Modulation of internal charge transfer (ICT) in a bay region hydroxylated perylenediimide (PDI) chromophore: a chromogenic chemosensor for pH

详细信息    查看全文

• 作者：Funda Yukruk and Engin U. Akkaya
• 关键词：Chemosensors ; Perylenediimides ; pH Sensing ; Chromogenic sensor ; Chromophore
• 刊名：Tetrahedron Letters
• 出版年：2005
• 出版时间：2005
• 年：2005
• 卷：46
• 期：35
• 页码：5931-5933
• 全文大小：137 K

文摘

A novel perylenediimide derivative which has a bay region hydroxyl function behaves as a pH-sensitive dye. The deprotonation of the aryl-OH yields a green solution with a λub>maxub> of 692 nm and this deprotonated form has strong internal charge transfer characteristics. On reprotonation in acidic solutions, the typical PDI absorbance spectrum is restored. The experimentally determined pKub>aub> (7.45) is very close to physiological pH, therefore the most significant changes in color take place in the vicinity of this pH value.