Tris(ethylenedioxy)benzene 3 and bis(ethylenedioxy)thiophene 4 have been synthesized starting from 2,3-dibromo-1,4-dioxene in 25 and 38% overall yields, respectively. These ethylenedioxy-fused benzene and thiophene can be easily oxidized to produce the corresponding radical cations 3•+ and 4•+ because of their high-lying HOMO levels. Interestingly, the radical cation 3•+ exhibits a fairly strong fluorescent emission at λmax 602 and 590 nm (φF = 0.40 in MeCN and 0.50 in H2SO4).

中文翻译：

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合成，结构和

从2，3-二溴-1，4-二恶烯开始，分别以25％和38％的总产率合成了三（乙二氧基）苯3和双（乙二氧基）噻吩4 。这些乙二氧基稠合的苯和噻吩由于其较高的HOMO水平，很容易被氧化产生相应的自由基阳离子3 •+和4 •+ 。有趣的是，自由基阳离子3种•+表现出相当强的荧光发射在λ最大602和590纳米（φ ˚F =在MeCN 0.40和0.50 H中2 SO 4 ）。