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相关概念视频

Photoluminescence: Fluorescence and Phosphorescence01:23

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Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
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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 12, 2025

Building a Simple and Versatile Illumination System for Optogenetic Experiments
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可见光驱动的固态光光开关用于高层次信息加密.

Zhiyuan Han1, Meixia He1, Gang Wang2

  • 1Institute of Advanced Materials and School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China.

Angewandte Chemie (International ed. in English)
|September 25, 2024
PubMed
概括

研究人员使用希夫基和纳夫他化物光体开发了新的固态光光开关. 这些材料表现出可逆的,可见光驱动的颜色和光变化,使先进的信息加密成为可能.

关键词:
在ESIPT的基础上,ESIPT是.高级信息加密信息的加密.在imine的照片交换机.固态光色学是固态光色学.可见光 可见光 可见光.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 有机化学 有机化学
  • 摄影化学的使用.

背景情况:

  • 开发可见光激活的固态光光开关是一个重大挑战.
  • 现有的光开关通常依赖于salicylaldimine结构和激发状态的分子内质子转移 (ESIPT) 与cis-trans异构化.

研究的目的:

  • 设计和合成新型的希夫基基光开关,其中包括纳夫他化物光体.
  • 为了实现可见光驱动的,在固态中实现双模式 (颜色和光) 切换.
  • 探索这些光开关在信息加密应用中的潜力.

主要方法:

  • 将一个庞大的纳夫他胺光体纳入希夫基结构.
  • 在可见光照射下研究光交换行为.
  • 涉及ESIPT和cis-trans异构化的机制研究.
  • 展示应用程序,如光图和信息编码.

主要成果:

  • 合成了三个新的光开关,在固态中显示双模式变化 (颜色和光).
  • 最优的光开关在可见光照射时显示了三重光变化 (绿色,黄色,色).
  • 切换过程是可逆的,可以在10个周期内重复,具有良好的光疲劳抵抗力.
  • 纳夫塔利米德组促进了多色发射,并诱导了折叠结构,增强了ESIPT和异构.

结论:

  • 建立了可见光驱动的固态光光开关的可靠策略.
  • 开发的光开关显示了先进信息加密和短暂信息记录的前景.
  • 这些发现有助于智能材料领域,具有可调节的光学特性.