Ha. Staab et al., PHOTOINDUCED ELECTRON-TRANSFER IN PORPHYRIN-QUINONE CYCLOPHANES, 17 -DISTANCE DEPENDENCE OF PHOTOINDUCED ELECTRON-TRANSFER - SYNTHESES ANDPROPERTIES OF BIPHENYLENE-SPACERED PORPHYRIN-QUINONE CYCLOPHANES, EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, (10), 1998, pp. 2149-2160
In continuation of previous syntheses of benzene- naphthalene-, and an
thracene-spacered porphyrin-quinone cyclophanes 1, 2, and 4, biphenyle
ne-spacered porphyrin- quinone cyclophanes of structure 3 as the ''mis
sing link'' between 2 and 4 were prepared in multistep syntheses. Thes
e donor-acceptor systems are of interest since, with regard to electro
n-transfer rates, they complete the series of 1, 2, and 4, As expected
the electron-transfer of 3 proceeds 1, 2, and 4, As expected the elec
tron-transfer of 3 proceeds between that of 2 and 4 in an especially s
teep region of distance dependences of electron-transfer rates.