• 文献标题:   Microporous Spheres of Tiny Semiconducting Graphene Sheets from Hypercross-linked Polymers: Absorption and CO2 Sorption Characteristics
  • 文献类型:   Article
  • 作  者:   VINODH R, BABU CM, ABIDOV A, PENG MM, PALANICHAMY M, CHA WS, JANG HT
  • 作者关键词:   carbon capture storage, friedelcrafts reaction, hypercrosslinked polymer, quinonoid chromophore, semiconducting graphene
  • 出版物名称:   ADVANCES IN POLYMER TECHNOLOGY
  • ISSN:   0730-6679 EI 1098-2329
  • 通讯作者地址:   Hanseo Univ
  • 被引频次:   0
  • DOI:   10.1002/adv.21713
  • 出版年:   2018

▎ 摘  要

Friedel-Crafts reactions of phloroglucinol and anthracene with terephthaldehyde and the varying content of 4, 4-bis ((chloromethyl)-1, 1- biphenyl) (BCMB) yielded novel hypercross-linked polymers (HCPs). The polymer matrix carries rigid, conjugated, quinonoid blocks; they are tiny semiconducting graphene sheets, whose organization creates micropores. The reaction involves Friedel-Crafts alkylation and the subsequent dehydrogenation of -CH2- and -CH- bridges by the catalyst, FeCl3. Heating the reaction product between 500 and 600 degrees C completes dehydrogenation of residual bridges. Their FTIR spectra and DRS UV-Vis spectra confirm such results. As a result of heating, the absorption maximum shifted toward longer wavelength, and absorbance was raised. It absorbs light like semiconducting graphene covering the entire ultraviolet, visible, and partly near infrared region. The band gap of synthesized materials is close to 1.2 eV. All the HCPs are amorphous and showed CO2 capture close to 6 wt% at room temperature. The obtained materials are hydrophobic and decompose above 300 degrees C in air atmosphere. So, in addition to its application to sorption of CO2, they are also the right choice of materials for the fabrication of organic solar cells.