A colorful exchange: The concentration‐, solvent‐ and temperature‐dependent aggregation behaviors of poly(ethylene glycol)‐functionalized perylene bisimide (PEPBI) were analyzed. PEPBI exists as an aggregate dimer in aqueous solution or as a monomer in organic solvents. The reduction of PEPBI with Na₂S is slow and the monoanion radical and dianion species are the main forms of monomer. PEPBI exists predominantly as a monomer in DMF and reacts with Na₂S very fast (symbolized by the airplane shown in the cover image). The dianion species is EPR‐silent and its color highly depends on concentration in DMF. More information can be found in the Full Paper by Feifei Xing, Shourong Zhu et al. on page 1612 in Issue 11, 2017 (DOI: 10.1002/ajoc.201700334).

中文翻译：

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封面人物：树突状Per双酰亚胺的聚集行为和电子转移反应，伴随形成高度稳定的阴离子根基（Asian J. Org。Chem。11/2017）

一次丰富多彩的交流：分析了聚乙二醇功能化的bi二酰亚胺（PEPBI）的浓度，溶剂和温度依赖性聚集行为。PEPBI在水溶液中以聚集体二聚体形式存在，在有机溶剂中以单体形式存在。用Na ₂ S还原PEPBI的速度很慢，单阴离子基团和二价阴离子是单体的主要形式。PEPBI主要以单体形式存在于DMF中，并且与Na ₂ S反应非常快（由封面图像中所示的飞机表示）。二价阴离子是EPR沉默的，其颜色高度依赖于DMF中的浓度。更多信息可以在Fefeii Xing，Shourong Zhu等人的论文全文中找到。就在第11期，2017年1612页（：10.1002 / ajoc.201700334 DOI）。