Synthesis, excitation energy transfer and singlet oxygen photogeneration of covalently linked N-confused porphyrin–porphyrin and Zn(II) porphyrin dyads

✍ Scribed by Chun-Ting Poon; Shunsheng Zhao; Wai-Kwok Wong; Daniel W.J. Kwong

• Publisher: Elsevier Science
• Year: 2010
• Tongue: French
• Weight: 611 KB
• Volume: 51
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/j.tetlet.2009.11.101

✦ Synopsis

Dyads of a N-confused porphyrin (NCP) moiety covalently linked to a porphyrin free-base (H 2 P) 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 H 2 P/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 (U D = (0.61-0.65) ± 0.13) were better 1 O 2 generators than the NCP-P dyads (U D = (0.36-0.41) ± 0.08).