Silver(III)⋅⋅⋅Silver(III) Interactions that Stabilize the syn Form in a Porphyrin Dimer Upon Oxidation.
Akhil Kumar SinghFiroz Shah Tuglak KhanSankar Prasad RathPublished in: Angewandte Chemie (International ed. in English) (2017)
The interaction between two AgII porphyrins, connected covalently through a highly flexible ethane bridge, in a metalloporphyrin dimer has been investigated upon stepwise oxidation. X-ray structure determination of one and two-electron oxidized complexes has clearly revealed only metal-centered oxidation that results in short Ag-N (porphyrin) distance with large distortion in the porphyrin macrocycle. The 2e-oxidized complex exhibits significant metallophilic interaction in the form of a close AgIII ⋅⋅⋅AgIII contact that brings two porphyrin rings more cofacial with syn-conformation, which would otherwise stabilize in an anti-form. The interaction also leads to an intense emission peak at 546 nm at 77 K in the photoluminescence study.
Keyphrases
- electron transfer
- photodynamic therapy
- energy transfer
- metal organic framework
- gold nanoparticles
- quantum dots
- hydrogen peroxide
- low density lipoprotein
- visible light
- high resolution
- silver nanoparticles
- magnetic resonance imaging
- single cell
- magnetic resonance
- computed tomography
- mass spectrometry
- solid phase extraction
- atomic force microscopy
- dual energy
- electron microscopy
- simultaneous determination