【摘要】 以芴和菲为原料进行热缩聚试验，通过偏光显微镜、X射线衍射、拉曼光谱、红外光谱分析缩聚产物的微晶结构，结果表明菲缩聚产物的微晶结构在排列规整度、层间距、微晶尺寸等方面都优于芴缩聚产物。选用茚、茚满、芴、9,9-二甲基芴、荧蒽5种模型化合物进行热缩聚试验，通过气相色谱仪、气相色谱-质谱联用仪分别对气相产物和液相产物的组成及分子结构进行分析，结果表明，茚、茚满、芴、9,9-二甲基芴中的五元环都可以扩环，且9,9-二甲基芴的扩环现象最为明显。为研究9,9-二甲基芴扩环的原因，在茚满、芴、荧蒽中加入一定比例的1-辛烯进行热缩聚试验，发现反应的扩环选择性显著提高，说明合适的额外碳源对扩环反应有明显的促进作用。更多还原

【Abstract】 Thermal polycondensation experiments were conducted on fluorene and phenanthrene. The microcrystalline structures of the polycondensation products of phenanthrene and fluorene were analyzed by means of polarizing microscopy, X-ray diffraction, Raman spectroscopy, and infrared spectroscopy. The results showed that the microcrystalline structure of the polycondensation products of phenanthrene was superior to that of fluorene in terms of arrangement regularity, degree of polycondensation, and microcrystalline size. Five model compounds, namely indene, indan, fluorene, 9,9-dimethylfluorene, and fluoranthene, were selected for the thermal polycondensation experiments. The composition and molecular structure of the gas-liquid product were analyzed by gas chromatography and gas chromatography-mass spectrometry. The results indicated that the quinary rings in indan, indene, fluorene, and 9,9-dimethylfluorene had the potential for ring expansion. Moreover, the ring expansion phenomenon of 9,9-dimethylfluorene was particularly pronounced. To investigate the reasons for the ring expansion phenomenon of 9,9-dimethylfluorene, a certain proportion of olefins was added to indan, fluorene, and fluoranthene. The results showed that its ring expansion selectivity was significantly improved, highlighting the crucial importance of an additional carbon source for the ring expansion reaction.更多还原