Alternating copolymers with glycyl-glycine and alanyl-alanine side-chain pendants: synthesis, characterization and solution properties. Issue 9 (1st September 2020)

• Record Type: Journal Article
• Authors: Goswami, Krishna Gopal; Saha, Biswajit; De, Priyadarsi
• Is Part Of: Journal of macromolecular science. Volume 57:Issue 9(2020)
• Page Start: 675
• Page End: 683
• Publication Date: 2020-09-01
• Subjects: Alternating copolymers -- RAFT polymerization -- dipeptide -- sequence controlled polymers -- pH-responsive polymers; Polymers -- Periodicals; Polymerization -- Periodicals; 547.7
• DOI: 10.1080/10601325.2020.1759433
• Languages: English
• ISSNs: 1060-1325

Abstract

Abstract: A series of chiral alternating copolymers based on glycyl-glycine attached styrenic monomer (VG ) and alanyl-alanine tethered maleimide (MA ) are synthesized through reversible addition-fragmentation chain transfer (RAFT) polymerization. The alternating sequential arrangement of the two monomers along the synthetic copolymer chain is systematically established through 1 H and 13 C NMR spectroscopic investigation. The thermal as well as chiroptical characteristics of the copolymers are also studied. Interestingly, the copolymers show unusual luminescence characteristics in different organic solvents under UV light irradiation, whereas in the solid state they emit blue, green and red fluorescence as witnessed from the corresponding fluorescence microscopy micrographs. Furthermore, after successful Boc group removal, the deprotected copolymers show pH-dependent solubility variation in aqueous solution with an almost invariant transition pH with respect to varying chain lengths of the polymers. Thus, the strategy reported herein offers a notable direction to fabricate various dipeptide-based sequence-controlled polymers with promising applications.