TY - JOUR
T1 - Meso-meso-linked subporphyrin dimer
AU - Kitano, Masaaki
AU - Sung, Jooyoung
AU - Park, Kyu Hyung
AU - Yorimitsu, Hideki
AU - Kim, Dongho
AU - Osuka, Atsuhiro
PY - 2013/12/2
Y1 - 2013/12/2
N2 - Directly meso meso linked subporphyrin dimer 5 and 7 were synthesized by Ni-mediated reductive coupling of the corresponding meso-bromosubporphyrins. Dimer 5 exhibited a largely perturbed absorption spectrum, a redshifted and enhanced fluorescence spectrum, higher oxidation potentials with a large potential difference between the first and second oxidation waves, and a long-lived large anisotropy of S1 state. Directly meso meso linked ZnII diporphyrin was prepared by AgI- promoted oxidative dimerization of ZnII porphyrin. The absorption spectrum shows a split Soret band, which can be interpreted in terms of simple exciton coupling of the two ZnII porphyrins without significant conjugative interaction. The high-resolution electrospray ionization time-of-flight (HR ESI-TOF) mass spectrum revealed an intense borenium cation peak at m/z 817.3095. These properties have been interpreted in terms of the effective conjugative interactions of the two subporphyrin units due to the small rotational barrier of the meso meso bond.
AB - Directly meso meso linked subporphyrin dimer 5 and 7 were synthesized by Ni-mediated reductive coupling of the corresponding meso-bromosubporphyrins. Dimer 5 exhibited a largely perturbed absorption spectrum, a redshifted and enhanced fluorescence spectrum, higher oxidation potentials with a large potential difference between the first and second oxidation waves, and a long-lived large anisotropy of S1 state. Directly meso meso linked ZnII diporphyrin was prepared by AgI- promoted oxidative dimerization of ZnII porphyrin. The absorption spectrum shows a split Soret band, which can be interpreted in terms of simple exciton coupling of the two ZnII porphyrins without significant conjugative interaction. The high-resolution electrospray ionization time-of-flight (HR ESI-TOF) mass spectrum revealed an intense borenium cation peak at m/z 817.3095. These properties have been interpreted in terms of the effective conjugative interactions of the two subporphyrin units due to the small rotational barrier of the meso meso bond.
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U2 - 10.1002/chem.201303767
DO - 10.1002/chem.201303767
M3 - Article
AN - SCOPUS:84890971349
VL - 19
SP - 16523
EP - 16527
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
SN - 0947-6539
IS - 49
ER -