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- W2036587941 abstract "The synthesis of eight novel squarylium cyanine dyes is described. The dyes exhibit high solubility in organic solvents due to the introduction of the 1-sulfonatopropyl group onto the N-atom of the indolenine moiety. The condensation of the indolenine with squaric acid preceded smoothly, the reaction being catalyzed by a weak base. Spectral parameters of the dyes were correlated with the nature of the 5-substituent in the indolenium moeity. All the substituents studied in this work gave a bathochromic effect on absorption and emission, as well as enhancing the fluorescence quantum yield. The effects increased with the electron-donating ability of the substituent, due to involvement of the donor moiety in S0→S1 excition and stabilization of the excited state." @default.
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- W2036587941 title "Synthesis and spectral characteristics of some highly soluble squarylium cyanine dyes" @default.
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- W2036587941 doi "https://doi.org/10.1016/s0143-7208(96)00121-0" @default.
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