Preparation And Properties Of Functional Poly(arylene Ether)s-based Optical Limiting Materials

Laser technique has been widely applied in the field of military affairs,medicine,electrocommunication,and industrial processing since it was discoved first time in1960 s,which meanwhile also promoted the awareness and basic theory of nonlinear optics(NLO).Following the rapid development of laser technique and weapons,laser sources of various repetition,pulse width,wavelength,and energy have been used for the disturbance,distruction,and blinding aimed at photoelectronic devices and human eyes,posing great threat to our daily lives and national security.Optical limiters are based on nonlinear optical principle for protecting human eyes and optical sensors,allowing the susceptibility and optical parameters to vary with the increasing input intensity,which technically result in the decrease of output intensity and transmittance,thus limit the power or energy under the damage level.However,optical limiting materials are still far from practical application,particularly in aspects of linear trasmittance,limiting threshold,response speed,and devices fabrication.This dissertation focuses on some issues concerned and the current direction of optical limiting materials,demonstrates the preparation of poly(arylene ether)s based functional materials as well as hybrids involving metal porphryins,carbon nanotubes,graphene,and precious metal acetylide with strong NLO effects from the perspective of molecular design.In virtue of the synergistic combination of reverse saturable absorption,nonlinear scattering,and photo-induced electron or energy transfer process,the NLO response and optical limiting properties of the hybrids at both 532 nm and 1064 nm under ns laser pulse were dramatically enhanced.Meanwhile,solid-state optical limiting materials were prepared from porphyrin or Pt-acetylidecontaining poly(arylene ether)s by different methods,exhibiting superior optical limiting performance than solution samples.