Synthesis and Characterization of Novel Polyamides Containing Purine Moiety

The role of intramolecular and intermolecular hydrogen bonding effect for adenine-containing polyimide films

“…The 6-chloropurine (7.73 g, 50 mmol), 2-methoxy-4-nitroaniline (8.83 g, 52.5 mmol), and DMF/pentanol (35 mL/35 mL) were added into a 250 mL three-necked flask in nitrogen protection. 26 After stirring at 90°C for 10 h. The precipitated was filtered off, and the yellow solid was washed with ethyl alcohol and then it was dried by vacuum oven at 100°C for 12 h. the yield of MeO-NPA is 35.6% (5.10 g), 1 H-NMR (300MHz, DMSO- d 6 , δ , ppm): 10.49 (s, 1H, -NH-), 8.94–8.96 (d, Ar-H), 8.58 (s, 1H), 8.42 (s, 1H), 8.02–8.03 (s, Ar-H), 7.89 (s, Ar-H), 6.44(s, 1H, Ar-NH-).…”

“…The 6-chloropurine (7.73 g, 50 mmol), 2-methoxy-4-nitroaniline (8.83 g, 52.5 mmol), and DMF/pentanol (35 mL/35 mL) were added into a 250 mL three-necked flask in nitrogen protection. 26 After stirring at 90°C for 10 h. The precipitated was filtered off, and the yellow solid was washed with ethyl alcohol and then it was dried by vacuum oven at 100°C for 12 h. the yield of MeO-NPA is 35.6% (5.10 g), 1 N-(2-methoxy-4-nitrophenyl)-9-(4-nitrophenyl)-9H-purin-6amine (b-H-MeO-NPA). MeO-NPA (8.59 g, 30 mmol) and NaH (60%, 1.2 g, 30 mmol) were added into a 500 mL there-necked flask (which was equipped with stirring bar and connected with constant pressure funnel).…”

A New Adenine-Derived Physical Dispersion System for Graphene/Polyimide Composites

“…In fact, adenine and its derivatives have received much attention in the field of metal–organic-frameworks (MOFs) and optic–electric materials followed by their bioactivity . Additionally, many research efforts were focused on the potential of functionality for bio-based artificial polymer which contained biomass fragment or featured a chemical structure, such as amino acids or a cellulose derivative. , Considering the unique aromatic heterocyclic structure as well as its flexible molecular tunability, we believe that adenine is a potential molecular platform and multilevel building-block for designing high-performance polymers. , In our previous work, adenine has been successfully introduced into a PI backbone through a novel adenine-based diamine ( p -APA). The derived adenine-containing polyimides (API) exhibit excellent properties due to the intermolecular or interchain hydrogen bonding effect. − …”

“…26,27 Considering the unique aromatic heterocyclic structure as well as its flexible molecular tunability, we believe that adenine is a potential molecular platform and multilevel building-block for designing high-performance polymers. 28,29 In our previous work, adenine has been successfully introduced into a PI backbone through a novel adenine-based diamine (p-APA). The derived adenine-containing polyimides (API) exhibit excellent properties due to the intermolecular or interchain hydrogen bonding effect.…”