Acta Phys. -Chim. Sin. ›› 1997, Vol. 13 ›› Issue (01): 11-15.doi: 10.3866/PKU.WHXB19970103
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Li Xi-You,Tian Hong-Jian,Zhou Qing-Fu,Xu Hui-Jun
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Abstract:
Intramolecular energy-transfer and electron-transfer of porphyrin-phthalocyanine heterodimer, linked by piperazine, were investigated by absorption and fluorescencc spectroscopy. The efficiency of energy transfer(ФEnT) and electron transfer (ФET) were calculated. The results indicate that: In benzene, the main photophysical process is excited singlet-singlet energy transfer, while in DMF photoinduced electron transfer predominant. The ФET of this heterodimer in DMF is bigger than that of porphyrin-phthalocyanine heterodimers linked by oxygen or flexible chains. This may be ascribed to the "boat-form" conformation of piperazine, According to the CPK molecular model, porphyrin and phthalocyanine are held together in a face to face way, and the center to center distance between two macrorings is about 3.56 Å . It is suggested that conformational changes from "chair form" to "boat form" occurred subsequent to optical excitation in DMF.
Key words: Piperazine, Heterodimer, Intramolecular energy transfer, Photoinduced electron transfer
Li Xi-You,Tian Hong-Jian,Zhou Qing-Fu,Xu Hui-Jun. The Photophysical Process of A New Kind of Porohyrin-Phthalocyanine Heterodimer[J].Acta Phys. -Chim. Sin., 1997, 13(01): 11-15.
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http://www.whxb.pku.edu.cn/EN/Y1997/V13/I01/11
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