Induced circular dichroism of disperse red dye in the self-assembled nanoparticles composed of poly (γ-benzyl L-glutamate) and poly (N-isoprophyl acrylamide) and its phase transition by temperature = 폴리벤질글루타메이트와 폴리아이소프로필아크릴아마이드로 구성된 나노입자속에 포함된 디스퍼스레드아이의 원편광이색성과 상전이현상 연구

다국어 초록 (Multilingual Abstract)

The core-shell type nanoparticles composed of poly ( r - benzyl L-glutamate) (PBLG) as hydrophobic part and poly (N-isopropyl acrylamide) (PNIPAAm) or poly (ethylene oxide) (PEO) as hydrophilic one were prepared by diafiltration method. The disperse red(DR) dyes in the α-helical PBLG core of the GE and GN nanoparticles were self-associated with H-aggregates. The CD of DR in the nanoparticles was induced by chiral microenvironment of PBLG core and affected by the temperature accompanying the orientation change of DR,s, The interaction between excited state of DRs in GE or GN nanoparticles gave an induced circular dichroism(ICD) curve centered at 400 nm which coincided with the λmax in the UV region of DR. In contrast to DRs in the GE nanoparticles, DRs in the GN nanoparticle exhibited a reversible ICD peak and order-disorder phase transition with temperature changes due to the conformational change of PNIPAAm chain from expanded type to compact one above LCST of PNIPAAm.