Document Type
Article
Language
eng
Publication Date
2-9-2009
Publisher
Wiley
Source Publication
Chemistry, A European Journal
Source ISSN
0947-6539
Abstract
Water seeds: Complex stoichiometry/composition and degree of oligomerization (oligomeric supramolecular complex formation) of cucurbit[6]uril (CB[6]) with N-alkyl- and N,N′-dialkylpiperazine were investigated in aqueous solutions by means of isothermal titration calorimetry (ITC), ESI-MS, NMR and light scattering measurements. Complex stoichiometry/composition and degree of oligomerization (oligomeric supramolecular complex formation) of cucurbit[6]uril (CB[6]) with N-alkyl- and N,N′-dialkylpiperazine were investigated in aqueous solutions by means of isothermal titration calorimetry (ITC), ESI-MS, NMR and light scattering measurements. It was found that the complex stability and the degree of oligomerization increase with elongating the alkyl chain attached to the piperazine core. X-ray crystallographic studies revealed a clear correlation between the structure of CB[6]–alkylpiperazine crystals obtained from aqueous solutions and the molecular weight/properties of host–guest oligomers existed in the solution as supramolecular “seeds” of crystal formation.
Recommended Citation
Rekharsky, Mikhail V.; Yamamura, Hatsuo; Mori, Tadashi; Sato, Akihiro; Shiro, Motoo; Lindeman, Sergey V.; Rathore, Rajendra; Shiba, Kouhei; Ko, Young Ho; Selvapalam, Narayanan; Kim, Kimoon; and Inoue, Yoshihisa, "Supramolecular Complexation of N-Alkyl- and N,N′-Dialkylpiperazines with Cucurbit[6]uril in Aqueous Solution and in the Solid State" (2009). Chemistry Faculty Research and Publications. 615.
https://epublications.marquette.edu/chem_fac/615
Comments
Accepted version. Chemistry, A European Journal, Vol. 15 No. 8 (February 9, 2009): 1957-1965. DOI. © 2009 Wiley. Used with permission.