Synthesis and spectral-luminescence properties of the conjugate of 24-epibrassinolide with porphyrin |
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| Authors: | T?F?Raichyonok V?A?Khripach V?N?Zhabinskii O?V?Konstantinova P?B?Dra?ar D?Monti |
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| Institution: | 1.B. I. Stepanov Institute of Physics,National Academy of Sciences of Belarus,Minsk,Belarus;2.Institute of Bioorganic Chemistry,National Academy of Sciences of Belarus,Minsk,Belarus;3.Institute of Chemical Technology,Prague,Czech Republic;4.University of Rome Tor Vergata,Rome,Italy |
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| Abstract: | The synthesis of a previously unknown conjugate of 24-epibrassinolide with porphyrin is described. Four molecules of 24-epibrassinolide
are bonded to a molecule of porphyrin by selective formation of cyclical boric ethers in diol groups of the side chain. Electronic
spectra of the synthesized conjugate of 24-epibrassinolide with porphyrin are measured and analyzed. The spectral and luminescence
characteristics of the initial porphyrin and the conjugate are found to be similar. The quantum yield and fluorescence lifetime
of the conjugate in tetrahydrofuran are 0.06 and 10.6 ns, respectively. The extinction coefficient of the conjugate in tetrahydrofuran
is 385,000 (M∙cm)–1 at a wavelength of 418 nm. |
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