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Synthesis and characterization of a series of mixed transition metal oxido cubanes (MMnO_4)

Suseno, Sandy and Kaiser, Jens and Tran, Rosalie and McCrory, Charles C. and Rittle, Jonathan and Yano, Junko and Agapie, Theodor (2014) Synthesis and characterization of a series of mixed transition metal oxido cubanes (MMnO_4). In: 248th American Chemical Society National Meeting & Exposition, August 10-14, 2014, San Francisco, CA.

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Mixed transition metal oxides are central to the development of materials for oxygen evolution reaction, oxygen redn. reaction, and energy storage. Discreet clusters contg. mixed transition metal-oxido moiety were targeted. A series of heterometallic trimanganese-tetraoxido cubanes (M'Mn_3O_4) supported by a trisalkoxy-hexapyridyl ligand with a 1, 3,5-triarylbenzene spacer were previously reported where M' is a redox-inactive metal. Transmetallation of the Ca^2+ center of [CaMn_3O_4] with M^2+ salts (M = Fe, Co, Ni, Cu) yielded the mixed transition metal manganese-oxido cubanes (MMn_3O_4). The series of complexes was characterized by single crystal X-ray diffraction, dispersive difference diffraction anal., cyclic voltammetry, Mossbauer spectroscopy, and X-ray absorption spectroscopy. Dispersive difference diffraction anal. confirmed that the Mn centers remain at their original sites within the cubane moiety upon transmetallation of the Ca by other metals. Cyclic voltammetry studies show significant changes in the Mn^(IV)_3/Mn^(III)Mn^(IV)_2 redox potentials as a function of metal M. Through Mossbauer spectroscopy, XANES, and X-ray diffraction studies, it was detd. that redox reactions occur at Mn centers instead of M. These well-defined complexes have been employed as precursors for heterogeneous water oxidn. electrocatalysts.

Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription Website
Kaiser, Jens0000-0002-5948-5212
McCrory, Charles C.0000-0001-9039-7192
Yano, Junko0000-0001-6308-9071
Agapie, Theodor0000-0002-9692-7614
Alternate Title:Synthesis and characterization of a series of mixed transition metal oxido cubanes (MMnO4)
Additional Information:© 2014 American Chemical Society.
Record Number:CaltechAUTHORS:20140812-111925530
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48381
Deposited By: Tony Diaz
Deposited On:12 Aug 2014 18:28
Last Modified:09 Mar 2020 13:18

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