Back to Search
Start Over
‘Two-point’-bound supramolecular complexes from semi-rigidified dipyridine receptors and zinc porphyrins
- Source :
-
Tetrahedron . Jul2006, Vol. 62 Issue 29, p6973-6980. 8p. - Publication Year :
- 2006
-
Abstract
- Abstract: Two linear compounds 1 and 2 have been designed and synthesized as new receptors for zinc porphyrins. Both compounds consist of two folded aromatic amide moieties, which are connected with an acetylene linker in 1 or directly in 2. The rigid conformations of their folded moieties are stabilized by intramolecular tri-centered hydrogen bonding, while the whole molecule adopts a ‘S’- or ‘C’-styled conformation depending on the relative orientation of the two rigid moieties. Two pyridine units are introduced at the ends of 1 and 2 for the complexation of zinc porphyrin guests. Although the 1H NMR investigation indicated that both compounds can bind two zinc porphyrin guests at high concentrations (≥5mM) in chloroform, the UV–vis studies revealed that, at low concentration of 1 and 2 (4μM), both compounds complex one zinc porphyrin guest to form structurally unique ‘two-point’-bound 1:1 complexes. The association constants of the 1:1 complexes have been determined with the UV–vis titration experiments. [Copyright &y& Elsevier]
- Subjects :
- *ZINC
*LINE geometry
*HYDROGEN bonding
*MOLECULAR biology
Subjects
Details
- Language :
- English
- ISSN :
- 00404020
- Volume :
- 62
- Issue :
- 29
- Database :
- Academic Search Index
- Journal :
- Tetrahedron
- Publication Type :
- Academic Journal
- Accession number :
- 21187465
- Full Text :
- https://doi.org/10.1016/j.tet.2006.04.082