新型香豆素硼氟荧光染料的合成及其光学性能

以邻氨基苯甲酸甲酯和4-二乙胺基水杨醛为原料，合成了一个新的香豆素喹啉衍生物3-{2-［8-(1H-苯并咪唑-2-基)喹啉-2-基］乙烯基}-7-二乙胺基香豆素(QMC)，再与BF₃·Et₂O配位合成了硼氟配合物(BQMC)，其结构经¹H NMR和MS(ESI)表征。并对BQMC的光学性能进行了研究。结果表明：BQMC的最大吸收波长在二氧六环中为490 nm，在DMSO中为532 nm； BQMC的最大发射波长在正己烷中为618 nm，在DMSO中为679 nm，与配体QMC相比，最大吸收波长红移了近50 nm，最大发射波长红移了近100 nm， BQMC的Stokes位移值从115 nm增至183 nm。在固态下，BQMC在750~825 nm之间有较宽的荧光发射峰，具有较强荧光。

Synthesis and Optical Properties of A Novel Coumarin Boron Difluoride Complex

3-{2-8-(1H-benzimidazol-2-yl) quinolin-2-yl] ethenyl}-7-diethylaminocoumarin ( QMC) was synthesized by the reaction of methyl anthranilate with 4-diethylamino salicylaldehyde .A novel coumarin boron difluoride complex(BQMC) was obtained by coordination of QMC with BF3· Et2O. The structure was characterized by 1H NMR and MS ( ESI ) .The optical properties of BQMC were in-vestigated .The results indicated that the maximum absorption wavelength of BQMC were 490 nm in dioxane and 532 nm in DMSO.The maximum emission wavelength of BQMC were 618 nm in n-hex-ane and 679 nm in DMSO.Compared with the ligand QMC, BQMC showed a nearly 50 nm red shift of the maximum absorption wavelength and a nearly 100 nm red shift of the maximum emission wave-length.And the Stokes shift of BQMC increased from 115 nm to 183 nm.In the solid membrane, BQMC had a wide fluorescence emission peak between 750 nm and 825 nm and exhibited strong fluo-rescence .