Synthesis, photophysics of a novel green light emitting 1,3,4-oxadiazole and its application in FRET with ZnSe/ZnS QDs donor
| Autor: | M.S. Sannaikar, M.N. Wari, Narahari Deshapande, Imtiyaz Ahmed M. Khazi, Sanjeev R. Inamdar, G. H. Pujar |
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| Rok vydání: | 2017 |
| Předmět: |
Quenching (fluorescence)
Chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences Fluorescence Acceptor Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Förster resonance energy transfer Quantum dot Materials Chemistry Molecule Physical and Theoretical Chemistry Time-resolved spectroscopy 0210 nano-technology Spectroscopy |
| Zdroj: | Journal of Molecular Liquids. 248:350-359 |
| ISSN: | 0167-7322 |
| Popis: | The design and synthesis of a novel molecule 2-(4-((E)-2-(5-((E)-4-(5-(4-tert-butylphenyl)-1,3,4-oxadiazol-2-yl)styryl)thiophen-2-yl)vinyl)-5-(4-tert-butylphenyl)1,3,4-oxadiazole (2TVPO) based on Donor-π-Acceptor strategy through the Wittig reaction as well as characterization by 1H, 13C NMR spectroscopy, high resolution mass spectrometry and FT-IR spectroscopy form the central theme of the present work. Thermal (TGA and DSC), photophysical and electrochemical properties have been studied in detail for this novel probe. In addition, fluorescence resonance energy transfer (FRET) employing steady state and time resolved spectroscopy methods has been studied using core-shell ZnSe/ZnS QDs (7 and 8 nm) and 2TVPO fluorescent probe, respectively, as the energy donor and acceptor. Results of these studies reveal that (i) FRET pairs show a strong dipole-dipole interaction tendency to transfer energy from donor to acceptor; (ii) they possess high FRET efficiency and (iii) strong dependence of the acceptor emission on the overlap integral, quantum dot size and donor-acceptor distance. Further, the type of quenching is analyzed by Stern–Volmer plots. |
| Databáze: | OpenAIRE |
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