吲哚碳菁染料的合成及其光谱特性的研究

Synthesis and Spectral Characterization of Indocarbocyanine dyes

将(未)取代的1-(3′-磺酸丙基)-2,3,3-三甲基吲哚啉内盐与原乙酸三乙酯在吡啶或酸酐中回流合成了五个氮原子上带有磺酸丙基的取代吲哚碳菁染料。这些染料和杂环氮原子上带有烷基取代的吲哚碳菁相比,它们具有较高的熔点,在极性溶剂中具有较高的溶解度。这些染料的最大吸收值在540～580nm之间,并具有较高的消光系数(1～2×10~5L·mol^(-1)·cm^(-1))。

Five new substituted indocarbocyanine dyes with N- sulfonic acid moiety were synthesized by refluxing a selected 1-(3'-sulfopropyl)-2, 3, 3-trimethyl-indolenine salt with etheyl orthoformate in pyridine or acetic anhydride. In comparison with the N-alkyl partner these dyes exhibit higher melting points and higher solubility in polar solvent. Absorption maxima of these dyes are in the range 540- 580nm with higher extinction coefficient (1- 2×105L · mol-1· cm-1).