Adenine Components in Biomimetic Metal–Organic Frameworks for Efficient CO2 Photoconversion

• Published in: Angewandte Chemie International Edition Vol. 58; no. 16; pp. 5226 - 5231
• Main Authors: Li, Ning, Liu, Jiang, Liu, Jing‐Jing, Dong, Long‐Zhang, Xin, Zhi‐Feng, Teng, Yun‐Lei, Lan, Ya‐Qian
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 08.04.2019
• Edition: International ed. in English
• Subjects: Acetonitrile; Adenine; Aqueous solutions; biomimetic catalysis; Biomimetics; Carbon dioxide; Catalysis; hydrophobicity; Metal-organic frameworks; Photocatalysis; Photochemistry; Photoreduction; Photosynthesis; Sustainable development
• DOI: 10.1002/anie.201814729
• ISSN: 1433-7851; 1521-3773

Visible‐light driven photoconversion of CO2 into energy carriers is highly important to the natural carbon balance and sustainable development. Demonstrated here is the adenine‐dependent CO2 photoreduction performance in green biomimetic metal–organic frameworks. Photocatalytic results indicate that AD‐MOF‐2 exhibited a very high HCOOH production rate of 443.2 μmol g−1 h−1 in pure aqueous solution, and is more than two times higher than that of AD‐MOF‐1 (179.0 μmol g−1h−1) in acetonitrile solution. Significantly, experimental and theoretical evidence reveal that the CO2 photoreduction reaction mainly takes place at the aromatic nitrogen atom of adenine molecules through a unique o‐amino‐assisted activation rather than at the metal center. This work not only serves as an important case study for the development of green biomimetic photocatalysts used for artificial photosynthesis, but also proposes a new catalytic strategy for efficient CO2 photoconversion. Eco‐friendly terms: Two biomimetic metal–organic frameworks (MOFs) were assembled with eco‐friendly components and used as photocatalysts for CO2‐to‐HCOOH conversion. One of the synthesized MOFs exhibited a very high HCOOH production rate of 443.2 μmol g−1 h−1 in pure aqueous solution.