Switching of Förster to Dexter Mechanism of Short-Range Energy Transfer in meso-Anthrylporphyrin
| Autor: | Kalyanasundaram Abinaya, Kaliyaperumal Sudha, Samuvelnesamani Karthikaikumar, Palanisamy Kalimuthu, Subramani Sundharamurthi |
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| Rok vydání: | 2017 |
| Předmět: |
Anthracene
010405 organic chemistry Quantum yield Protonation 010402 general chemistry Photochemistry 01 natural sciences Porphyrin Fluorescence spectroscopy 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound General Energy Förster resonance energy transfer chemistry Excited state Physical and Theoretical Chemistry Spectroscopy |
| Zdroj: | The Journal of Physical Chemistry C. 121:5941-5948 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.6b13042 |
| Popis: | Bichromophoric anthracene-porphyrin molecule namely 5-(4-nitrophenyl)-10,20-bisphenyl-15-(9-anthryl)porphyrin (AnNPP) was synthesized as a model to determine the short-range energy transfer between anthracene and porphyrin moieties. Switching of Forster to Dexter mechanism was studied in the free base (AnNPP) and protonated form of AnNPP (PAnNPP). The complete protonation of AnNPP was carried out by using hydrogen chloride (HCl) and was confirmed by UV–vis spectroscopy. The steady-state fluorescence spectroscopy shows that anthracene quantum yield is decreased in both AnNPP and PAnNPP. This was further proved by measuring fluorescence-lifetime using time correlated single photon counting (TCSPC) technique. A remarkable decrease in fluorescence-lifetime of anthracene is observed for both AnNPP and PAnNPP. Quantum chemical calculations were performed for AnNPP and PAnNPP to support the short distance energy transfer with switching of excited state energy transfer (EET) mechanism. The comparison of the EET r... |
| Databáze: | OpenAIRE |
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