precipitation in MeOH. The branched polysilane was analyzed by GPC, NMR and IR spectroscopy after quenching with MeMgBr and additionally after precipitation in MeOH. Opto-electronic properties were tested by UV/Vis and PL spectroscopy. Thermal properties were examined via TGA and DSC. The synthesized polysilane is usable as a soluble precursor for the preparation of SiC, not least due to its high silicon
通过使新型单体经受普通的Wurtz型还原偶联反应条件,合成了烃可溶的,甲基取代的高度支化的聚
硅烷。为此目的,使用三
氯取代的三
硅烷(ClMe 2 Si)2 SiMeCl(1)作为单体。使用分散在
甲苯中的
钠在较高的温度下进行聚合。4小时后,通过添加MeMgBr终止反应,并在MeOH中沉淀。用MeMgBr淬灭后,另外在MeOH中沉淀后,通过
GPC,NMR和IR光谱分析支化的聚
硅烷。通过UV / Vis和PL光谱法测试光电性能。通过检查热性能TGA和
DSC。合成的聚
硅烷可用作制备SiC的可溶性前体,这不仅是由于其高
硅含量。通过1 H NMR,IR和UV / Vis光谱在不同温度下检查热解过程中的
化学过程。XRPD分析,红外光谱,HR-
SEM-EDS和元素分析证实了β-SiC的成功形成。