A new triazine-based conjugated polymer from simple monomers with stable photocatalytic hydrogen evolution under visible light

A new triazine-based conjugated polymer THT-TA was constructed with simple building blocks 2,4,6-trihydrazino-1,3,5-triazine (THT) and terephthalaldehyde (TA) via solvothermal reaction. The structural characterizations confirmed the successful synthesis of the polymer, and TEM images clearly reveale...

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Bibliographic Details
Published in:Polymer (Guilford) 2020-12, Vol.211, p.123079, Article 123079
Main Authors: Cui, Zhiwei, Hu, Yue, Zhang, Yukang, Han, Qiutong, Wang, Ying, Zhou, Yong, Zou, Zhigang
Format: Article
Language:English
Subjects:
Ascorbic acid
Catalysts
Chemical synthesis
Conjugated polymer
Conjugation
Hydrogen evolution
Monomers
Morphology
Photocatalysis
Polymers
Triazine
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Summary:A new triazine-based conjugated polymer THT-TA was constructed with simple building blocks 2,4,6-trihydrazino-1,3,5-triazine (THT) and terephthalaldehyde (TA) via solvothermal reaction. The structural characterizations confirmed the successful synthesis of the polymer, and TEM images clearly revealed the sheet-like morphology. The 2D layered structure was further confirmed by XRD, and the semi-crystalline pattern was better fitted with a novel parallelogram framework rather than classic hexagonal framework. The optical band gap of THT-TA was 2.50 eV, and the frontier orbitals were delocalized across the framework from DFT calculation, validating that higher degree of conjugation was achieved from small monomers. The photocatalytic hydrogen evolution was successfully achieved with Pt as co-catalyst and sodium ascorbate as sacrificial agent under visible light (λ > 420 nm), and the sample showed considerable stability in the long-term test for more than 200 h. [Display omitted] •A new triazine-based conjugated polymer THT-TA was synthesized.•The 2D layered polymer exhibited parallelogram framework and conjugated π system.•THT-TA showed stable photocatalytic activity of H2 evolution for more than 200 h.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2020.123079