TY  - JOUR
AU  - Heck, Joshua
AU  - Metz, Fabian
AU  - Buchenau, Sören
AU  - Teubner, Melissa
AU  - Grimm-Lebsanft, Benjamin
AU  - Spaniol, Thomas P.
AU  - Hoffmann, Alexander
AU  - Rübhausen, Michael A.
AU  - Herres-Pawlis, Sonja
TI  - Manipulating electron transfer – the influence of substituents on novel copper guanidine quinolinyl complexes
JO  - Chemical science
VL  - 13
IS  - 28
SN  - 2041-6520
CY  - Cambridge
PB  - RSC
M1  - PUBDB-2023-01809
SP  - 8274 - 8288
PY  - 2022
AB  - Copper guanidine quinolinyl complexes act as good entatic state models due to their distorted structures leading to a high similarity between Cu(I) and Cu(II) complexes. For a better understanding of the entatic state principle regarding electron transfer a series of guanidine quinolinyl ligands with different substituents in the 2- and 4-position were synthesized to examine the influence on the electron transfer properties of the corresponding copper complexes. Substituents with different steric or electronic influences were chosen. The effects on the properties of the copper complexes were studied applying different experimental and theoretical methods. The molecular structures of the bis(chelate) copper complexes were examined in the solid state by single-crystal X-ray diffraction and in solution by X-ray absorption spectroscopy and density functional theory (DFT) calculations revealing a significant impact of the substituents on the complex structures. For a better insight natural bond orbital (NBO) calculations of the ligands and copper complexes were performed. The electron transfer was analysed by the determination of the electron self-exchange rates following Marcus theory. The obtained results were correlated with the results of the structural analysis of the complexes and of the NBO calculations. Nelsen's four-point method calculations give a deeper understanding of the thermodynamic properties of the electron transfer. These studies reveal a significant impact of the substituents on the properties of the copper complexes. 
LB  - PUB:(DE-HGF)16
C6  - 35919707
UR  - <Go to ISI:>//WOS:000821436200001
DO  - DOI:10.1039/D2SC02910C
UR  - https://bib-pubdb1.desy.de/record/582119
ER  -