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Preparation of Near-Infrared Absorbing Filter via in situ Polymerization Initiated by ~(60)Co-γ Ray

ZHAO Peng-fei;FANG Bin;CHEN Li-yuan;WANG Cheng-yun;SHEN Yong-jia;School of Chemistry and Molecular Engineering,East China University of Science and Technology;Institute of Nuclear Technology,East China University of Science and Technology;  
Two soluble metal phthalocyanine compounds A and B were designed and synthesized.Dye A is one of the phthalocyanine derivatives with its maximum absorption wavelength at 710 nm in N,N-dimethylformamide(DMF).Dye B is one of the vanadium oxide naphthalocyanine derivatives,whose maximum absorption wavelength is at 800 nm in DMF.These two dyes were added into acrylate monomers respectively,after which in situ crosslinking polymerization was conducted under radiation of ~(60)Co-γray and two kinds of the optical filters with near-infrared absorption were obtained.The absorption spectra of polyacrylate filters revealed that dye A and dye B both evenly dispersed in polyacrylate filters and the filters were nearly insoluble in normal organic solvents such as DMF,acetone and toluene.The absorption range were 620-780 nm for dye A and 700-870 nm for dye B in the filters,respectively.So the polyacrylate filters would behave well in shielding near-infrared light with wavelengths from 620 nm to870nm.In addition,the polyacrylate filters show excellent solvent-resistance.
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