具有级联能量转移的全色光吸收[70]富勒烯-苝酰亚胺-BODIPY 三联体作为高效单重态氧敏化剂。
Panchromatic Light-Absorbing [70]Fullerene-Perylene-BODIPY Triad with Cascade of Energy Transfer as an Efficient Singlet Oxygen Sensitizer.
机构信息
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei 230601, China.
Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China.
出版信息
Molecules. 2023 Apr 17;28(8):3534. doi: 10.3390/molecules28083534.
A panchromatic light-absorbing [70]fullerene-perylene-BODIPY triad () was synthesized and applied as a heavy atom-free organic triplet photosensitizer for photooxidation. The photophysical processes were comprehensively investigated by the methods of steady-state spectroscopy, time-resolved spectroscopy, as well as theoretical calculations. shows a strong absorption ability from 300-620 nm. Efficient cascading intramolecular singlet-singlet energy transfer in was confirmed by the luminescence study. The backward triplet excited state energy transfer from C moiety to perylene then occurs to populate perylene*. Thus, the triplet excited states of are distributed on both C and perylene moiety with lifetimes of 23 ± 1 μs and 175 ± 17 μs, respectively. exhibits excellent photooxidation capacity, and its yield of singlet oxygen reaches 0.82. The photooxidation rate constant of is 3.70 times that of and 1.58 times that of MB, respectively. The results in this paper are useful for designing efficient heavy atom-free organic triplet photosensitizers for practical application in photovoltaics, photodynamic therapy, etc.
全色光吸收[70]富勒烯-苝酰亚胺-BODIPY 三联体（）被合成并用作无重原子的有机三重态光引发剂用于光氧化。通过稳态光谱法、时间分辨光谱法以及理论计算等方法全面研究了光物理过程。显示出从 300-620nm 的强吸收能力。通过发光研究证实了在中存在有效的分子内单重态-单重态能量转移。然后，C 部分的反向三重态激发态能量转移到苝上，从而使苝*上充满三重态激发态。因此，三重态激发态分布在 C 和苝部分上，寿命分别为 23±1μs 和 175±17μs。表现出优异的光氧化能力，其单线态氧产率达到 0.82。的光氧化速率常数分别是和 MB 的 3.70 倍和 1.58 倍。本文的结果有助于设计高效的无重原子有机三重态光引发剂，用于光电器件、光动力疗法等实际应用。
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