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• W2805452014 abstract "Abstract This work presents two molecular fluorescent probes 1 and 2 for the selective determination of physiologically relevant K + levels in water based on a highly K + /Na + selective building block, the o ‐(2‐methoxyethoxy)phenylaza‐18‐crown‐6 lariat ether unit. Fluorescent probe 1 showed a high K + ‐induced fluorescence enhancement (FE) by a factor of 7.7 of the anthracenic emission and a dissociation constant ( K d ) value of 38 m m in water. Further, for 2 +K + , we observed a dual emission behavior at 405 and 505 nm. K + increases the fluorescence intensity of 2 at 405 nm by a factor of approximately 4.6 and K + decreases the fluorescence intensity at 505 nm by a factor of about 4.8. Fluorescent probe 2 +K + exhibited a K d value of approximately 8 m m in Na + ‐free solutions and in combined K + /Na + solution a similar K d value of about 9 m m was found, reflecting the high K + /Na + selectivity of 2 in water. Therefore, 2 is a promising fluorescent tool to measure ratiometrically and selectively physiologically relevant K + levels." @default.
• W2805452014 created "2018-06-13" @default.
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• W2805452014 date "2018-07-03" @default.
• W2805452014 modified "2023-09-27" @default.
• W2805452014 title "A Ratiometric Fluorescent Probe for K ⁺ in Water Based on a Phenylaza‐18‐Crown‐6 Lariat Ether" @default.
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• W2805452014 doi "https://doi.org/10.1002/chem.201802306" @default.
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