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合成了1种新的DπA结构的吡啶盐,通过红外、元素分析、热重分析、单晶X射线衍射对化合物的结构进行了表征。研究了它的荧光光谱,用1064nm皮秒脉冲激光研究了它的三阶非线性光学特性。结果表明,该吡啶盐的双光子吸收系数β=0.1047cm/GW,双光子吸收截面σ=3.2473×10-46cm4·s·photon-1,当泵浦能量达到1.677mJ时,上转换效率达到1.9%。
A new pyridinium salt with DπA structure was synthesized. The structure of the compound was characterized by IR, elemental analysis, thermogravimetry and single crystal X-ray diffraction. Its fluorescence spectra were studied, and its third-order nonlinear optical properties were studied with 1064 nm picosecond pulsed laser. The results showed that the pyridinium salt has a two-photon absorption coefficient β = 0.1047cm / GW and a two-photon absorption cross section σ = 3.2473 × 10-46cm4 · s · photon-1. When the pump energy reaches 1.677mJ, the upconversion efficiency reaches 1.9 %.