Halogen-bond/hydrogen-bond donor hybrid catalysts for carbon dioxide fixation
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Updated: Oct 31, 2026

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
Yuki Chiba1, Ryosuke Gosho1, Shota Michii1
1Department of Applied Chemistry, Graduate School of Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan. haraguchi.ryosuke@chibatech.ac.jp.
Abstract:
Hydroxymethyl-functionalized iodotriazolium halides were developed as highly active catalysts for the cycloaddition of carbon dioxide to epoxides. The optimized catalyst 3j promoted the cycloaddition of CO2 to styrene oxide at a catalyst loading of 0.1 mol % under 1 atm of CO2, achieving a TON of 640. Control experiments support the contributions of the halogen-bond donor, hydrogen-bond donor, and nucleophilic counteranion to the catalytic activity. Catalyst 3a also promoted double and triple CO2 cycloadditions with selected multifunctional epoxides at a catalyst loading of 15 mol % under 1 atm of CO2.
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