Simple improvements to Gilch synthesis and molecular weight modulation of MEH-PPV,Polymer Chemistry

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Simple improvements to Gilch synthesis and molecular weight modulation of MEH-PPV
Polymer Chemistry ( IF 4.1 ) Pub Date : 2020-03-19 , DOI: 10.1039/d0py00072h
Riley O'shea _{1,

2,

3,

4,

5} , Wallace W. H. Wong _{1,

2,

3,

4,

5}

Affiliation

The solvent and temperature used in the Gilch synthesis of poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) were varied to achieve an improved set of reaction conditions. A range of molecular weights from 20 to 500 kg mol⁻¹ were obtained in moderate to near-quantitative yields. The best conditions for producing low molecular weight MEH-PPV (32 kg mol⁻¹, 97% yield) was to use n-pentane as the reaction solvent at 25 °C. For high molecular weight (397 kg mol⁻¹, 65% yield), toluene at 55 °C gave the best result. The photophysical properties for all MEH-PPV samples were examined and no significant variation was found between samples obtained under different polymerization conditions.

中文翻译：

简单改进MEH-PPV的Gilch合成和分子量调节

改变聚[2-甲氧基-5-（2-乙基己氧基）-1,4-亚苯基亚乙烯基]（MEH-PPV）的Gilch合成中所用的溶剂和温度，以改善一组反应条件。以中等至接近定量的产率获得了20至500kg mol ^-1的分子量范围。制备低分子量MEH-PPV（32 kg mol ^-1，产率97％）的最佳条件是在25°C下使用正戊烷作为反应溶剂。对于高分子量（397 kg mol ^-1，65％的收率），甲苯在55°C时可获得最佳结果。检查了所有MEH-PPV样品的光物理性质，在不同聚合条件下获得的样品之间未发现明显变化。

更新日期：2020-03-19

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