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Inne
Protonated N-confused porphyrin dimer: formation, structure, and guest binding.
Autorzy
Rok wydania
2011
Czasopismo
Numer woluminu
50
Strony
6719-6736
DOI
10.1021/ic200742d
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The protonation of 3,3′-bis(meso-tetratolyl-2-aza-21-carbaporphyrin) with various acids was studied. The stepwise formation of mono-, di-, and tetracationic species was shown on the basis of UV–vis–near-IR and low-temperature 1H NMR. Upon going from di- to tetraprotonated form, the bis(porphyrinoid) skeleton changes its conformation from cisoid to bent-transoid, which was found by single-crystal X-ray analyses, 2D NMR, and density functional theory (DFT) calculations. The formation of cation–anion complexes was established in both the solid state and solution. The substitution of anions was studied by spectrophotometric and 1H NMR titrations. A pronounced decrease of the HOMO–LUMO gap in the tetraprotonated species was shown by cyclovoltametry and time-dependent DFT calculations.
Adres publiczny
https://doi.org/10.1021/ic200742d
Strona internetowa wydawcy
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