Beilstein J. Org. Chem.2020,16, 2282–2296, doi:10.3762/bjoc.16.189
all dyes were evaluated by thermogravimetric analysis (TGA). The TGA data showed that all dyes were thermally stable up to 250 °C.
Keywords: DFT calculations; NLO; pHsensitivedyes; Schiff base; solvent effect; styryl dyes; Introduction
Push-pull organic molecules are a class of organic dyes
media directly determines the pH level that affects organisms living in the corresponding area [18][19][20][21][22]. Therefore, pH-sensitivedyes play a critical role in various sensor applications for easy determination of such ions. These dyes show different spectral properties upon protonation
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Graphical Abstract
Scheme 1:
Synthetic pathways of dyes 3–7 and Schiff base analogs 8–12.