Research on Syntheses and Properties of Water-soluble Symmetrical Squarylium Double-cyanine Dyes
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چکیده
In this paper, 2,3,3-trimethyl-3H-indolin was synthesized by phenylhydrazine and 3-methyl-2-butanone as raw materials in the acetic acid reacted with different nitrogenalkylating reagents. Semi mono-cyanine dye and semi dicyanine dye were prepared with the help of squaric acid diethyl ester. The spectral properties of the target products were checked. The results show that compared with symmetrical squarylium mono-indocyanine dyes with the same substituent, the photo-stability of the bi-cyanine dyes were much better. When dissolved in water, the dye showed shorter maximum absorption wavelength, shorter maximum emission wavelength and shorter Stokes shift and apparent aggregation. In protic solvents, dye spectra showed a blue shift effect with an increase of solution polarity, while in aprotic solvents, dye spectrum showed a red shift with solution polarity increased. Among different solvents, the photostability of the dye in methanol is strongest.
منابع مشابه
Research on Syntheses and Properties of Water-Soluble Symmetrical Squaryliurn Double-Cyanine Dyes
In this paper, 2,3,3-trimethyl-3H-indolin was synthesised by phenylhydrazine and 3-methyl-2-butanone as raw materials in the acetic acid, and then was reacted with different nitrogen lkylating reagents. The two kinds of conducts acted with squaric diethyl ester respectively to prepare mono-semicynine dye and dis-semicyanine dye. The spectral properties of the target products were checked. The r...
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