Abstract:
:The synthesis and the properties of 1,4-dibutoxy-2,3-dicyanotriptycene, of a metal-free tetradibenzobarrelenooctabutoxyphthalocyanine, and of the corresponding zinc phthalocyanine are described. The two phthalocyanines do not aggregate when dissolved in benzene at concentrations up to 450 microM. For the metal-free and the zinc compounds, the red band maxima are at 736 and 757 nm, the triplet maxima are at 590 and 605 nm, the triplet state lifetimes are 58 and 177 microseconds, and the protoporphyrin-IX dimethyl ester-to-compound bimolecular rate constants for triplet energy transfer are 2.61 x 10(8) and 1.47 x 10(8) M-1 s-1. Triplet energy transfer from the metal-free compound to O2 is endoergonic by 1.0 kcal mol-1. The potential of the zinc compound for photodynamic therapy is touched upon.
journal_name
Photochem Photobioljournal_title
Photochemistry and photobiologyauthors
Rihter BD,Bohorquez MD,Rodgers MA,Kenney MEdoi
10.1111/j.1751-1097.1992.tb08510.xsubject
Has Abstractpub_date
1992-05-01 00:00:00pages
677-80issue
5eissn
0031-8655issn
1751-1097journal_volume
55pub_type
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