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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis, characterization, thermal analysis, and band gap of oligo-2-methoxy-6-[(4-methylphenyl)imino]methylphenol
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Synthesis, characterization, thermal analysis, and band gap of oligo-2-methoxy-6-[(4-methylphenyl)imino]methylphenol

机译：寡聚-2-甲氧基-6-[（4-甲基苯基）亚氨基]甲基苯酚的合成，表征，热分析和能带隙

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摘要

The oxidative polycondensation reaction conditions of 2-methoxy-6-[(4-methylphenyl)imino]methylphenol (2M-4-MPIMP) by using oxidants such as air 02, H2O2 and NaOCl were studied in an aqueous alkaline medium between 30 and 90 degrees C. The structures of synthesized monomer and oligomer were confirmed by FTIR, UV-vis, H-1 NMR, (CNMR)-C-13, and elemental analysis. The characterization was made by TG-DTA, size exclusion chromatography (SEC), and solubility tests. At the optimum reaction conditions, the yield of oligo (O)-2M-4-MPIMP was 68% for air O-2 oxidant, 68% for H2O2 oxidant, and 82% for NaOCl oxidant. According to the SEC analysis, the number-average molecular weight (M-n), weight-average molecular weight (M-w), and polydispersity index (PDI) values of O-2M-4-MPIMP were found to be 695, 1000 g mol(-1) and 1.439, using air O-2, and 670, 795 g mol(-1) and 1.187, using NaOCl, and 645, 790 g mol(-1) and 1.225, using H2O2, respectively. TG-DTA analyses were shown to be stable of O-2M-4-MPTMP against thermal decomposition. The weight losses of 2M-4-MPIMP and O-2M-4-MPIMP were found to be 98.46%, and 89.54% at 1000 degrees C, respectively. Also, electrical conductivity of the O-2M-4-MPIMP was measured, showing that the polymer is typical semiconductor. The highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) of monomer and oligomer were determined from the onset potentials for n-doping and p-doping, respectively. Optical energy gaps (E-g) of 2M-4-MPIMP and O-2M-4-MPIMP were calculated from UV-vis measurements. (c) 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 3417-3426, 2007.
机译：在30至90之间的碱性水溶液中研究了2-甲氧基-6-[（4-甲基苯基）亚氨基]甲基苯酚（2M-4-MPIMP）通过使用氧化剂如空气O 2，H 2 O 2和NaOCl的氧化缩聚反应条件。 FTIR，UV-vis，H-1 NMR，（CNMR）-C-13和元素分析证实了合成的单体和低聚物的结构。通过TG-DTA，尺寸排阻色谱法（SEC）和溶解度测试进行表征。在最佳反应条件下，空气O-2氧化剂的低聚物（O）-2M-4-MPIMP的产率为68％，H2O2氧化剂的产率为68％，NaOCl氧化剂的产率为82％。根据SEC分析，发现O-2M-4-MPIMP的数均分子量（Mn），重均分子量（Mw）和多分散指数（PDI）值为695，1000 g mol（ -1）和1.439，使用空气O-2;分别使用670、795 g mol（-1）和1.187，使用NaOCl;以及645，790 mol（-1）和1.225，使用H2O2。 TG-DTA分析显示O-2M-4-MPTMP对热分解稳定。发现在1000℃下2M-4-MPIMP和O-2M-4-MPIMP的重量损失分别为98.46％和89.54％。另外，测量了O-2M-4-MPIMP的电导率，表明该聚合物是典型的半导体。单体和低聚物的最高占据分子轨道（HOMO）和最低未占据分子轨道（LUMO）分别根据n掺杂和p掺杂的起始电位确定。根据紫外可见测量计算出2M-4-MPIMP和O-2M-4-MPIMP的光能隙（E-g）。 （c）2007 Wiley Periodicals，Inc. J Appl Polym Sci 104：3417-3426，2007。

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