Controlling molecularity and stability of hydrogen bonded G-quadruplexes by modulating the structure's periphery†
Abstract
We report on self-assembly of guanosines with aromatic esters at their 5′-position. Depending on the basicity of the 5′-ester either discrete octamers G8·K+I− or hexadecamers G16·3K+3I− are formed. The thermodynamic and kinetic stabilities of the G-quadruplex can be controlled by interlayer hydrogen-bonding and by dispersion interactions on the assembly's periphery.