Electronic coupling in heterobimetallic porphyrin dimers: A spectroscopic investigation
| Main Authors: | Satabdi Roy, Sayantani Banerjee, Sarnali Sanfui, Sankar Prasad Rath |
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| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 2020
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5656072 |
Daftar Isi:
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208 016, Urrar Pradesh, India Equal contribution. E-mail: sprath@iitk.ac.in Manuscript received online 16 November 2020, revised and accepted 27 December 2020 We have reported here the synthesis, structure and spectroscopic properties of Co(II)-Fe(III) heterobimetallic ethane and ethenebridged porphyrin dimers and investigated spin coupling between two paramagnetic metal centers that would possibly occur either through the bond or through space. X-Ray structures of one homobimetallic and one heterobimetallic complexes are reported here. UV-Vis spectrum of heterobimetallic complex is clearly distinguishable from its homobimetallic analogs: a split in the Soret band is distinctly visible for homobimetallic complex while a sharp band was observed for heterobimetallic complex. Both Fe(III) and Co(II) centers are paramagnetic and interactions between them have been scrutinized using variable temperature NMR (in solution) and magnetic studies (in the solid state). 1H NMR spectra of the heterobimetallic complexes are distinctly different compared to their homobimetallic analogs.