TY - JOUR
T1 - Solution and solid state interplay of isomeric 4′-(pyridyl)-3, 2′:6′,3″-terpyridines with p-sulfonatocalix[4]arene
AU - Smith, Christopher B.
AU - Makha, Mohamed
AU - Raston, Colin L.
AU - Sobolev, Alexandre N.
PY - 2007/4/16
Y1 - 2007/4/16
N2 - p-Sulfonatocalix[4]arene, 1, forms inclusion complexes with the three isomeric 4′-(pyridyl)-3,2′:6′,3″-terpyridines in acidic aqueous medium. Both 4′-(2-pyridyl)-, 3, and 4′-(3′-pyridyl)- 3,2′:6′,3″-terpyridine, 4, form 1: 1 host-guest complexes in the solid state, in which the terminal 4′-(pyridyl) ring resides in the cavity of the calixarene. In the case of 4′-(4-pyridyl)-3,2′: 6′,3″-terpyridine, 5, a molecular capsule is formed in which two calixarenes encapsulate one terpyridine guest molecule, with the terminal pyridine ring being exo to the calixarene cavities. NMR spectroscopy indicates that association between p-sulfonatocalix[4]arene and each terpyridine guest occurs in solution at elevated temperature (333 K) as a prelude to crystallisation of the inclusion complexes.
AB - p-Sulfonatocalix[4]arene, 1, forms inclusion complexes with the three isomeric 4′-(pyridyl)-3,2′:6′,3″-terpyridines in acidic aqueous medium. Both 4′-(2-pyridyl)-, 3, and 4′-(3′-pyridyl)- 3,2′:6′,3″-terpyridine, 4, form 1: 1 host-guest complexes in the solid state, in which the terminal 4′-(pyridyl) ring resides in the cavity of the calixarene. In the case of 4′-(4-pyridyl)-3,2′: 6′,3″-terpyridine, 5, a molecular capsule is formed in which two calixarenes encapsulate one terpyridine guest molecule, with the terminal pyridine ring being exo to the calixarene cavities. NMR spectroscopy indicates that association between p-sulfonatocalix[4]arene and each terpyridine guest occurs in solution at elevated temperature (333 K) as a prelude to crystallisation of the inclusion complexes.
UR - http://www.scopus.com/inward/record.url?scp=34147123567&partnerID=8YFLogxK
U2 - 10.1039/b615508a
DO - 10.1039/b615508a
M3 - Article
AN - SCOPUS:34147123567
VL - 31
SP - 535
EP - 542
JO - New Journal of Chemistry
JF - New Journal of Chemistry
SN - 1144-0546
IS - 4
ER -