pH‐induced structural transformation of N,N′‐diaspartic acid‐3, 4, 9, 10‐tetracarboxylic diimide as observed by scanning probe microscopy |
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| Authors: | Yibao Li Lei Zhu Linxiu Cheng Chunhua Liu Wei Liu Yulan Fan Xun Li Xiaolin Fan |
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| Institution: | 1. Key Laboratory of Organo‐pharmaceutical Chemistry, Gannan Normal University, Ganzhou, China;2. Material and Chemical Engineering Department, Pingxiang University, Pingxiang, China |
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| Abstract: | To investigate the acidity of aspartic acid, the N, N′‐diasparitic acid‐3, 4, 9, 10‐perylene tetracarboxylic diimide (NAAPD) was synthesized and characterized. Previous studies have examined the self‐assembly behaviours of NAAPD mainly using atomic force microscopy at various pH levels. The present study sought to examine the characteristics and dynamics of NAAPD assembly using scanning probe microscopy. Our experimental results suggest that the assembly of NAAPD nanostructures may be regulated by pH. This phenomenon may be attributed to the deprotonation and properties of the carboxyl groups within aspartic acid, which is consistent with the interactions revealed from studies using scanning tunnelling microscopy. Copyright © 2016 John Wiley & Sons, Ltd. |
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| Keywords: | self‐assembly aspartic acid scanning probe microscopy |
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