Red-emitting tetracoordinate organoboron chelates : synthesis, photophysical properties, and fluorescence microscopy
| Autor: | Daniel Collado, Vânia F. Pais, Pedro Ramírez-López, Uwe Pischel, Francisco Najera, José M. Lassaletta, Antonio Romero-Arenas, Rosario Fernández, Abel Ros, Ezequiel Perez-Inestrosa |
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| Přispěvatelé: | Universidad de Sevilla. Departamento de Química Orgánica, Ministerio de Economía y Competitividad (MINECO). España |
| Jazyk: | Spanish; Castilian |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Arias Montano. Repositorio Institucional de la Universidad de Huelva instname idUS. Depósito de Investigación de la Universidad de Sevilla Digital.CSIC. Repositorio Institucional del CSIC |
| Popis: | Seven tetra-coordinate organoboron fluorophores with hetero-biaryl N,O or N,N chelate ligands were prepared and photophysically characterized (in toluene). The electronic variation of the heteroaromatic moiety provided a means for the fine-tuning of the UV/vis-absorption and emission spectra. In the most interesting cases the spectra were re-shifted to maximum absorb-ance at wavelengths longer than 500 nm and emission maxima between 620 and 660 nm. The pronounced intramolecular charge-transfer character of the dyes yielded large Stokes shifts (3500–5100 cm–1), while maintaining appreciable fluorescence quantum yields of up to 0.2 for emission maxima longer than 600 nm. The lipophilic character of the dyes enabled their application as stains of vesicle substructures in confocal fluorescence microscopy imaging. The funding by the Spanish Ministry of Economy and Competitiveness (Grants CTQ2014-54729-C2-1-P for U.P., CTQ2013-48164-C2-1-P, CTQ2013-48164-C2-2-P for A.R., CTQ2013-41339-P and CTQ2015-71896-REDT for E.P.I., Ramon y Cajal contract RYC-2013-12585 for A.R.), the European Union (FEDER), and the Andalusian Government (Grants 2012/FQM-2140 for U.P., 2009/FQM-4537 and 2012/FQM-1078 for A.R., postdoctoral contract for V.F.P.) is acknowledged. Furthermore, we are thankful for the provided access to the Supercomputing and Bioinformatics Center (University of Malaga). |
| Databáze: | OpenAIRE |
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