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Tetramethoxy‐Aminorhodamine (TMARh): A Bichromophore, an Improved Fluorophore, and a pH Switch
Author(s) -
Sørensen Thomas Just,
Shi Dong,
Laursen Bo W.
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201600496
Subject(s) - fluorophore , fluorescence , rhodamine , protonation , chemistry , photochemistry , rhodamine b , organic chemistry , optics , physics , ion , photocatalysis , catalysis
Rhodamine is one of the most widely used fluorescent dyes. Here, a new synthetic pathway to the popular dyes is reported and the effect of adding four methoxy groups to the molecular structure is investigated. Tetramethoxy‐aminorhodamine ( TMARh ) is found to show superior pH switching compared to the rhodamine without the four methoxy groups, owing to changed properties of the dark “off” state and increased fluorescence intensity in the protonated “on” state.