Frontispiz: Fused Indacene Dimers

Synthesis of directly fused porphyrin dimers through Fe(OTf)3-mediated oxidative coupling.

An efficient and general Fe(OTf)3-mediated oxidative coupling method was developed for the synthesis of doubly or triply linked porphyrin dimers. Besides the central metal and peripheral substituent, regioselectivity of the oxidative coupling was found to be closely relevant to the onset oxidation potential of the porphyrin substrate, and the reactant with higher E(onset(ox)) tends to generate ...

Synthesis, separation, and characterization of the topoisomers of fused bicyclic subphthalocyanine dimers.

2,6-Dibenzyl-1,2,3,5,6,7-hexahydro-2,4,6,8-tetraaza-s-indacene and 2,6-bis(4-methoxybenzyl)-1,2,3,5,6,7-hexahydro-2,4,6,8-tetraaza-s-indacene.

The title compounds, C22H22N4 and C24H26N4O2 [alternative names: 2,6-dibenzyl-2,3,6,7-tetrahydro-1H,5H-dipyrrolo[3,4-b; 3',4'-e]pyrazine and 2,6-bis(4-methoxybenzyl)-2,3,6,7-tetrahydro-1H,5H-dipyrolo[3,4-b;3',4'-e]pyrazine], two 1,2,3,5,6,7-hexahydro-2,4,6,8-tetraaza-s-indacene derivatives, are both centrosymmetric and have similar S-shaped structures. In the former, there are two independent m...

Hepatitis B virus capsid assembly Assembly pathway of hepatitis B core virus-like particles from genetically fused dimers

Background: We studied assembly of HBV capsids using a genetically-fused dimer. Results: Assembly intermediates composed of two, three and five copies of a fused dimer have been isolated. Conclusion: Capsid assembly could progress using dimeric, trimeric and pentameric intermediates. Significance: The low abundance and transient nature of assembly intermediates make analysis challenging, howeve...

Ground and excited states of linked and fused zinc porphyrin dimers: Symmetry adapted cluster „SAC...—configuration interaction „CI... study

The symmetry adapted cluster ~SAC!/SAC-configuration interaction method was applied to calculate the ground and excited states of zinc porphyrin monomers ~without and with phenyl groups, ZnP and ZnPPh, respectively! and meso–meso linked (Zn2PMM) and doubly fused (Zn2PDF) zinc porphyrin dimers. Various features of the absorption spectra are studied, clarified, and assigned theoretically. The cal...