Two‐channel near‐infrared fluorescence Ag + ion sensing of a new star‐shaped dendrimer
| Autor: | Huan-ren Cheng, Di Rao, Song Zhang, Ling Yang, Xiao-ju Lu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
010401 analytical chemistry Biophysics Analytical chemistry 02 engineering and technology Carbon-13 NMR 021001 nanoscience & nanotechnology Mass spectrometry 01 natural sciences Fluorescence 0104 chemical sciences Ion Electron transfer Förster resonance energy transfer Chemistry (miscellaneous) Ionization Dendrimer 0210 nano-technology |
| Zdroj: | Luminescence. 34:615-622 |
| ISSN: | 1522-7243 1522-7235 |
| DOI: | 10.1002/bio.3647 |
| Popis: | A new near-infrared fluorescence sensor PDI-PD for Ag+ ions was successfully prepared and its structure characterized by 1 H nuclear magnetic resonance (NMR), 13 C NMR and high-resolution mass spectrometry; matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (HRMS MALDI-TOF). The probe exhibited rapid, sensitive, and selective two-channel fluorescence responses towards Ag+ ions and protons. The probe has a marked high binding affinity and high sensitivity for Ag+ , with a detection limit of 1.4 × 10-6 M. An approximately five-fold enhanced core emission at 784 nm was attributed to fluorescence resonance energy transfer (FRET). The enhanced core emission of the probe with Ag+ ions based on photo-induced electron transfer and FRET is discussed. In addition, the probe presented a visible colour change. All experimental results demonstrated that PDI-PD is an efficient tool for the selective, sensitive and rapid detection of Ag+ ions and protons using two-channel fluorescence responses. |
| Databáze: | OpenAIRE |
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