Hexagonal Layer Manganese Metal-Organic Framework for Photocatalytic CO2 Cycloaddition Reaction

Lamia A Siddig; Reem H Alzard; Ha L Nguyen; Christian R Göb; Mohamed A Alnaqbi; Ahmed Alzamly

doi:10.1021/acsomega.2c00663

Hexagonal Layer Manganese Metal-Organic Framework for Photocatalytic CO₂ Cycloaddition Reaction

ACS Omega. 2022 Mar 9;7(11):9958-9963. doi: 10.1021/acsomega.2c00663. eCollection 2022 Mar 22.

Authors

Lamia A Siddig¹, Reem H Alzard¹, Ha L Nguyen², Christian R Göb³, Mohamed A Alnaqbi¹, Ahmed Alzamly¹

Affiliations

¹ Department of Chemistry, UAE University, P.O. Box 15551, Al-Ain 00000, UAE.
² Berkeley Global Science Institute, University of California, Berkeley, California 94720, United States.
³ Rigaku Europe SE, Hugenottenallee 167, Neu-Isenburg 63263, Germany.

Abstract

A novel manganese metal-organic framework (Mn-MOF) termed UAEU-50 assembled from a benzenedicarboxylate linker (BDC) and trinuclear manganese clusters was synthesized and fully characterized using different spectroscopic and analytic techniques (e.g., X-ray powder diffraction, UV-vis diffuse reflectance spectroscopy, thermogravimetric analysis, scanning electron microscopy, and energy-dispersive X-ray spectroscopy). UAEU-50 adopted a hexagonal layer structure and exhibited superior thermal stability and robust chemical stability. Photocatalytic activities of UAEU-50 were investigated using the cycloaddition of CO₂ to different epoxides, forming cyclic carbonates. Impressively, UAEU-50 can transform up to 90% photocatalytic CO₂ conversion to cyclic carbonates in the visible-light region at ambient conditions.