为了研究模拟白酒环境中乙酸乙酯荧光衰减的影响，采用测得不同体积分数的乙酸乙酯乙醇水溶液的稳态及时间分辨荧光光谱结合量子化学计算的方法，进行了实验测量和理论分析。结果表明，乙酸乙酯的荧光峰值分别在407nm和431nm，荧光寿命均约为1.4ns；不同体积分数乙酸乙酯乙醇水溶液衰减过程中有两种荧光寿命，其中短寿命成分为乙酸乙酯，长寿命成分为乙酸乙酯和乙醇、水分子形成的多聚体结构；多聚体结构中分子间相互作用使得乙酸乙酯的平面性提高，这有利于辐射跃迁;水分子通过氢键和范德华力连接乙酸乙酯和乙醇的二聚体形成层状结构，阻碍了荧光体的运动，从而减少非辐射跃迁，使得荧光寿命延长。这一结果有助于丰富白酒中有机物的检测方法，也为研究溶剂环境对分子构象及光谱特性变化提供了一定的帮助。

In order to study effect of fluorescence decay of ethyl acetate in the simulated liquor environment, the steady-state and time-resolved fluorescence spectra of ethyl acetate ethanol aqueous solution with different volume fractions were measured. Combined with quantum chemical calculation, experimental measurements and theoretical analysis were carried out. The results show that, for ethyl and acetate, there are two fluorescence peaks at 407nm and 431nm, respectively. Fluorescence lifetime is about 1.4ns. There are two fluorescence lifetimes in the decay process of ethyl acetate ethanol aqueous solution with different volume fractions. The short-life component is ethyl acetate. The long-life component is polymer structure formed by ethyl acetate, ethanol and water molecules. Intermolecular interaction in the structure of the polymer improves the planarity of ethyl acetate. This is conducive to radiation transition. Water molecules connect ethyl acetate and ethanol through hydrogen bonds and van der Waals forces to form layered structures, block the movement of the fluorescent body, reduce non-radiative transitions, and prolong fluorescence lifetime. This result is helpful to enrich the detection methods of organic compounds in liquor. It is also helpful to study the changes of molecular conformation and spectral characteristics in solvent environment.