Yohei Sano1, Nathanael Lau1, Andrew C Weitz2, Joseph W Ziller1, Michael P Hendrich2, A S Borovik1. 1. Department of Chemistry, University of California-Irvine , 1102 Natural Sciences II, Irvine, California 92697-2025, United States. 2. Department of Chemistry, Carnegie Mellon University , Pittsburgh, Pennsylvania 15213, United States.
Abstract
Bimetallic complexes are important sites in metalloproteins but are often difficult to prepare synthetically. We have previously introduced an approach to form discrete bimetallic complexes with MII-(μ-OH)-FeIII (MII = Mn, Fe) cores using the tripodal ligand N,N',N″-[2,2',2″-nitrilotris(ethane-2,1-diyl)]tris(2,4,6-trimethylbenzenesulfonamido) ([MST]3-). This series is extended to include the rest of the late 3d transition metal ions (MII = Co, Ni, Cu, Zn). All of the bimetallic complexes have similar spectroscopic and structural properties that reflect little change despite varying the MII centers. Magnetic studies performed on the complexes in solution using electron paramagnetic resonance spectroscopy showed that the observed spin states varied incrementally from S = 0 through S = 5/2; these results are consistent with antiferromagnetic coupling between the high-spin MII and FeIII centers. However, the difference in the MII ion occupancy yielded only slight changes in the magnetic exchange coupling strength, and all complexes had J values ranging from +26(4) to +35(3) cm-1.
Bimetallic n class="Chemical">complexes are important sites in metalloproteins but are often difficult to prepare synthetically. We have previously introduced an approach to form discrete bimetallic complexes with MII-(μ-OH)-FeIII (MII = Mn, Fe) cores using the tripodal ligand N,N',N″-[2,2',2″-nitrilotris(ethane-2,1-diyl)]tris(2,4,6-trimethylbenzenesulfonamido) ([MST]3-). This series is extended to include the rest of the late 3d transition metal ions (MII = Co, Ni, Cu, Zn). All of the bimetallic complexes have similar spectroscopic and structural properties that reflect little change despite varying the MII centers. Magnetic studies performed on the complexes in solution using electron paramagnetic resonance spectroscopy showed that the observed spin states varied incrementally from S = 0 through S = 5/2; these results are consistent with antiferromagnetic coupling between the high-spinMII and FeIII centers. However, the difference in the MII ion occupancy yielded only slight changes in the magnetic exchange coupling strength, and all complexes had J values ranging from +26(4) to +35(3) cm-1.
Authors: Ryan M Clarke; Khatera Hazin; John R Thompson; Didier Savard; Kathleen E Prosser; Tim Storr Journal: Inorg Chem Date: 2015-12-31 Impact factor: 5.165
Authors: Laura J Clouston; Randall B Siedschlag; P Alex Rudd; Nora Planas; Shuxian Hu; Adam D Miller; Laura Gagliardi; Connie C Lu Journal: J Am Chem Soc Date: 2013-08-23 Impact factor: 15.419
Authors: Janice L Wong; Robert F Higgins; Indrani Bhowmick; David Xi Cao; Géza Szigethy; Joseph W Ziller; Matthew P Shores; Alan F Heyduk Journal: Chem Sci Date: 2015-12-08 Impact factor: 9.825
Authors: Justin L Lee; Saborni Biswas; Chen Sun; Joseph W Ziller; Michael P Hendrich; A S Borovik Journal: J Am Chem Soc Date: 2022-02-22 Impact factor: 16.383
Authors: Jesse B Gordon; Jeremy P McGale; Joshua R Prendergast; Zahra Shirani-Sarmazeh; Maxime A Siegler; Guy N L Jameson; David P Goldberg Journal: J Am Chem Soc Date: 2018-10-22 Impact factor: 15.419
Authors: Justin L Lee; Victoria F Oswald; Saborni Biswas; Ethan A Hill; Joseph W Ziller; Michael P Hendrich; A S Borovik Journal: Dalton Trans Date: 2021-06-15 Impact factor: 4.390