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- Title
Cationic and Neutral Rotaxanes Having Different Functional Groups in the Axle Molecule and Their Coordination to Pt<sup>II</sup>.
- Authors
Yu, Gilbert; Suzaki, Yuji; Osakada, Kohtaro
- Abstract
Dibenzo[24]crown-8 (DB24C8) forms rotaxanes with a linear molecule having a dialkylammonium group and a triazole group as well as with the acetylation product of a cationic axle molecule. The former cationic rotaxane is stabilized by multiple intermolecular hydrogen bonds between the NH2+ and oxyethylene groups. The neutral rotaxane contains the macrocycle in the vicinity of the terminal aryl group. The co-conformation of both the cationic and neutral rotaxanes can be fixed by coordination of the triazole group of the axle molecule to PtCl2(dmso)2. A 1H NMR spectroscopic study on the thermodynamics of the Pt coordination revealed a larger association constant for the rotaxanes than for the corresponding axle molecules and a larger value for the neutral rotaxane than for the cationic rotaxane.
- Subjects
MOLECULAR structure of rotaxanes; TRIAZOLES synthesis; MACROCYCLIC compound synthesis; NUCLEAR magnetic resonance spectroscopy; PLATINUM compounds
- Publication
Chemistry - An Asian Journal, 2017, Vol 12, Issue 3, p372
- ISSN
1861-4728
- Publication type
Article
- DOI
10.1002/asia.201601554