Dendritic nucleotides: interaction with an aliphatic acid monolayer

Area of Science:

• Supramolecular Chemistry
• Nanotechnology
• Biomaterials Science

Background:

• Dendrimers are branched macromolecules with unique structural properties.
• Nucleoside-containing dendrimers offer potential for novel applications in molecular recognition and self-assembly.
• Understanding dendrimer interactions with biological interfaces is crucial for developing advanced materials.

Purpose of the Study:

• To synthesize and characterize novel dendrimers incorporating deoxyadenosine (dA) and deoxythymidine (dT) nucleosides.
• To investigate the self-assembly and interfacial behavior of these nucleoside dendrimers.
• To explore the potential of dendrimeric-T in disrupting and reorienting lipid monolayers.

Main Methods:

• Phosphoramidite chemistry was used for the synthesis of dA and dT dendrimers.
• Ion-exchange chromatography was employed for dendrimer purification.
• Atomic force microscopy (AFM) and scanning tunneling microscopy (STM) were utilized to study dendrimer interactions and interfacial effects.

Main Results:

• Dendrimeric-T and dendrimeric-A, each with 36 nucleotides, were successfully synthesized and purified.
• Atomic force microscopy revealed no specific interactions between the synthesized dendrimers.
• Scanning tunneling microscopy demonstrated that dendrimeric-T disrupts fatty acid monolayers, inducing a head-to-head lipid reorientation.

Conclusions:

• Nucleoside-based dendrimers can be synthesized with controlled branching and nucleotide content.
• Dendrimeric-T exhibits significant interfacial activity, capable of altering the structure of fatty acid monolayers.
• These findings suggest potential applications for nucleoside dendrimers in areas such as drug delivery and surface modification.