Crystalline Porous Organic Polymer Bearing -SO3H Functionality for High Proton Conductivity

Piyali Bhanja, Arnab Palui, Sauvik Chatterjee, Yusuf Valentino Kaneti, Jongbeom Na, Yoshiyuki Sugahara, Asim Bhaumik, Yusuke Yamauchi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Designing high-performing proton-conducting materials with in-built -SO3H moieties in the crystalline organic framework is very challenging in the context of developing an efficient solid electrolyte for fuel cells. Herein, we report a simple chemical route for synthesizing crystalline microporous sulfonic acid-functionalized porous organic polymers (MPOPS-1) via extended condensation polymerization between two organic monomers (i.e., cyanuric chloride and 2,5-diaminosulfonic acid) under refluxing conditions. The crystal structure of this organic framework has been indexed from powder X-ray diffraction data, revealing a monoclinic phase with a unit cell volume of 1627 Å3. The presence of in-built sulfonic acid groups in MPOPS-1 contributes significantly to the high proton conductivity of this porous organic polymer. The resulting MPOPS-1 displays proton conductivities of 1.49 × 10-5 and 3.07 × 10-2 S cm-1 at 350 K temperature under anhydrous and humid conditions, respectively, outperforming many previously reported porous organic polymers.

Original languageEnglish
JournalACS Sustainable Chemistry and Engineering
DOIs
Publication statusAccepted/In press - 2020

Keywords

  • Brønsted acidity
  • microporosity
  • porous organic polymer
  • proton conductivity
  • sulfonic acid groups

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

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