (OSSL) 的新方法. 这种方法增强了刺激子利用率,导致高效激光的门创下历史新低.

关键词:
激发状态中的质子转移.在J-聚合物中.分子晶体是分子晶体.近红外激光是近红外激光.有机半导体 有机半导体

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科学领域:

  • 材料科学 材料科学 材料科学
  • 光电学是指光电子产品.
  • 物理化学 物理化学

背景情况:

  • 近红外有机固态激光器 (NIR OSSL) 对于激光通信至关重要,但由于刺激利用效率低下,它们面临着高值和低光学增益的挑战.
  • 在有机增益材料中,激发状态双质子转移 (ESDPT) 为NIR OSSL提供了有前途的途径,提供了有利的六个电子级系统和显著的红移刺激发射.

研究的目的:

  • 通过聚合效应研究ESDPT过程的调制,以提高激子利用率和降低NIR OSSL中的激光值.
  • 通过优化ESDPT机制,实现低值的高效NIR单晶激光.

主要方法:

  • 采用了一种新的策略,通过聚合来调节ESDPT过程,特别是利用结晶增强级联ESDPT.
  • 分析了DDMC单晶微电线中的J型合,以了解其在稳定激发状态和促进ESDPT方面的作用.
  • 人口反转密度 (ΔN) 的效率在六级能源系统的背景下进行了评估.

主要成果:

  • 结晶增强的ESDPT显著提高了激子利用率,使得激光值超低.
  • 在DDMC单晶微电线中,强大的J型合 (4260 cm-1) 有效地降低了兴奋状态能量,促进了彻底的ESDPT过程.
  • 在约870nm的NIR单晶激光中,达到了486nJ cm-2的创纪录的低激光值,这归因于高效的人口逆转.

结论:

  • 聚合效应可以在战略上用于增强ESDPT增益材料,用于低值,高增益的NIR OSSL.
  • 该研究阐明了ESDPT上聚合的基本机制,为改善OSSL性能提供了途径.
  • 这项工作为未来的进步铺平了道路,包括电NIR OSSL.