Premium
Metal‐Free Poly‐Cycloaddition of Activated Azide and Alkynes toward Multifunctional Polytriazoles: Aggregation‐Induced Emission, Explosive Detection, Fluorescent Patterning, and Light Refraction
Author(s) -
Wu Yongwei,
He Benzhao,
Quan Changyun,
Zheng Chao,
Deng Haiqin,
Hu Rongrong,
Zhao Zujin,
Huang Fei,
Qin Anjun,
Tang Ben Zhong
Publication year - 2017
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201700070
Subject(s) - cycloaddition , azide , fluorescence , polymerization , click chemistry , metal , photochemistry , materials science , polymer chemistry , chemistry , catalysis , polymer , organic chemistry , optics , physics
The metal‐free click polymerization (MFCP) of activated alkynes and azides or activated azide and alkynes have been developed into powerful techniques for the construction of polytriazoles without the obsession of metallic catalyst residues problem. However, the MFCP of activated azides and alkynes is rarely applied in preparation of functional polytriazoles. In this paper, soluble multifunctional polytriazoles (P Ia and P Ib ) with high weight‐average molecular weights ( M w up to 32 000) are prepared via the developed metal‐free poly‐cycloaddition of activated azide and alkynes in high yields (up to 90%). The resultant P Ia and P Ib are thermally stable, and show aggregation‐induced emission characteristics, enabling their aggregates to detect explosives with superamplification effect. Moreover, thanks to their containing aromatic rings and polar moieties, P Ia and P Ib exhibit high refractive indices. In addition, they can also be cross‐linked upon UV irradiation to generate 2D fluorescent patterning due to their remaining azide groups and containing ester groups. Thus, these multifunctional polytriazoles are potentially applicable in the optoelectronic and sensing fields.