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In a previous study, three kinds of polymers are synthesized by the covalent bonding of three anthraquinone chromophores to polyphenylene sulfone. Herein, the nonlinear optical (NLO) properties of solutions and thin films of anthraquinone‐containing polyphenylsulfone, which can function as effective optical limiting materials are discussed in detail. The reasons for the improved NLO properties of...
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