Synthesis, Structure and Solvatochromic Properties of Novel Diacetylene rhodamine-based Solvatochromic Dye

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Prangtip Chansri
Banchob Wanno
Chatthai Kaewtong


A novel diacetylene rhodamine-based solvatochromic dye (DA-Rhoen) have been synthesized by amidation reaction between Rhoen and DA. Chemical structures and purity were characterizations by 1H NMR and ATR-FTIR. The photophysical studies in different solvents, such as H2O, methanol (MeOH), ethanol (EtOH), dimethylformamide (DMF), acetonitrile (ACN), dimethyl sulfoxide (DMSO), tetrahydrofuran (THF), dichloromethane (CH2Cl2) and chloroform (CHCl3) were studied. It was found that the largest color and fluorescence changed were visualized after dissolved in CHCl3 solution. In addition, UV-visible and fluorescence spectra also showed a new significant enhancement of absorbance intensity (at 550 nm) and emission intensity (at 570 nm). The solvatochromic mechanism is caused by solvent-induced equilibrium shift to ring-opening of spirolactam form (Z-form).

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How to Cite
P. Chansri, B. Wanno, และ C. Kaewtong, “Synthesis, Structure and Solvatochromic Properties of Novel Diacetylene rhodamine-based Solvatochromic Dye”, Crma. J., ปี 17, ฉบับที่ 1, น. 165–172, ธ.ค. 2019.


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