超分子染色体敏感的近红外到可见光子向上转换
Tanya N Singh-Rachford1, Animesh Nayak, Maria L Muro-Small
1Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, USA.
Journal of the American Chemical Society
|September 11, 2010
概括
这项研究证明了近红外到可见光子上升转换使用鲁丁(II) 超分子敏化剂,通过三重三重消灭光化学实现了创纪录的反斯托克斯能量增益.
科学领域:
- 摄影化学的使用.
- 材料科学 材料科学 材料科学
- 频谱学是一种光谱学.
背景情况:
- 光子上升转换使得从较低能量的光子产生更高能量的光子.
- 三倍三倍灭绝 (TTA) 是高效光子向上转换的关键机制.
- 在各种应用中,开发稳定高效的NIR-to-visible升级系统至关重要.
研究的目的:
- 用一种新型的(II) 超分子敏感剂来演示和描述NIR-到可见光子上转换.
- 为了研究底层的三倍三倍灭绝 (TTA) 光化学.
- 为了实现显著的反斯托克斯能量增益,并评估系统的稳定性.
主要方法:
- 选择性近红外 (NIR) 激发在780nm.
- 使用鲁II超分子 (PyrRuPZn) 作为与PDI或烯的敏感剂.
- 监测向上转换的光和兴奋状态吸收.
- 确定动力参数,如火常数和TTA速率常数.
- 测量量子产量和评估光稳定性.
主要成果:
- 取得了相当大的反斯托克斯能量增益 (PDI为0.70 eV,四为0.86 eV).
- 证实了Pyr(1) RuPZn(2) 敏感的三倍三倍灭绝 (TTA) 光化学.
- 获得了0.86 eV的反斯托克斯转移记录,用于敏感的TTA.
- 在几个小时内证明了Pyr{1) RuPZn{2) /PDI系统的优良光稳定性.
结论:
- (II) 超分子有效地使TTA敏感,从而有效地将NIR光子转化为可见光子.
- 该系统实现了创纪录的反斯托克斯能量增益,展示了其潜力.
- 这种Pyr(1) RuPZn(2) / PDI组合表现出显著的光稳定性,适合实际应用.
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