Precision Synthesis of Conjugated Polymer Films by Surface-Confined Stepwise Sonogashira Cross-Coupling
Thin films of poly(arylene ethynylene)-conjugated polymers, including low-energy-gap donor–acceptor polymers, can be prepared via stepwise polymerization utilizing surface-confined Sonogashira cross-coupling. This robust and efficient polymerization protocol yields conjugated polymers with a precise...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-11-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/29/22/5466 |
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| author | Sang Gil Youm Mitchell T. Howell Chien-Hung Chiang Lu Lu Neepa M. K. Kuruppu Arachchige John F. Ankner Joseph Strzalka Yaroslav Losovyj Jayne C. Garno Evgueni E. Nesterov |
| author_facet | Sang Gil Youm Mitchell T. Howell Chien-Hung Chiang Lu Lu Neepa M. K. Kuruppu Arachchige John F. Ankner Joseph Strzalka Yaroslav Losovyj Jayne C. Garno Evgueni E. Nesterov |
| author_sort | Sang Gil Youm |
| collection | DOAJ |
| description | Thin films of poly(arylene ethynylene)-conjugated polymers, including low-energy-gap donor–acceptor polymers, can be prepared via stepwise polymerization utilizing surface-confined Sonogashira cross-coupling. This robust and efficient polymerization protocol yields conjugated polymers with a precise molecular structure and with nanometer-level control of the organization and the uniform alignment of the macromolecular chains in the densely packed film. In addition to high stability and predictable and well-defined molecular organization and morphology, the surface-confined conjugated polymer chains experience significant interchain electronic interactions, resulting in dominating intermolecular π-electron delocalization which is primarily responsible for the electronic and spectroscopic properties of polymer films. The fluorescent films demonstrate remarkable performance in chemosensing applications, showing a turn-off fluorescent response on the sub-ppt (part per trillion) level of nitroaromatic explosives in water. This unique sensitivity is likely related to the enhanced exciton mobility in the uniformly aligned and structurally monodisperse polymer films. |
| format | Article |
| id | doaj-art-066be2fee9014deaa9dd7cf2da68fe8b |
| institution | OA Journals |
| issn | 1420-3049 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj-art-066be2fee9014deaa9dd7cf2da68fe8b2025-08-20T02:04:59ZengMDPI AGMolecules1420-30492024-11-012922546610.3390/molecules29225466Precision Synthesis of Conjugated Polymer Films by Surface-Confined Stepwise Sonogashira Cross-CouplingSang Gil Youm0Mitchell T. Howell1Chien-Hung Chiang2Lu Lu3Neepa M. K. Kuruppu Arachchige4John F. Ankner5Joseph Strzalka6Yaroslav Losovyj7Jayne C. Garno8Evgueni E. Nesterov9Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL 60115, USADepartment of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL 60115, USADepartment of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USADepartment of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USADepartment of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USASpallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USAX-Ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USADepartment of Chemistry, Indiana University, Bloomington, IN 47401, USADepartment of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USADepartment of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL 60115, USAThin films of poly(arylene ethynylene)-conjugated polymers, including low-energy-gap donor–acceptor polymers, can be prepared via stepwise polymerization utilizing surface-confined Sonogashira cross-coupling. This robust and efficient polymerization protocol yields conjugated polymers with a precise molecular structure and with nanometer-level control of the organization and the uniform alignment of the macromolecular chains in the densely packed film. In addition to high stability and predictable and well-defined molecular organization and morphology, the surface-confined conjugated polymer chains experience significant interchain electronic interactions, resulting in dominating intermolecular π-electron delocalization which is primarily responsible for the electronic and spectroscopic properties of polymer films. The fluorescent films demonstrate remarkable performance in chemosensing applications, showing a turn-off fluorescent response on the sub-ppt (part per trillion) level of nitroaromatic explosives in water. This unique sensitivity is likely related to the enhanced exciton mobility in the uniformly aligned and structurally monodisperse polymer films.https://www.mdpi.com/1420-3049/29/22/5466Sonogashira cross-couplingstepwise polymerizationpolymer thin filmsfluorescent sensorexcitation energy transferdetection of nitroaromatic compounds |
| spellingShingle | Sang Gil Youm Mitchell T. Howell Chien-Hung Chiang Lu Lu Neepa M. K. Kuruppu Arachchige John F. Ankner Joseph Strzalka Yaroslav Losovyj Jayne C. Garno Evgueni E. Nesterov Precision Synthesis of Conjugated Polymer Films by Surface-Confined Stepwise Sonogashira Cross-Coupling Molecules Sonogashira cross-coupling stepwise polymerization polymer thin films fluorescent sensor excitation energy transfer detection of nitroaromatic compounds |
| title | Precision Synthesis of Conjugated Polymer Films by Surface-Confined Stepwise Sonogashira Cross-Coupling |
| title_full | Precision Synthesis of Conjugated Polymer Films by Surface-Confined Stepwise Sonogashira Cross-Coupling |
| title_fullStr | Precision Synthesis of Conjugated Polymer Films by Surface-Confined Stepwise Sonogashira Cross-Coupling |
| title_full_unstemmed | Precision Synthesis of Conjugated Polymer Films by Surface-Confined Stepwise Sonogashira Cross-Coupling |
| title_short | Precision Synthesis of Conjugated Polymer Films by Surface-Confined Stepwise Sonogashira Cross-Coupling |
| title_sort | precision synthesis of conjugated polymer films by surface confined stepwise sonogashira cross coupling |
| topic | Sonogashira cross-coupling stepwise polymerization polymer thin films fluorescent sensor excitation energy transfer detection of nitroaromatic compounds |
| url | https://www.mdpi.com/1420-3049/29/22/5466 |
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