Solvent Dependent Structures of Hydrogen-Bonded Organic Frameworks of 2,6-Diaminopurine

Three solvent dependent structures
of 2,6-diaminopurine in N,N′-dimethylforamide
(DAP-1-DMF), water (DAP-2-H2O), and methoxybenzene (DAP-3-CH3OC6H5) have been structurally characterized.
They exhibit different structures because of the different involvement
of solvent molecules in the hydrogen bonded frameworks. The DAP molecules
tend to be self-assembled with other DAP molecules through hydrogen
bonding interactions. DAP has very similar hydrogen bonding interaction
patterns to the established DAT group (2,4-diaminotriazinyl), underlying
the potential of this new unit for the construction of porous hydrogen
bonded organic frameworks.