Experimental and computational investigation of heteroatom substitution in nucleolytic Cu(ii) cyclen complexes for balancing stability and redox activity

Abstract

Cu(II) complexes of six heteroatom-substituted cyclen-based ligands CuL1–CuL6 were synthesized and characterized. The corresponding ligands L1–L6 comprise different donor sets including S and O atoms. Whereas L1 is commercially available,...

Mixed Thioether/Amine‐Functionalized Expanded Calixarenes, Related Macropolycycles, and Metal Complexes thereof

“…The half-wave reduction potential in aqueous solution of the copper(II) complex of the macrocycle [12]aneNS 3 , which has the same donor atom set as 6, was À 0.14 V vs. Fc + /Fc; [23] In the case of the Cu(I) complex of the tripod [N 2 S 2 ] ligand N,N-(2pyridylmethyl)bis(2-methyl-thiobenzyl)amine in dichloromethane, the E 1/2 value was 0.23 V vs. Fc + /Fc. [24] Therefore, the oxidation potential of complex [Cu(6)] + is in the expected range.…”