三甲基硅、三甲基锗和三甲基锡取代的一系列芘衍生物的紫外吸收和荧光性质

UV Absortion and Fluorescence Properties of Pyrene Derivatives with Trimethylsilyl,Trimethylgermyl,and Trimethylstannyl Groups

被三甲基硅(Me3Si—)、三甲基锗(Me3Ge—)和三甲基锡(Me3Sn—)取代的芘衍生的紫外吸收波长和未取代的芘相比较,波长红移。一,二,三,四取代三甲基硅芘最大吸收波长红移小于10nm。荧光强度和周期按Me3SiAr>Me3GeAr>Me3SnAr顺序减弱。1,3,6,8-四-三甲基硅芘的荧光强度在一系列芘衍生物中是最大的。

UV absorption maxima of trimethylsilyl, trimethylgermyl, and trimethylstanny—sunstituted pyrenes shifted to longer wavelength than that of unsubstituted pyrene. Absorption maxima of mono-, bis-, tris-, and tetrakis （trimethylsilyl） pyrenes shifted to longer wavelength consecutively at intervals of 10nm. Fluorescence intensities and lifetimes decreased in the order of Me3SiAr〉Me3GeAr 〉 Me3SnAr. Fluorescence intensity of 1,3, 6,8-tetrakis （trimethylsilyl） pyrene was the largest among those of a series of pyrenes Derivatives.