D-π-A molecules bearing strong electron donor and acceptor, 5-(4-N,N-dimethyl amino-benzylidene)-(1H,3H)-2,4,6-pyrimidinetrione(AB1) and 5-(4-N,N-dioctadecylaminobenzylidene)-(1H,3H)-2,4,6-pyrimidinetrione(AB18) were synthesized and their spectral properties were investigated. For AB1 and AB18, their UV-visible absorption spectra in cyclohexane and surface photovoltage spectra show peaks at 450 nm due to the formation of H-aggregate, which underwent a blue-shift about 30 nm than that of monomer intramolecular charge transfer(ICT) band in chloroform. The fluorescence emission band of excimer of H-aggregate in solid and at a high concentration in chloroform solution occurs at 620 nm and near 610 nm, respectively. The band at 620 nm underwent a red-shift about 3 000 cm-1 than that of monomer. In addition, intermolecular π-π interactions of such D-π-A molecules possesing strong electron donor and acceptor are discussed.%合成了具有强电子给体和强电子受体的D-π-A分子5-(4-N,N-二甲氨基苯乙烯基)-(1H,3H)-2,4,6-嘧啶三酮(AB1)和5-(4-N,N-双十八烷基氨基苯乙烯基)-(1H,3H)-2,4,6-嘧啶三酮(AB18)，并对其电子光谱进行了研究. AB18在环己烷中聚集体的吸收光谱及AB1和AB18的表面光电压谱在450 nm附近出现H-聚集体的谱带，比其在氯仿溶液中单体的ICT带蓝移了30 nm左右. AB1和AB18固体及其高浓度的氯仿溶液分别在620 nm和610 nm附近出现来源于H-聚集体的激基缔合物的荧光， 620 nm带比单体红移3 000 cm-1左右. 还探讨具有强电子给体和受体的D-π-A分子间π-π相互作用.
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