可程控的光化学除氧在光子上转换的应用

本文探讨了可程控的光化学除氧技术在光子上转换领域的应用，旨在开 发一种新的控制方法，以调控光子上转换过程中的三重激发态，并且通过三重态-三重态湮灭过程激活高能量的光子，最终开发光子上转换领域新的功 能和应用场景。研究聚焦于 3D 打印与手性超分子凝胶两个领域，旨在解决 这些领域中存在的技术挑战。一方面，本文提出了一种可控光化学除氧光固 化策略，使用钯（II）四苯基四苯并卟啉（PdTPBP）作为代表性的金属三重 态卟啉分子，在二甲基亚砜（DMSO）溶液中进行光化学除氧能力的评估， 并验证了其三重态-三重态湮灭上转换的特性。通过灰度数字光处理（DLP） 策略实现了氧气浓度的时空控制，精确控制了光固化位置和程度，提出了一 种新的在 z 轴上控制聚合程度的方法，并且将 3D 打印的光响应范围拓展至 红光和近红外光。另一方面，研究建立了一种在空气氛围下实现“非手性磷 光客体-手性超分子凝胶主体”圆偏振发光的方法，并研究了三重态-三重态 湮灭上转换对手性传递的影响。选取具有光活化除氧功能的手性超分子凝胶 作为主体，以及铂(II)八乙基卟啉（PtOEP）和对（二酚基）蒽（DPOA）作 为磷光和荧光客体发光分子，分析了主客体间的手性传递与圆偏振发射现象， 并表征了客体分子的光物理和光化学性质，为可除氧的手性超分子凝胶领域 的圆偏振发光研究提供了新的视角。 本研究的成果表明，可控光化学除氧方法在 3D 打印技术和手性超分子 凝胶领域具有应用潜力，为光子上转换技术的新功能和新应用提供了研究方向。

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