The Directional Crystallization Process of Poly (triazine imide) Single Crystals in Molten Salts

Xiaocong Liang, Sikang Xue, Can Yang, Xiaoyuan Ye, Yulan Wang, Qidi Chen, Wei Lin, Yidong Hou, Guigang Zhang, Menny Shalom, Zhiyang Yu, Xinchen Wang

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Poly (triazine imide) photocatalysts prepared via molten salt methods emerge as promising polymer semiconductors with one-step excitation capacity of overall water splitting. Unveiling the molecular conjugation, nucleation, and crystallization processes of PTI crystals is crucial for their controllable structure design. Herein, microscopy characterization was conducted at the PTI crystallization front from meso to nano scales. The heptazine-based precursor was found to depolymerize to triazine monomers within molten salts and KCl cubes precipitate as the leading cores that guide the directional stacking of PTI molecular units to form aggregated crystals. Upon this discovery, PTI crystals with improved dispersibility and enhanced photocatalytic performance were obtained by tailoring the crystallization fronts. This study advances insights into the directional assembling of PTI monomers on salt templates, placing a theoretical foundation for the ordered condensation of polymer crystals.

Original languageEnglish
Article numbere202216434
JournalAngewandte Chemie - International Edition
Issue number14
StatePublished - 27 Mar 2023


  • Directional Conjugation
  • Molten Salts
  • Overall Water Splitting
  • Photocatalyst
  • Polymeric Carbon Nitride

ASJC Scopus subject areas

  • General Chemistry
  • Catalysis


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