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.

已对2,6-二氨基嘌呤（2,6-diaminopurine）在三种溶剂中的溶剂依赖性结构完成表征：对应的三个结构体系分别为N,N'-二甲基甲酰胺体系（记为DAP-1-DMF）、水体系（记为DAP-2-H₂O）以及苯甲醚体系（记为DAP-3-CH₃OC₆H₅）。由于溶剂分子在氢键骨架中的参与方式与程度存在差异，这三种结构呈现出截然不同的空间构型。2,6-二氨基嘌呤（简称DAP）分子倾向于通过氢键相互作用与其他DAP分子发生自组装。DAP的氢键相互作用模式与已被广泛确立的DAT基团（2,4-二氨基三嗪基，2,4-diaminotriazinyl）高度相似，这表明该新型结构单元在构建多孔氢键有机框架材料方面具备潜在应用价值。