Polymers with precise structures possess important roles in biomedicine,information storage,hierarchical assembly,etc.,while their preparation has always been a challenge in the field of polymer synthesis.N-Methyliminodiacetic acid(MIDA)boronates,employed as tags in liquid-phase iterative synthesis,were widely utilized in Suzuki-Miyaura coupling reactions as stable boronic acid precursors for the construction of a variety of organic molecules.In this study,four monomers with different structures of thiophene-phenyl side chains were prepared based on MIDA boronates tags.Precise aryl side-chain linkages were created through several coupling reactions between boronic acids and aryl bromides containing MIDA boronates.Further MIDA boronates can be converted into hydroxyl functional groups,allowing for further modification and introduction of vinyl functional groups to synthesize polymerizable monomers.Different monomers were employed in the controlled radical polymerization to yield polymers with precisely controlled side-chain structures.UV-Vis and fluorescence spectra of the polymers revealed distinct optical properties based on different side-chain structures,while similarities in thermal and crystalline properties were observed due to their identical main-chain structures and similar side-chain compositions.This work establishes a methodology for synthesizing precisely controlled side-chain monomers using MIDA boronate labels,providing insights and feasible approaches for the accurate modulation of polymer side chains.
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