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2016 (Engelska)Ingår i: Molecules, ISSN 1431-5157, E-ISSN 1420-3049, Vol. 21, nr 1Artikel i tidskrift (Refereegranskat) Published
Abstract [en]
Abstract: Ditopic binding of various dinitrogen compounds to three bisporphyrin molecular tweezers with spacers of varying conformational rigidity, incorporating the planar ene-diyne (1), the helical stiff stilbene (2), or the semirigid glycoluril motif fused to the porphyrins (3) are compared. Binding constants Ka = 10^4 to 10^6 M^-1 reveal subtle differences between these tweezers, that are discussed in terms of porphyrin dislocation modes. Exciton coupled circular dichroism (ECCD) of complexes with chiral dinitrogen guests provides experimental evidence for the conformational properties of the tweezers. The results are further supported and rationalized by conformational analysis.
Nyckelord
Bisporphyrin tweezers, metalloporphyrins, porphyrinoids, host-guest chemistry, supramolecular chemistry, chirogenesis, chirality transfer, exciton coupled circular dichroism, conformational analysis
Nationell ämneskategori
Organisk kemi Teknik och teknologier
Forskningsämne
Kemi med inriktning mot organisk kemi; Teknisk fysik med inriktning mot nanoteknologi och funktionella material
Identifikatorer
urn:nbn:se:uu:diva-267826 (URN)10.3390/molecules21010016 (DOI)000369485600001 ()
Forskningsfinansiär
Vetenskapsrådet, 621-2012-3379Vetenskapsrådet, 621-2011-4423
2015-11-272015-11-272023-08-28Bibliografiskt granskad