Bridge-Dependent Donor-Metal-Acceptor-Metal-Donor (D-M-A-M-D) Systems: From Charge Transfer to Electron Transfer in Dioxolene-Ge-Diimine Complexes.

Autor: Arsenyeva KV; Institute of Organometallic Chemistry of, Russian Academy of Sciences, Tropinina str, 49, 603950, Nizhny Novgorod, Russian Federation., Klimashevskaya AV; Institute of Organometallic Chemistry of, Russian Academy of Sciences, Tropinina str, 49, 603950, Nizhny Novgorod, Russian Federation., Maleeva AV; Institute of Organometallic Chemistry of, Russian Academy of Sciences, Tropinina str, 49, 603950, Nizhny Novgorod, Russian Federation., Arsenyev MV; Institute of Organometallic Chemistry of, Russian Academy of Sciences, Tropinina str, 49, 603950, Nizhny Novgorod, Russian Federation., Chegerev MG; Institute of Physical and Organic Chemistry at, Southern Federal University, Stachka Avenue 194/2, 344090, Rostov-on-Don, Russian Federation., Starikova AA; Institute of Physical and Organic Chemistry at, Southern Federal University, Stachka Avenue 194/2, 344090, Rostov-on-Don, Russian Federation., Yakushev IA; Institute of General and Inorganic Chemistry of Russian Academy of Sciences Institution, Leninsky pr., 31, 119991, Moscow, Russian Federation., Cherkasov AV; Institute of Organometallic Chemistry of, Russian Academy of Sciences, Tropinina str, 49, 603950, Nizhny Novgorod, Russian Federation., Piskunov AV; Institute of Organometallic Chemistry of, Russian Academy of Sciences, Tropinina str, 49, 603950, Nizhny Novgorod, Russian Federation.
Jazyk: angličtina
Zdroj: ChemPlusChem [Chempluschem] 2024 Sep 13, pp. e202400504. Date of Electronic Publication: 2024 Sep 13.
DOI: 10.1002/cplu.202400504
Abstrakt: Synthesis and structural characterization of a family of germanium-dioxolene complexes with ditopic N-donor ligands (L 1 -L 5 ) (L 1 =1,2-bis(pyridin-2-ylmethylene)hydrazine L 2 =1,6-bis-(pyridin-2-yl)-2,5-diaza-1,5-hexadiene, L 3 =N,N-bis(pyridin-2-ylmethylene)-1,4-benzenediamine, L 4 =N,N-bis(pyridin-2-ylmethylene)-(biphenyl)-4,4-diamine, L 5 =2,2'-azopyridine) is reported. The reaction of germanium bis-catecholate with bridging ligands L 1 - L 4 , differing by the nature of the linker between pyridine sites gives rise to dinuclear digermanium complexes (36Cat 2 Ge) 2 L 1-4 (36Cat=dianion of 3,6-di-tert-butylcatechol) 1-4 of DMAMD type (donor-metal-acceptor-metal-donor) with a charge transfer in the UV-Vis region. In opposite, the interaction of the 36Cat 2 Ge with 2,2'-azopyridine (L 5 ) results in the two-electron transfer from the donor 36Cat 2- ligands to the azopyridine bridge forming stable open-shell complex 5 [(36SQ)(36CatGe)] 2 (L 5 ) 2- (36SQ=radical-anionic semiquinonate ligand). Molecular structures of compounds 3 and 5 were determined by single crystal X-ray diffraction analysis. Electronic structures of complexes 1-5 were studied by means of DFT calculations.
(© 2024 Wiley-VCH GmbH.)
Databáze: MEDLINE
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