New ON–OFF type Ca2+-selective fluoroionophore having boron–dipyrromethene fluorophores
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| Title: | New ON–OFF type Ca2+-selective fluoroionophore having boron–dipyrromethene fluorophores |
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| Authors: | Cha, Na Ri1, Moon, So Youn1, Chang, Suk-Kyu skchang@cau.ac.kr |
| Source: | Tetrahedron Letters: International Organ for the Rapid Publication of Preliminary Communications in Organic Chemistry. Nov2003, Vol. 44 Issue 45, p8265. 4p. |
| Subjects: | Ionophores, Boron compounds, Enantiomers, Stereoisomers |
| Abstract: | A new fluorogenic ionophore has been prepared by conjugating calix[4]-crown-5 ether with boron–dipyrromethene fluorophore. The ionophore exhibited a pronounced selective ON–OFF type response toward Ca2+ ions over other physiologically important metal ions of Na+, K+, and Mg2+. The interaction with Ca2+ ions resulted in very efficient quenching of fluorescence at 507 nm excited by relatively long wavelength irradiation at 480 nm. The selectivity ratios toward Ca2+ ions over other tested physiologically important metal ions were larger than 180 in aqueous 95% MeOH solution. [Copyright &y& Elsevier] |
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| Database: | Engineering Source |
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