Synthesis and spectral-luminescence properties of the conjugate of 24-epibrassinolide with porphyrin

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 conjug...

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Bibliographic Details
Published inJournal of applied spectroscopy Vol. 76; no. 4; pp. 542 - 546
Main Authors Raichyonok, T. F., Khripach, V. A., Zhabinskii, V. N., Konstantinova, O. V., Drašar, P. B., Monti, D.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.07.2009
Subjects
Analytical Chemistry
Atomic/Molecular Structure and Spectra
Physics
Physics and Astronomy
conjugate
fluorescence spectrum
absorption spectrum
porphyrin
24-epibrassinolide
diprotonated form
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Summary: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.
ISSN:0021-9037
1573-8647
DOI:10.1007/s10812-009-9225-8