Charge Transfer Dye in Various Polymers with Different Polarity: Synthesis, Photophysical Properties, and Unusual Aggregation-Induced Fluorescence Changes
作者： Giseop Kwak , Hyeryun Kim , In-Kyu Kang , Sung-Hoon Kim
DOI: 10.1021/MA802532B
关键词:
摘要: A new pyran-based CTD monomer, allyl 2-(2,6-bis((E)-4-(dimethylamino)styryl)-4H-pyran-4-ylidene)-2-cyanoacetate (2), was successfully synthesized by Knoevenagel reaction. Copolymerization of 2 with styrene (St), methyl methacrylate (MMA), and acrylonitrile (AN) afforded copolymers different polarity, P(St-co-2), P(MMA-co-2), P(AN-co-2), respectively. IR UV−vis absorption spectra revealed that is incorporated into the copolymers. The in exhibited fluorescence properties which are completely from 2. All these showed significant blue shifts emission relative to Also, their λmax,abs λmax,em increased an increase dielectric constant (e) polymer matrix order PAN (e = 5.5) > PMMA (3.3) PSt (2.5). DMF along aggregation addition methanol while 1,4-dioxane a red shift. intensity P(St-co-2) P(MMA-co-2) decreased a...
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