Details

Autor(en) / Beteiligte

• Pang, Xinchang
• Feng, Chaowei
• Xu, Hui
• Han, Wei
• Xin, Xukai
• Xia, Haiping
• Qiu, Feng
• Lin, Zhiqun

Titel

Unimolecular micelles composed of inner coil-like blocks and outer rod-like blocks crafted by combination of living polymerization with click chemistryElectronic supplementary information (ESI) available. See DOI: 10.1039/c3py01657a

Erscheinungsjahr

2014-03

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A new class of star-shaped coil-rod diblock copolymer polystyrene- block -poly(3-hexylthiophene) (PS- b -P3HT) with well-defined structures and the ratio of coil to rod blocks were synthesized by a combination of atom transfer radical polymerization, the Grignard metathesis method, and click reaction. The star-shaped PS- b -P3HT diblock copolymers covalently connected to a β-cyclodextrin (β-CD) core were composed of 21-arm coil-like PS inner blocks and rod-like conjugated polymer P3HT outer blocks with narrow molecular weight distribution. The intermediate and final products were systematically characterized and confirmed by gel permeation chromatography (GPC), 1 H nuclear magnetic resonance ( 1 H-NMR), and Fourier transfer infrared (FTIR) spectroscopy. The optical properties of star-shaped PS- b -P3HT were examined by UV-Vis absorption and photoluminescence (PL) measurements. In comparison to the linear P3HT, due to their compact structure and the introduction of PS blocks, the optical properties of 21-arm, star-shaped PS- b -P3HT were altered. The star-shaped PS- b -P3HT formed unimolecular micelles in good solvent as revealed by dynamic light scattering (DLS) and atomic force microscopy (AFM) studies. Star-shaped PS- b -P3HT was synthesized via a combination of ATRP, GRIM polymerization, and click reaction. They possessed different properties as compared to their linear analogues