Contaminants of Emerging Concern (CEC) are typically anthropogenic organic compounds such as dyes, pesticides, pharmaceuticals, etc., which are becoming increasingly prevalent in wastewater and tend to escape current water purification efforts. In this work, we describe synthetic strategies leading to polymerizable Cu, Fe, and Mn complexes of cross-bridged tetraazamacrocycles. Complexes of this type are known, water stable, broad spectrum homogeneous oxidation catalysts that can use green oxidants, such as hydrogen peroxide and dioxygen, to modify a variety of organic functional groups. In a viable wastewater purification scheme, such catalysts would need to be made heterogeneous so that they can be recycled and used to treat multiple aliquots of wastewater. We are developing monomeric analogues of the known cross-bridged tetraazamacrocycles which have polymerizable pendant arms, with a goal of copolymerization with known polymer types to produce heterogeneous recyclable oxidation catalysts. We present here allyl, benzyl, and primary amine pendant armed cross-bridged tetraazamacrocycles, their Cu, Fe, and Mn complexes, and our progress in producting polymeric materials incorporating them.

Cross-bridged tetraazamacrocycle oxidation catalysts designed to be copolymerized: making heterogeneous recyclable oxidation catalysts for removal of CEC from wastewater

ACS Spring Meeting 2021

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