Easily Switchable 18π-, 19π-, and 20π-Conjugation of Diazaporphyrin Double-Pincer Bispalladium Complexes.
Takahiro SakuraiYuya HiraokaHisaaki TanakaYoshihiro MiyakeNorihito FukuiHiroshi ShinokuboPublished in: Angewandte Chemie (International ed. in English) (2023)
Ni II 3,7,13,17-tetrapyridyl-5,15-diazaporphyrin serves as a double tridentate ligand to Pd II ions to provide a pincer-type bispalladium complex. Electrochemical analysis revealed that the bispalladium complex shows excellent ability to accept electrons and reversible redox properties due to the coordination of the two cationic Pd II centers to the meso-nitrogen atoms. We isolated and characterized one- and two-electron reduction species of the bispalladium complex. The 20π antiaromatic nature of the two-electron reduction species was confirmed by 1 H NMR spectroscopy, UV/Vis-near-IR (NIR) absorption spectra, and density functional theory (DFT) calculations. X-ray diffraction revealed highly twisted structures for the bispalladium complexes regardless of the oxidation state.
Keyphrases
- density functional theory
- molecular dynamics
- electron transfer
- high resolution
- electron microscopy
- single cell
- gold nanoparticles
- photodynamic therapy
- magnetic resonance imaging
- nitric oxide
- quantum dots
- mass spectrometry
- computed tomography
- label free
- crystal structure
- molecular docking
- solar cells
- molecularly imprinted
- amino acid
- water soluble