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根据文献参数以ＰＰＰ－ＣＩ分子轨道方法计算了丁二烯类紫外吸收剂的最大吸收波长（λ（ｍａｘ）），其值与实测值一致。该类物质摩尔消光系数ε（ｍａｘ）＞６．０×１０４，振子强度ｆ＞１。
The maximum absorption wavelength (λ (max)) of butadiene-based UV absorbers was calculated by PPP-CI molecular orbital method according to the literature parameters, and its value agrees with the measured value. The molar extinction coefficient ε (max) of these species is> 6.0 × 104, and the oscillator strength f> 1.