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A New Three-Dimensional (3D) Multilayer Organic Material: Synthesis, Swelling, Exfoliation, and Application

A novel fully rigid, rod-shaped oligo­(p-benzamide) (OPBA-6) molecule was designed and synthesized, which can be recrystallized into a three-dimensional (3D) multilayer material via an antiparallel molecular packing model. Intermolecular hydrogen bonding and π–π interaction are brought to ensure a s...

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Bibliographic Details
Published in:Langmuir 2013-03, Vol.29 (11), p.3813-3820
Main Authors: Xu, Lu, Huang, Youju, Li, Junjun, Wang, Daoliang, Chen, Mingming, Tao, Jiaojiao, Cui, Kunpeng, Pan, Guoqiang, Huang, Ningdong, Li, Liangbin
Format: Article
Language:English
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Summary:A novel fully rigid, rod-shaped oligo­(p-benzamide) (OPBA-6) molecule was designed and synthesized, which can be recrystallized into a three-dimensional (3D) multilayer material via an antiparallel molecular packing model. Intermolecular hydrogen bonding and π–π interaction are brought to ensure a strong intralayer interaction, while decoration of layer surface with sulfonic groups promotes water to enter interlayer space and facilitates the swelling and exfoliation of sample. With a simple dispersion in water, the obtained multilayer material can be easily swollen by water without destruction of in-plane morphology and subsequently delaminated into 2D nanosheets with thickness of about 5.38 nm. This achievement may be the first attempt to exfoliate layered organic materials and thus provide a new strategy to prepare 2D organic nanosheets without using any substrates or templates as required by conventional and widely used self-assembly routes. Based on exfoliated nanosheets, poly­(vinyl alcohol) nanocomposites were prepared using a simple water solution processing method. A 64% increase in tensile stress and a 63% improvement in Young’s modulus were achieved by addition of 7 wt % OPBA-6 loading.
ISSN:0743-7463
1520-5827
DOI:10.1021/la400206s