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Electrical, thermal behaviors and synthesis of intramolecular cobalt phthalocyanine with single-chain polymer structure
Polymer Bulletin ( IF 3.2 ) Pub Date : 2019-07-01 , DOI: 10.1007/s00289-019-02871-3
Fatih Biryan , Hülya Tuncer , Kadir Demirelli

Firstly, poly[4-(4-vinylbenzyl)oxy)phthalonitrile]-co-styrene, [poly(VBOP- co -St], which is used as a linear copolymer precursor containing phthalonitrile pendant group was prepared from copolymerization of VBOP and St by atom transfer radical polymerization method at 110 °C. Then, complex synthesis of cobalt phthalocyanine in the single-chain polymer (SCP-CoPc complex) via the intramolecular macrocyclization reaction of cobalt and phthalonitrile group in poly(VBOP- co -St) was carried out at 150 °C in the presence of excess cyclohexanol. Both linear copolymer precursor and formation of cobalt phthalocyanine within a single-chain polymer were confirmed by FT-IR, 1 H-NMR, 13 C-NMR and UV/Vis spectroscopy techniques. Particularly, the formation of SCP-CoPc complex was characterized by almost disappearance of –C≡N band at 2230 cm −1 of the FT-IR and appearance of Q band around 672 nm and the B band in the near UV region at 350 nm of UV/Vis spectroscopy. The pure poly(VBOP- co -St), SCP-CoPc complex and the residue SCP-CoPc complex heated to 500 °C were characterized by SEM images, and the element analyses were estimated from X-ray energy dispersive spectroscopy (X-ray EDS). The EDS elemental analysis results of the residual of SCP-CoPc complex degraded to 500 °C showed that CoO [cobalt(II)oxide] compound occurred. The thermal properties of poly(VBOP- co -St) and SCP-CoPc complex were investigated through thermogravimetric analysis and differential scanning calorimeter. The conducting nanographene-based SCP-CoPc composites were prepared. DC and AC electrical conductivity and dielectric properties were investigated. The ac dielectric measurements of poly(VBOP- co -St), SCP-CoPc complex and composites were investigated at room temperature between 100 and 20 kHz depending on the alternating current conductivities. Also, the activation energy profile of SCP-CoPc/4% (by wt) nanographene composite was revealed by measuring the DC conductivity of individual composite material.

中文翻译:

具有单链聚合物结构的分子内钴酞菁的电、热行为及合成

SCP-CoPc 复合物的形成特征是在 FT-IR 的 2230 cm -1 处 –C≡N 带几乎消失,在 672 nm 附近出现 Q 带,在 350 nm 的近紫外区出现 B 带/可见光谱。纯聚(VBOP-co-St)、SCP-CoPc 复合物和残留的 SCP-CoPc 复合物加热到 500 °C 用 SEM 图像表征,元素分析通过 X 射线能量色散光谱(X 射线EDS)。降解至500℃的SCP-CoPc复合物残留物的EDS元素分析结果表明,发生了CoO[氧化钴(II)]化合物。通过热重分析和差示扫描量热仪研究了聚 (VBOP-co-St) 和 SCP-CoPc 复合物的热性能。制备了基于导电纳米石墨烯的 SCP-CoPc 复合材料。研究了 DC 和 AC 电导率和介电特性。聚 (VBOP-co-St)、SCP-CoPc 复合物和复合材料的交流介电测量在室温 100 到 20 kHz 之间进行了研究,具体取决于交流电导率。此外,通过测量单个复合材料的直流电导率,揭示了 SCP-CoPc/4%(按重量)纳米石墨烯复合材料的活化能分布。
更新日期:2019-07-01
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