GaPO_4-LTA单晶中稠环芳烃类物质(PAHs)的制备与表征

Synthesis and Characterization of Polycyclic Aromatic Hydrocarbons in GaPO_4-LTA Single Crystals

以 γ-甲基吡啶 ( m Py)为模板剂合成了具有 A型分子筛骨架结构的磷酸镓 ( Ga PO4 -LTA)单晶 ,并研究了 m Py在 Ga PO4 -LTA超笼内的高温热解反应 .m Py在 Ga PO4 -LTA笼中热解后形成稠环芳烃类物质PAHs( Polycyclic aromatic hydrocarbons) .这些 PAHs物质的种类与升温速度和终止温度密切相关 .在Ga PO4 -LTA笼中生成的 PAHs可望成为合成富勒烯的前驱体 .

Perfect gallophosphate GaPO 4-LTA single crystals, with the LTA framework structure, were synthesized by using 4-methly pyridine(mPy) as the structure-directing template. And the pyrolysis of mPy was studied in the α-supercage of GaPO 4-LTA in vaccum or under a nitrogen flow. Under these conditions, PAHs(polycyclic aromatic hydrocarbons) were produced in the α-cages. The kinds of the species of PAHs formed are closely related to the rate of temperature increase and the terminated temperature. The PAHs formed in the cages of GaPO 4-LTA may act as a precursor for the formation of small fullerene molecules by further rearrangement in the inorganic host.