Electro-Photodynamic Visualization of Singlet Oxygen Induced by Zinc Porphyrin Modified Microchip in Aqueous Media
| Autor: | Song Hongxin, Chenyu Zheng, Ji Xubo, Ying Wan, Cui Hongda, Kefeng Ma, Yao Chuanguang, Peng Xin, Deng Shengyuan |
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| Rok vydání: | 2016 |
| Předmět: |
Electrolysis
Aqueous solution Chemistry Singlet oxygen Inorganic chemistry chemistry.chemical_element 02 engineering and technology Zinc 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Oxygen Porphyrin 0104 chemical sciences law.invention chemistry.chemical_compound law General Materials Science Tetraoctylammonium bromide 0210 nano-technology Electron paramagnetic resonance |
| Zdroj: | ACS applied materialsinterfaces. 8(50) |
| ISSN: | 1944-8252 |
| Popis: | A porphyrin-based electro-photodynamic imaging system was fabricated for monitoring the concentration of oxygen. Distinct from the electrochemiluminescent (ECL) inability of numerous organic species in aqueous solutions, a strong and stable red irradiation at 634 nm could be stimulated electrochemically on zinc(II) meso-tetra(4-carboxyphenyl) porphine (ZnTCPP)/tetraoctylammonium bromide (TOAB) in the physiological condition. In terms of in situ electron paramagnetic resonance and ECL spectroscopies, the nature of ECL was thoroughly investigated, being exactly the chemiluminescence from singlet oxygen (1O2) produced during the successive electro-reduction of ZnTCPP. Meanwhile, the excellent film-making capacity of amphiphilic TOAB as a potent ion barrier granted the luminophores a micro-order and patternable electrode modification. Such platform was exceptionally tolerant of pH variation, facilitating a durable solid-state ECL visualization under potentiostatic electrolysis and time exposure in the charge-... |
| Databáze: | OpenAIRE |
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