Poly(p-vinylbenzoic acid)-block-polystyrene Self-assembled Structures as Templates in the Synthesis of ZIF-8.
Hybrid nanocrystals of PVBA-b-PS/ZIF-8 were prepared by the growth of ZIF-8 on the surface of the self-assembled structures from poly(p-vinylbenzoic acid)-block-polystyrene. Two different morphologies-micelles and vesicles-were obtained in selective solvents owing to the different ratios of PVBA to PS blocks. The structure and morphology of the PVBA-b-PS/ZIF-8 composites were characterized by Fourier transform IR spectroscopy, thermogravimetric analysis, X-ray diffraction, transmission electron microscopy and scanning electron microscopy. PVBA-b-PS/ZIF-8 showed high catalytic performance in Knoevenagel condensation reactions at room temperature, which were attributed to the more exposed active sites of the small ZIF-8 nanocrystals grown in a confined space and a high concentration of reactants in the polymeric aggregates.
Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China.
Yongfang
Y
Yang
Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China.
Hua
H
Li
Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China.
Yue
Y
Zhang
Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China.
Hefang
H
Wang
Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China.
Lidong
L
Xu
Key Laboratory of Functional Polymer Materials, Ministry of Education, Nankai University, Tianjin, 300071, P. R. China.
Hanying
H
Zhao
Knoevenagel condensation; block copolymers; hybrid nanocrystals; metal-organic frameworks; self-assembly