Synthesis, excitation energy transfer and singlet oxygen photogeneration of covalently linked N-confused porphyrin-porphyrin and Zn(II) porphyrin dyads |
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| Authors: | Chun-Ting Poon Wai-Kwok Wong Daniel WJ Kwong |
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| Institution: | a Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, PR China
b Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Kowloon Tong, Hong Kong, PR China |
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| Abstract: | Dyads of a N-confused porphyrin (NCP) moiety covalently linked to a porphyrin free-base (H2P) or a zinc(II) porphyrinate (ZnP) moiety via a flexible alkyl chain of variable length have been synthesized. Photoluminescence study demonstrated an efficient excitation energy transfer from H2P/ZnP moiety to the NCP moiety. Measurement of the near-IR emission of singlet oxygen produced by these dyads via photosensitization showed that the NCP-ZnP dyads (ФΔ = (0.61-0.65) ± 0.13) were better 1O2 generators than the NCP-P dyads (ФΔ = (0.36-0.41) ± 0.08). |
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| Keywords: | N-confused porphyrin Porphyrin Bisporphyrin Energy transfer Singlet oxygen |
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