Graphitic Carbon Nitride and Heptazine-Based Building Blocks

Graphic carbon nitride (g-C₃N₄, 1) has received a great deal of attention as a metal-free photocatalyst due to promising properties such as water splitting and organic matter removal in recent years.¹⁾ Melem (2) and heptazine chloride (3), which are partial structures of g-C₃N₄, are useful for a precise synthesis of g-C₃N₄ inspired materials and comparison of its physical properties. They are also applied for a monomer unit of MOF and COF.²⁾ Moreover, in light-emitting material derivatized from 3, a delayed fluorescence from inverted singlet - triplet excited states (DFIST) has been demonstrated; in other words, it has negative ΔE_ST.³⁾ The development of a stable and efficient OLED based on DFIST mechanism is expected.

References

• 1) Graphitic Carbon Nitride (g-C₃N₄)-Based Photocatalysts for Artificial Photosynthesis and Environmental Remediation: Are We a Step Closer To Achieving Sustainability?
• • W.-J. Ong, L.-L. Tan, Y. H. Ng, S.-T. Yong, S.-P. Chai, Chem. Rev. 2016, 116, 7159.
• 2) Embedding Carbon Nitride into a Covalent Organic Framework with Enhanced Photocatalysis Performance
• • J. Pan, L. Guo, S. Zhang, N. Wang, S. Jin, B. Tan, Chem. Asian J. 2018, 13, 1674.
• 3) Delayed Fluorescence from Inverted Singlet and Triplet Excited States
• • N. Aizawa, Y.-J. Pu, Y. Harabuchi, A. Nihonyanagi, R. Ibuka, H. Inuzuka, B. Dhara, Y. Koyama, K. Nakayama, S. Maeda, F. Araoka, D. Miyajima, Nature 2022, 609, 502.

Related Compounds

T0337

Melamine Monomer

T3688

2,4,6-Triformylphloroglucinol

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