A Dual-Wavelength Phosphorescent Anti-Counterfeiting Copolymer Containing Eu(III) and Tb(III)
The anti-counterfeiting technology of banknotes, bills and negotiable securities is constantly copied, and it is urgent to upgrade its anti-counterfeiting technology. In view of the defect of easy replication of single-wavelength anti-counterfeiting technology, the bonded copolymer PMEuTb was synthe...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/3/736 |
| _version_ | 1797623425493106688 |
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| author | Hui Zhao Zihao Wang Yongchao Wang Jiandong Guo Aiqin Zhang Husheng Jia Bingshe Xu |
| author_facet | Hui Zhao Zihao Wang Yongchao Wang Jiandong Guo Aiqin Zhang Husheng Jia Bingshe Xu |
| author_sort | Hui Zhao |
| collection | DOAJ |
| description | The anti-counterfeiting technology of banknotes, bills and negotiable securities is constantly copied, and it is urgent to upgrade its anti-counterfeiting technology. In view of the defect of easy replication of single-wavelength anti-counterfeiting technology, the bonded copolymer PMEuTb was synthesized, employing the technique of first coordination and then polymerization. The molecular structure of copolymer PMEuTb was confirmed by infrared spectrum and UV-vis absorption spectrum. The internal mechanism of negative correlation between initiator concentration and number-average molecular weight <i>M</i><sub>n</sub> of the copolymer was revealed, and the positive correlation between <i>M</i><sub>n</sub> and luminescent behavior of the copolymer was analyzed. The luminescent properties of copolymer PMEuTb with initiator amount of 0.1% were investigated, the copolymer PMEuTb exhibits dual-wavelength emission of green light and red light under the excitation of ultraviolet light at 254 nm and 365 nm. The copolymer has the lifetime of 1.083 ms at <sup>5</sup>D<sub>4</sub>–<sup>7</sup>F<sub>5</sub> transition and 0.665 ms at <sup>5</sup>D<sub>0</sub>–<sup>7</sup>F<sub>2</sub> transition, which belongs to phosphorescent emitting materials. The copolymer remains stable at 240 °C, and variable temperature photoluminescent spectra demonstrate the luminescent intensity remains 85% at 333 K, meeting the requirements of room temperature phosphorescent anti-counterfeiting materials. The luminescent patterns made by standard screen printing display the green and cuticolor logo at 254 nm and 365 nm, respectively, indicating that the bonded phosphors PMEuTb has potential application in phosphorescent anti-counterfeiting. |
| first_indexed | 2024-03-11T09:28:49Z |
| format | Article |
| id | doaj.art-c6bdcfa04907431db8eef3a255ae5bab |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T09:28:49Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-c6bdcfa04907431db8eef3a255ae5bab2023-11-16T17:49:50ZengMDPI AGPolymers2073-43602023-01-0115373610.3390/polym15030736A Dual-Wavelength Phosphorescent Anti-Counterfeiting Copolymer Containing Eu(III) and Tb(III)Hui Zhao0Zihao Wang1Yongchao Wang2Jiandong Guo3Aiqin Zhang4Husheng Jia5Bingshe Xu6Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, ChinaKey Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, ChinaCollege of Textile and Engineering, Taiyuan University of Technology, Taiyuan 030006, ChinaKey Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, ChinaCollege of Textile and Engineering, Taiyuan University of Technology, Taiyuan 030006, ChinaKey Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, ChinaKey Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, ChinaThe anti-counterfeiting technology of banknotes, bills and negotiable securities is constantly copied, and it is urgent to upgrade its anti-counterfeiting technology. In view of the defect of easy replication of single-wavelength anti-counterfeiting technology, the bonded copolymer PMEuTb was synthesized, employing the technique of first coordination and then polymerization. The molecular structure of copolymer PMEuTb was confirmed by infrared spectrum and UV-vis absorption spectrum. The internal mechanism of negative correlation between initiator concentration and number-average molecular weight <i>M</i><sub>n</sub> of the copolymer was revealed, and the positive correlation between <i>M</i><sub>n</sub> and luminescent behavior of the copolymer was analyzed. The luminescent properties of copolymer PMEuTb with initiator amount of 0.1% were investigated, the copolymer PMEuTb exhibits dual-wavelength emission of green light and red light under the excitation of ultraviolet light at 254 nm and 365 nm. The copolymer has the lifetime of 1.083 ms at <sup>5</sup>D<sub>4</sub>–<sup>7</sup>F<sub>5</sub> transition and 0.665 ms at <sup>5</sup>D<sub>0</sub>–<sup>7</sup>F<sub>2</sub> transition, which belongs to phosphorescent emitting materials. The copolymer remains stable at 240 °C, and variable temperature photoluminescent spectra demonstrate the luminescent intensity remains 85% at 333 K, meeting the requirements of room temperature phosphorescent anti-counterfeiting materials. The luminescent patterns made by standard screen printing display the green and cuticolor logo at 254 nm and 365 nm, respectively, indicating that the bonded phosphors PMEuTb has potential application in phosphorescent anti-counterfeiting.https://www.mdpi.com/2073-4360/15/3/736rare earthbonded copolymerluminescent propertiesdual-wavelengthphosphorescent anti-counterfeiting |
| spellingShingle | Hui Zhao Zihao Wang Yongchao Wang Jiandong Guo Aiqin Zhang Husheng Jia Bingshe Xu A Dual-Wavelength Phosphorescent Anti-Counterfeiting Copolymer Containing Eu(III) and Tb(III) Polymers rare earth bonded copolymer luminescent properties dual-wavelength phosphorescent anti-counterfeiting |
| title | A Dual-Wavelength Phosphorescent Anti-Counterfeiting Copolymer Containing Eu(III) and Tb(III) |
| title_full | A Dual-Wavelength Phosphorescent Anti-Counterfeiting Copolymer Containing Eu(III) and Tb(III) |
| title_fullStr | A Dual-Wavelength Phosphorescent Anti-Counterfeiting Copolymer Containing Eu(III) and Tb(III) |
| title_full_unstemmed | A Dual-Wavelength Phosphorescent Anti-Counterfeiting Copolymer Containing Eu(III) and Tb(III) |
| title_short | A Dual-Wavelength Phosphorescent Anti-Counterfeiting Copolymer Containing Eu(III) and Tb(III) |
| title_sort | dual wavelength phosphorescent anti counterfeiting copolymer containing eu iii and tb iii |
| topic | rare earth bonded copolymer luminescent properties dual-wavelength phosphorescent anti-counterfeiting |
| url | https://www.mdpi.com/2073-4360/15/3/736 |
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