The back cover picture shows a supramolecularly‐controlled topochemical reaction of conjugated dienes under irradiation in homogeneous system. Using this method, the cyclooctadiene‐cored derivatives are synthesized very efficiently. Moreover, the cyclooctadiene tetraimidazolium derivatives can be applied as fluorescent chemosensors for thymine in aqueous solution at physiological pH (7.4). More details are discussed in the article by Han et al. on page 1040—1044.

中文翻译：

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封底

封底图片显示了均相系统中共轭二烯在超分子控制下的拓扑化学反应。使用这种方法，可以非常高效地合成以环辛二烯为核心的衍生物。此外，环辛二烯四咪唑鎓衍生物可用作生理pH（7.4）水溶液中胸腺嘧啶的荧光化学传感器。Han等人在文章中讨论了更多细节。在第1040—1044页。