DyNAs: constitutional dynamic nucleic acid analogues.
Dynamic cationic polymers were generated in aqueous media from functionally complementary monomers bearing nucleobase groups. (1)H NMR spectroscopy was used to follow the polycondensation reaction of the nucleobase-appended dihydrazides 1 and 2 with the dialdehydes B and C. The reversibility of these polymers was established by proton NMR spectroscopy through exchange of the dihydrazide 2 with polymer 1 B. The polymers 1 B, 2 B, 1 C, and 2 C represent dynamic biopolymers of nucleic acid type, DyNAs. Electrostatic interaction of these polymers with polyanionic entities, such as polyphosphates, polynucleotides, and polyaspartic acid, was shown to take place. It induces a change in size of the dynamic polymer, as it responds by an increase in degree of polymerization to an increase of the overall anionic charge introduced, that is, to the total electrostatic interaction.
Sreenivasachary
Nampally
N
Institut de Science et d'Ingénierie Supramoléculaires, Université Louis Pasteur, 8 Allée Gaspard Monge, 67000 Strasbourg, France.
Hickman
David T
DT
Sarazin
Dominique
D
Lehn
Jean-Marie
JM
D000447:Aldehydes / Q000737:chemistry; D000838:Anions / Q000737:chemistry; D002412:Cations / Q000737:chemistry*; D006834:Hydrazines / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009696:Nucleic Acids / Q000737:chemistry*; D010455:Peptides / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D011122:Polyphosphates / Q000737:chemistry; D055672:Static Electricity; D013997:Time Factors
D000447:Aldehydes; D000838:Anions; D002412:Cations; D006834:Hydrazines; D009696:Nucleic Acids; D010455:Peptides; D011108:Polymers; D011122:Polyphosphates; C017645:polyaspartate; C029424:hydrazine