采用Langmuir-Blodgett(LB)技术,在23mN/m的膜压下制备了四苯基卟啉铜(CuTPP)、四苯基卟啉锌(ZnTPP)及四苯基卟啉镍(NiTPP)超薄膜。分析了CuTPP、ZnTPP及NiTPP的LB膜分别对乙酸乙酯气体和四氢呋喃气体的紫外光谱变化,并通过薄膜对紫外-可见吸收光谱的变化阐述了构建有机气体-金属卟啉色谱探测阵列的可行性。实验结果表明,无论针对乙酸乙酯气体还是四氢呋喃气体,ZnTPP薄膜光谱变化最明显,CuTPP薄膜次之,而NiTPP薄膜几乎没有光谱变化。因此认为CuTPP和ZnTPP可作为色谱阵列单元识别乙酸乙酯气体和四氢呋喃气体(THF)。
In this paper, CuTPP, ZnTPP and NiTPP thin films are prepared at a constant surface pressure of 23mN/m by LB technology. The changes of UV-Vis absorption spectra of CuTPP, ZnTPP and NiTPP LB films exposed in ethyl acetate and THF vapor are analyzed respectively. The feasibility of building the organic vapor-metalloporphyrins chromatogram array is explained. ZnTPP film exhibits the greatest spectrum change to both ethyl acetate and THF vapor, and CuTPP film takes second place, while NiTPP film exhibits almost no change. ZnTPP film and CuTPP film are feasible to be basic cells of chromatogram array to identify ethyl acetate and THF vapor.