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@article{1671637,
author = {Madea, Dominik and Martínek, Marek and Muchova, Lucie and Vana, Jiri and Vitek, Libor and Klán, Petr},
article_location = {Washington, D.C.},
article_number = {5},
doi = {http://dx.doi.org/10.1021/acs.joc.9b03217},
keywords = {TURN-ON PROBE; LIVING CELLS; SENSITIVE DETECTION; SELECTIVE DETECTION; FLUOROGENIC PROBE; NITRIC-OXIDE; DUAL PROBE; CO; COMPLEXES; DYES},
language = {eng},
issn = {0022-3263},
journal = {Journal of Organic Chemistry},
title = {Structural Modifications of Nile Red Carbon Monoxide Fluorescent Probe: Sensing Mechanism and Applications},
url = {https://pubs.acs.org/doi/10.1021/acs.joc.9b03217},
volume = {85},
year = {2020}
}
TY - JOUR
ID - 1671637
AU - Madea, Dominik - Martínek, Marek - Muchova, Lucie - Vana, Jiri - Vitek, Libor - Klán, Petr
PY - 2020
TI - Structural Modifications of Nile Red Carbon Monoxide Fluorescent Probe: Sensing Mechanism and Applications
JF - Journal of Organic Chemistry
VL - 85
IS - 5
SP - 3473-3489
EP - 3473-3489
PB - American Chemical Society
SN - 00223263
KW - TURN-ON PROBE
KW - LIVING CELLS
KW - SENSITIVE DETECTION
KW - SELECTIVE DETECTION
KW - FLUOROGENIC PROBE
KW - NITRIC-OXIDE
KW - DUAL PROBE
KW - CO
KW - COMPLEXES
KW - DYES
UR - https://pubs.acs.org/doi/10.1021/acs.joc.9b03217
L2 - https://pubs.acs.org/doi/10.1021/acs.joc.9b03217
N2 - Carbon monoxide (CO) is a cell-signaling molecule (gasotransmitter) produced endogenously by oxidative catabolism of heme, and the understanding of its spatial and temporal sensing at the cellular level is still an open challenge. Synthesis, optical properties, and study of the sensing mechanism of Nile red Pd-based CO chemosensors, structurally modified by core and bridge substituents, in methanol and aqueous solutions are reported in this work. The sensing fluorescence "off-on" response of palladacycle-based sensors possessing low-background fluorescence arises from their reaction with CO to release the corresponding highly fluorescent Nile red derivatives in the final step. Our mechanistic study showed that electron-withdrawing and electron-donating core substituents affect the rate-determining step of the reaction. More importantly, the substituents were found to have a substantial effect on the Nile red sensor fluorescence quantum yields, hereby defining the sensing detection limit. The highest overall fluorescence and sensing rate enhancements were found for a 2-hydroxy palladacycle derivative, which was used in subsequent biological studies on mouse hepatoma cells as it easily crosses the cell membrane and qualitatively traces the localization of CO within the intracellular compartment with the linear quantitative response to increasing CO concentrations.
ER -
MADEA, Dominik, Marek MARTÍNEK, Lucie MUCHOVA, Jiri VANA, Libor VITEK and Petr KLÁN. Structural Modifications of Nile Red Carbon Monoxide Fluorescent Probe: Sensing Mechanism and Applications. \textit{Journal of Organic Chemistry}. Washington, D.C.: American Chemical Society, 2020, vol.~85, No~5, p.~3473-3489. ISSN~0022-3263. Available from: https://dx.doi.org/10.1021/acs.joc.9b03217.
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