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An x-ray absorption and photoemission study of the electronic structure of Ni porphyrins and Ni N-confused porphyrin.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Krasnikov, Stepan Albertovich Sergeeva, Natalia N. Brzhezinskaya, Maria Preobrajenski, Alexeij B. Sergeeva, Yulia N. Vinogradov, Nikolay A. Cafolla, Attilio Andrew Senge, Mathias O. Vinogradov, Alexandr Sergeevich |
| Copyright Year | 2008 |
| Abstract | Investigations of chemical bonding and electronic structure features for polycrystalline (porphyrinato)nickel (II) (NiP, the simplest Ni porphyrin), (5,10,15,20-tetraphenylporphyrinato)nickel (II) (NiTPP) and (2-aza-21-carba-5,10,15,20-tetraphenylporphyrinato)nickel (II) (N-confused NiTPP, NiNCTPP) have been performed by means of high-resolution soft x-ray absorption and x-ray photoemission spectroscopy. The Ni 2p(3/2) x-ray absorption spectra show strong π-back-bonding in these compounds leading to a high-energy shift (1.2 eV for the NiP and NiTPP) of the entire absorption structure compared to Ni metal. It has been found that the main absorption line of the Ni 2p(3/2) spectrum of the NiNCTPP is shifted by an additional 0.5 eV to higher energies in comparison with those for other nickel porphyrins. This shift is evidence of stronger back-donation (metal-to-ligand charge transfer) and a smaller effective number of 3d electrons on the central Ni atom in the NiNCTPP as compared to other Ni porphyrins. The confused N atom in the NiNCTPP is of pyrrolic type (protonated nitrogen), which was confirmed by the N 1s absorption and core-level photoemission spectra. |
| Starting Page | 235207 |
| Ending Page | 235207 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.tara.tcd.ie/bitstream/handle/2262/40122/An%20X-ray.pdf?sequence=1 |
| PubMed reference number | 21694298v1 |
| Alternate Webpage(s) | https://doi.org/10.1088/0953-8984/20/23/235207 |
| DOI | 10.1088/0953-8984/20/23/235207 |
| Journal | Journal of physics. Condensed matter : an Institute of Physics journal |
| Volume Number | 20 |
| Issue Number | 23 |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Confusion Diagnostic radiologic examination Electrons Energy, Physics GIPC1 gene Ligands Photoelectron Spectroscopy Porphyrins Porphyrins:MCnt:24H:Stool:Qn Pyschological Bonding Roentgen Rays Small Supernumerary maxillary right third molar newton nickel |
| Content Type | Text |
| Resource Type | Article |
