Probing the Na+ binding site in a calix[4]arene-guanosine conjugate dimer by solid-state 23Na NMR and quantum chemical calculation.
Using solid-state (23)Na NMR and quantum chemical calculations we have found that the Na(+) ion bound to a calix[4]arene-guanosine conjugate dimer resides slightly above the G-quartet plane and simultaneously coordinates to a water molecule in a square-pyramidal (penta-coordination) geometry.
Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6.
Alan
A
Wong
Frank W
FW
Kotch
Irene C M
IC
Kwan
Jeffery T
JT
Davis
Gang
G
Wu