四-(对-十二酰氧基)苯基卟啉过渡金属配合物的合成及其液晶行为研究

合成了5,10,15,20-四-(对-十二酰氧基)苯基卟啉(简称TLPPH₂)及其Mn(Ⅲ),Fe(Ⅲ),Co(Ⅱ),Ni(Ⅱ),Cu(Ⅱ)和Zn(Ⅱ)配合物,通过元素分析、紫外可见光谱、红外光声光谱、核磁共振氢谱和摩尔电导等分析方法表征了它们的组成和结构.用DSC和偏光显微镜研究了配体及其锌配合物的液晶行为.结果表明,锌配合物的液晶相变温度始于-50.67℃,相区宽度达143℃.

Synthesis of Tetra(4-n-lauryloyloxyphenyl)porphyrin Complexes and Its Liquid Crystalline Characterization

Tetra-(4-n-lauryloxyphenyl)porphyrin and its complexes of Mn(Ⅲ), Fe(Ⅲ), Co(Ⅱ), Ni(Ⅱ), Cu(Ⅱ) and Zn(Ⅱ) have been synthesized. The compounds were determined and measured by elemental analysis, UV-Vis, FTIR photoacoustic spectrum, 1HNMR and molar conductivity. The Fourier transform infrared photoacoustic of TLPPH2 and its complexes in the range of 3 600-190cm-1 were measured and investigated. The vibration coupling between the M-N stretching and the porphyrin ring deformation appears at 250.0cm-1. The band at 320cm-1 is due to M-Cl stretching vibration. Metal sensitive bands were found at～1352, ～1018, ～993, ～800 and 231cm-1. The stability and the structure of the liquid crystalline phases are examined by optical microscopy and differential scanning calorimetry(DSC). Zn complex exhibits lower phase transition temperature at-50.67 ℃ and wide mesophase range at 143 ℃.