Preparation and photophysical properties of a tetraethylene glycol-linked phthalocyanine–porphyrin dyad and triad
| العنوان: | Preparation and photophysical properties of a tetraethylene glycol-linked phthalocyanine–porphyrin dyad and triad |
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| المؤلفون: | Beate Röder, Dennis K. P. Ng, Xuebing Leng, Eugeny A. Ermilov |
| المصدر: | New Journal of Chemistry. 37:1746 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | Quantum yield, Triad (anatomy), General Chemistry, Photochemistry, Porphyrin, Catalysis, chemistry.chemical_compound, Electron transfer, medicine.anatomical_structure, chemistry, Excited state, Materials Chemistry, medicine, Phthalocyanine, Moiety, Singlet state |
| الوصف: | Treatment of 1,4-bis(tetraethylene glycol)-substituted zinc(II) phthalocyanine with p-toluenesulfonyl chloride and triethylamine followed by 5-(4-hydroxyphenyl)-10,15,20-triphenylporphyrin and K2CO3 resulted in the formation of both a covalently linked phthalocyanine–porphyrin dyad and triad. The photophysical properties of these hetero-arrays were studied in detail using steady-state and time-resolved spectroscopic methods. Upon excitation at the porphyrin moiety, both compounds exhibited predominantly highly efficient excitation energy transfer from the excited porphyrin to the phthalocyanine core. The rate of energy transfer (2.4 × 1010 s−1) was more than 20-fold faster than the rate of electron transfer (1.1 × 109 s−1). When the phthalocyanine core of the dyad and triad was excited either directly or via excitation energy transfer, its singlet excited state underwent charge transfer leading to reduction in the fluorescence quantum yield and fluorescence lifetime. The rate of charge transfer for the triad (2.8 × 108 s−1) was about two-fold higher than that for the dyad (1.5 × 108 s−1) due to the presence of an additional porphyrin moiety in the triad. |
| تدمد: | 1369-9261 1144-0546 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::9d80b0c2579102f47a59613ad0917abeTest https://doi.org/10.1039/c3nj00036bTest |
| رقم الانضمام: | edsair.doi...........9d80b0c2579102f47a59613ad0917abe |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13699261 11440546 |
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