首页|Room temperature phosphorescence of heavy-atom-free indole carboxylic acid/polyacrylamide:Low cost,long lifetime and good luminescent efficiency
Room temperature phosphorescence of heavy-atom-free indole carboxylic acid/polyacrylamide:Low cost,long lifetime and good luminescent efficiency
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Functional organics doped polymers have displayed tunable room temperature phosphorescence(RTP),emerging as promising applications in optical information encryption and organic electronic devices.However,the present doped polymer systems confront a difficulty of constructing a low-cost heavy-atom-free doped systems with ultra-long RTP lifetime and high luminescent efficiency by a facile and environmental-friendly approach,which retards large-scale and commercialized applications.In this work,based on indole derivatives of high quantum efficiency and water-soluble polyacrylamide(PAM)of high H-bond capacity,several kinds of commercialized indole carboxylic acid(ICA),with different extended benzoic acid arms,were respectively combined with PAM based on intermolecular hydrogen bonding by water-promoted dispersion,thereby effectively retarding non-radiative transition.The average RTP lifetimes of 5-ICA/PAM-0.3% and IDCA/PAM-0.3% films could reach 1.997 and 0.992 s respectively at room temperature.Moreover,to adjust the.positions of substituted carboxy groups,the luminescent colors can be tuned from blue to yellowish green.Anti-counterfeiting patterns can be facilely fabricated with ICA-doped PAM by environmental-friendly and low-cost screen printing and brush writing,which gives an insight into commercialized production for information security.
Indole carboxylic acidPolyacrylamideRoom temperature phosphorescenceAnti-counterfeiting
Guanbin Wen、Kaiyan Li、Wei Zhou
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Kunming University of Science and Technology,Kunming,650500,China
Kunming University of Science and Technology,Kunming,650500,China b Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education,Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films,School of Chemistry,Sun Yat-sen University,Guangzhou,510275,PR China
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