Synthesis and Self-Assembly of Shape Amphiphiles Based on POSS-Dendron Conjugates
Yu Shao,
Minyuan Ding,
Yujie Xu,
Fangjia Zhao,
Hui Dai,
Xia-Ran Miao,
Shuguang Yang,
Hui Li
Affiliations
Yu Shao
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
Minyuan Ding
School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
Yujie Xu
School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
Fangjia Zhao
School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
Hui Dai
School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
Xia-Ran Miao
Shanghai Institute of Applied Physics, Chinese Academy of Science, Shanghai 201204, China
Shuguang Yang
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
Hui Li
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
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.
