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Synthesis and pH ‐sensing Properties of a Push–Pull Conjugated Fluorophore Based on Dicyanomethylene‐1,4‐dihydropyridine
Author(s) -
Kim Young Hyun,
Kim Heemoon,
Kim Hyung Jin
Publication year - 2016
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.10711
Subject(s) - conjugated system , fluorescence , fluorophore , moiety , chemistry , absorption (acoustics) , photochemistry , fluorescence spectroscopy , nuclear chemistry , materials science , stereochemistry , organic chemistry , polymer , physics , quantum mechanics , composite material
A push–pull conjugated dye with a dicyanomethylene‐1,4‐dihydropyridine moiety ( DCMP ) was designed and synthesized for use as an optical pH sensor in acidic solution. The spectroscopic and pH ‐sensing properties of DCMP were investigated by UV –vis and fluorescence spectroscopy. DCMP displayed a pH ‐dependent ratiometric absorption property in the range of pH 4.5–12.0. The fluorescence intensity of DCMP around 560 nm, when irradiated at 435 nm, increased when pH was increased in the range of 2.0–7.0, showing a linear response in the pH range of 3.85–6.25.