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Molecules 2017, 22(4), 622; doi:10.3390/molecules22040622

Synthesis and Self-Assembly of Shape Amphiphiles Based on POSS-Dendron Conjugates

1
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials and College of Material Science and Engineering, Center for Advanced Low-Dimension Materials, Donghua University, Shanghai 201620, China
2
School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
3
Shanghai Institute of Applied Physics, Chinese Academy of Science, Shanghai 201204, China
*
Authors to whom correspondence should be addressed.
Academic Editor: J.A.A.W. Elemans
Received: 16 February 2017 / Revised: 2 April 2017 / Accepted: 5 April 2017 / Published: 21 April 2017
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Abstract

Shape has been increasingly recognized as an important factor for self-assembly. In this paper, a series of shape amphiphiles have been built by linking polyhedral oligomeric silsesquioxane (POSS) and a dendron via linkers of different lengths. Three conjugates of octahedral silsesquioxanes (T8-POSS) and dendron are designed and synthesized and are referred to as isobutyl T8-POSS gallic acid derivatives (BPOSS-GAD-1, BPOSS-GAD-2, BPOSS-GAD-3). These samples have been fully characterized by 1H-NMR, 13C-NMR, Fourier transform infrared (FT-IR) spectroscopy and matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry to establish their chemical identity and purity. Driven by different interactions between POSS and dendron, ordered superstructure can be found upon self-assembly. The stabilities and structures of these samples are further studied by using differential scanning calorimetry (DSC), small-angle X-ray scattering (SAXS), wide-angle X-ray diffraction (WAXD), and molecular simulations. The results show that their melting points range from 74 °C to 143 °C and the molecular packing schemes in the assemblies can form lamellar structure of BPOSS-GAD-3 as determined by the different linkers. View Full-Text
Keywords: shape amphiphiles; dendrimer; polyhedral oligomeric silsesquioxane; hierarchical structure shape amphiphiles; dendrimer; polyhedral oligomeric silsesquioxane; hierarchical structure
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Shao, Y.; Ding, M.; Xu, Y.; Zhao, F.; Dai, H.; Miao, X.-R.; Yang, S.; Li, H. Synthesis and Self-Assembly of Shape Amphiphiles Based on POSS-Dendron Conjugates. Molecules 2017, 22, 622.

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