Turn-on fluorescence chemical sensing through transformation of self-trapped exciton states at room temperature
Most of the current fluorescence sensing materials belong to the turn-off type, which make it hard to detect toxic substances such as benzene, toluene, and xylene (BTX) due to the lack of active chemical sites, thereby limiting their development and practical use. Herein, we show a guest-host mechan...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
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American Chemical Society
2022
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| _version_ | 1826308714205806592 |
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| author | Zhang, Y Mollick, S Tricarico, M Ye, J Sherman, DA Tan, J-C |
| author_facet | Zhang, Y Mollick, S Tricarico, M Ye, J Sherman, DA Tan, J-C |
| author_sort | Zhang, Y |
| collection | OXFORD |
| description | Most of the current fluorescence sensing materials belong to the turn-off type, which make it hard to detect toxic substances such as benzene, toluene, and xylene (BTX) due to the lack of active chemical sites, thereby limiting their development and practical use. Herein, we show a guest-host mechanism stemming from the confined emitter's self-trapped exciton (STE) states or electron-phonon coupling to achieve turn-on fluorescence. We designed a luminescent guest@metal-organic framework (LG@MOF) composite material, termed perylene@MIL-68(In), and established its E-type excimeric emission properties in the solid state. Upon exposure to BTX, especially xylene, we show that the E-excimer readily converts into the Y-excimer due to nanoconfinement of the MOF structure. Such a transformation elevates the fluorescence intensity, thus realizing a turn-on type fluorescent sensor for detecting BTX solvents. Our results further demonstrate that controlling the STE states of perylene at room temperature (vs the previous report of <50 K) is possible <i>via</i> nanoscale confinement, paving the way to enabling turn-on type luminescent sensors for engineering practical applications. |
| first_indexed | 2024-03-07T07:23:27Z |
| format | Journal article |
| id | oxford-uuid:d53c63df-6130-4b3d-ba29-390f48b47ef6 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:23:27Z |
| publishDate | 2022 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:d53c63df-6130-4b3d-ba29-390f48b47ef62022-10-25T10:26:29ZTurn-on fluorescence chemical sensing through transformation of self-trapped exciton states at room temperatureJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d53c63df-6130-4b3d-ba29-390f48b47ef6EnglishSymplectic ElementsAmerican Chemical Society2022Zhang, YMollick, STricarico, MYe, JSherman, DATan, J-CMost of the current fluorescence sensing materials belong to the turn-off type, which make it hard to detect toxic substances such as benzene, toluene, and xylene (BTX) due to the lack of active chemical sites, thereby limiting their development and practical use. Herein, we show a guest-host mechanism stemming from the confined emitter's self-trapped exciton (STE) states or electron-phonon coupling to achieve turn-on fluorescence. We designed a luminescent guest@metal-organic framework (LG@MOF) composite material, termed perylene@MIL-68(In), and established its E-type excimeric emission properties in the solid state. Upon exposure to BTX, especially xylene, we show that the E-excimer readily converts into the Y-excimer due to nanoconfinement of the MOF structure. Such a transformation elevates the fluorescence intensity, thus realizing a turn-on type fluorescent sensor for detecting BTX solvents. Our results further demonstrate that controlling the STE states of perylene at room temperature (vs the previous report of <50 K) is possible <i>via</i> nanoscale confinement, paving the way to enabling turn-on type luminescent sensors for engineering practical applications. |
| spellingShingle | Zhang, Y Mollick, S Tricarico, M Ye, J Sherman, DA Tan, J-C Turn-on fluorescence chemical sensing through transformation of self-trapped exciton states at room temperature |
| title | Turn-on fluorescence chemical sensing through transformation of self-trapped exciton states at room temperature |
| title_full | Turn-on fluorescence chemical sensing through transformation of self-trapped exciton states at room temperature |
| title_fullStr | Turn-on fluorescence chemical sensing through transformation of self-trapped exciton states at room temperature |
| title_full_unstemmed | Turn-on fluorescence chemical sensing through transformation of self-trapped exciton states at room temperature |
| title_short | Turn-on fluorescence chemical sensing through transformation of self-trapped exciton states at room temperature |
| title_sort | turn on fluorescence chemical sensing through transformation of self trapped exciton states at room temperature |
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