Synthesis of Monodisperse Sequence-Coded Polymers with Chain Lengths above DP100

Area of Science:

• Synthetic chemistry
• Polymer science
• Biotechnology

Background:

• Polyphosphates are versatile macromolecules with potential applications in various fields.
• Developing methods for synthesizing non-natural, sequence-encoded polyphosphates is crucial for expanding their utility.
• Existing synthesis methods may have limitations in controlling sequence and chain length.

Purpose of the Study:

• To develop a robust phosphoramidite approach for synthesizing sequence-encoded non-natural polyphosphates.
• To demonstrate the ability to create high molecular weight polyphosphates with defined sequences.
• To characterize the synthesized polymers for chain length and sequence fidelity.

Main Methods:

• Utilized a DNA synthesizer for solid-phase synthesis of polyphosphates.
• Employed two specific phosphoramidite monomers (0 and 1) to form binary-coded sequences.
• Used controlled pore glass as a solid support and a large excess of monomers.
• Characterized synthesized homopolymers and copolymers using techniques to determine chain length and purity.

Main Results:

• Successfully synthesized non-natural, sequence-encoded polyphosphates with high chain lengths.
• Produced monodisperse polymers containing up to 104 coded monomer units.
• Demonstrated high efficiency of phosphoramidite coupling steps.
• Confirmed the ability to create binary-coded sequences within the polyphosphate backbone.

Conclusions:

• The phosphoramidite approach is highly efficient for synthesizing long, information-containing non-natural macromolecules.
• This method provides a powerful tool for creating novel polyphosphate structures with tailored sequences.
• The synthesized polymers hold promise for applications requiring precise molecular architecture.