3, 3,5 and 2,6 Expanded Aza-BODIPYs Via Palladium-Catalyzed Suzuki-Miyaura Cross-Coupling Reactions: Synthesis and Photophysical Properties
| Autor: | Gökhan Sevinç, Mustafa Hayvali, Halil Yılmaz |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Sociology and Political Science
010405 organic chemistry Singlet oxygen Clinical Biochemistry chemistry.chemical_element Chromophore 010402 general chemistry Photochemistry 01 natural sciences Biochemistry Fluorescence Fluorescence spectroscopy Coupling reaction 0104 chemical sciences Clinical Psychology chemistry.chemical_compound chemistry Bathochromic shift Absorption (electromagnetic radiation) Law Spectroscopy Social Sciences (miscellaneous) Palladium |
| Zdroj: | Journal of fluorescence. 31(1) |
| ISSN: | 1573-4994 |
| Popis: | Novel symmetrical aza-borondipyrromethene (aza-BODIPY) compounds bearing 4-methoxyphenyl, 4-methoxybiphenyl, 2,4-dimethoxybipheny, 4-bromophenyl and N,N-diphenyl-4-biphenylamine groups on the 3, 3,5 and 2,6 positions of aza-BODIPY core were synthesized via Suzuki-Miyaura coupling reactions while unsymmetrical analogues were obtained from the starting mono Br-substituted aza-BODIPY material which was obtained from nitrosolated pyrrole derivative. The characterizations were performed by means of 1H-NMR, 13C-NMR, FTIR and HRMS-TOF-ESI techniques. The spectral properties of the aza-BODIPY derivatives were investigated using absorption and fluorescence spectroscopy. The novel compounds with extended conjugation have broadband absorption in near infrared region and show significant shifts on their absorption and fluorescence spectra compared to unsubstituted analogues. The highest bathochromic shifts were observed π-extended and strong electron donating groups at 3,5 positions of the aza-BODIPY scaffold. Depend on substitution positions of attached groups to the indacene core, the fluorescence quantum yields of chromophores were determined to be drastic changes. The singlet oxygen generation capability of the compounds were evaluated and 2,6-bromine substituted compounds AA1 and CC1 showed high singlet oxygen quantum yields (71% and 74%, respectively). Enhanced photophysical properties such as intense absorption, extended conjugation and singlet oxygen production make the investigated aza-BODIPYs promising candidates for photodynamic therapy applications and organic photovoltaic cells in NIR region. |
| Databáze: | OpenAIRE |
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