三甘醇苯并香豆素甲酸酯的合成及其荧光特性

Synthesis and Fluorescent Properties of Triglycol Benzocoumarincarboxylates

摘要:

合成了新化合物三甘醇苯并[5,6]香豆素-3-甲酸酯（D）并经1H NMR、13C NMR、FT-IR、MS及元素分析确证。化合物D和三甘醇二苯并[5,6]香豆素-3-甲酸酯（E）发出蓝色荧光，它们的最大发射波长λem受溶剂极性影响较小。甲醇和乙醇能使E的荧光强度增强，二甲亚砜是该类物质的荧光猝灭试剂。在乙腈中，Ca2+能使化合物D荧光强度降低30 %，而使化合物E荧光强度增大40 %。

Abstract:

Triglycol benzo[5,6]coumarin-3-carboxylate (D) was prepared and characterized by 1H NMR, 13C NMR, FT-IR, MS and elemental analysis. Compound D and triglycol dibenzo[5,6]coumarin-3-carboxylate (E) emit blue fluorescence. The maximum emission wavelength λem of D and E was little influenced by solvent polarity. The fluorescence intensity of E was increased in methanol and ethanol, and dimethyl sulfoxide is its fluorescence quenching agent. In acetonitrile, upon the addition of Ca2+, the fluorescence intensity of D reduced by 30 %, while that of E increased by 40 %.