New indeno[1,2-c]pyran-3-ones bearing different substituents at the pyran moiety were synthesized and their photophysical properties were investigated. In solution all compounds were found to be blue emitters and the trans isomers exhibited significantly higher fluorescence quantum yields (relative to 9,10-diphenylanthracene) as compared to the corresponding cis isomers. The solid-state fluorescence spectra revealed an important red shift of λmax due to intermolecular interactions in the lattice, along with an emission-band broadening, as compared to the solution fluorescence spectra.
合成了带有
吡喃基不同取代基的新型
吲哚[1,2-c]
吡喃-3-酮,研究了它们的光物理性质。在溶液中,所有化合物均为蓝色发光体,而
trans异构体相对于相应的
cis异构体表现出显著更高的荧光量子产率(相对于9,10-二苯基
蒽)。固态荧光光谱显示,由于晶格间的相互作用,λ
max发生了重要的红移,同时与溶液荧光光谱相比,发射光带宽变宽。