Light-Up of Rhodamine Hydrazide to Generate Emissive Initiator for Polymerization and to Afford Photochromic Polypeptide Metal Complex.
Polymers (Basel)
; 9(9)2017 Sep 05.
Article
in En
| MEDLINE
| ID: mdl-30965719
ABSTRACT
Ring-opening polymerization (ROP) of cyclic peptide monomer of γ-propargyl-l-glutamate N-carboxyanhydride (PLGâ»NCA) was originally initiated by non-emissive, ring-close rhodamine 6G hydrazide (R-C). However, instantaneously after adding PLGâ»NCA to R-C, the spirolactam ring of R-C was opened by PLGâ»NCA, rendering emissive, ring-open R-O to initiate ROP of PLGâ»NCA. The emissive R-O moiety therefore produced fluorescent Râ»PLG with aggregation-induced emission (AIE) properties. Moreover, Râ»PLG was found to exhibit photochromic properties with good fatigue resistance and long lifetime when forming metal complexes with Sn(II) and Fe(III). In the dark, irradiated metal complexes slowly (~50 min) restored to the initial state. This research provides foundation for the development of new photochromic materials with long lifetime.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Polymers (Basel)
Year:
2017
Document type:
Article
Affiliation country:
Taiwán