萘酞菁镍化合物的合成、 非线性及光限幅特性

以1,8-二氮杂双环［5.4.0］十一碳烯-7（DBU）为催化剂采用液相法合成了四叔丁基-2,3-萘酞菁镍(TBNPcNi). 应用调Q倍频(ns/ps)Nd ∶[KG-*3]YAG脉冲激光系统, 在532 nm波长下, 研究了化合物的非线性和光限幅特性. 在高斯单位制(esu)下测得化合物的非线性折射率n₂和三阶非线性极化率χ⁽³⁾分别为2.07×10^-11和7.57×10^-12, 分子极化率γ′为2.96×10^-29, 显著高于金属酞菁分子. 化合物具有优异的非线性光限幅特性, 当线性透过率为72%时, 限幅阈值为1 722 mJ/cm², 箝位值为700 mJ/cm², 有效激发态与基态吸收截面比为4.48.

Synthesis,Nonlinear Optical Properties and Optical Limiting Effect of Naphthalocyaninanickel Complex

With 1,8-diazabicyclo［5.4.0］ undec 7 ene (DBU) ascatalyst, tetra tert butyl-2,3-naphthalocyaninanickel (TBNPcNi) was synthesized by means of liquid synthesis method. A frequency doubled Q switched Nd ∶[KG-*3]YAG laser system with ns/ps laser pulse was used for studying nonlinear and optical limiting properties of the synthesized compound at a wavelength of 532 nm. The
nonlinear refracting index, n₂ and third order nonlinear polarizability,χ⁽³⁾ were 2.07×10^-11 and 7.57×10^-12 , respectively, which are obviously higher than the values of metallic phthalocyanine. The compound shows excellent nonlinear optical limiting performance. When the visible light transmittance is 72%, the limiting threshold value is 1 722 mJ/cm2, theclamp value is 700 mJ/cm2, the ratio of absorption sectional areas of effective excited state and ground state is 4.48.