Electron spin resonance of Pt(III) in anticancer platinum pyrimidine green |
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| Affiliation: | 1. Bioinspired & Biomimetic Inorganic Chemistry Lab, Department of Chemistry, National Institute of Technology Calicut, Kozhikode, Kerala 673601, India;2. Department of Chemistry, Central University of Tamil Nadu, Thiruvarur 610 005, India;3. Centre for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana 500007, India;4. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India |
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| Abstract: | The electron spin resonance (ESR) of Pt(III) in platinum pyrimidine green is investigated. The spectrum shows a typical powder pattern of uniaxial symmetry and g∥ and g⊥ are determined to be 1.991 and 2.413, respectively. It is concluded that the spectrum derives essentially from the 5dz2-like hole state of Pt(III) (5d7). The hyperfine structure of the spectrum suggests that the unpaired spin is not localized on one platinum center but has a wide orbital extended over four platinum atoms. The molecular structure is expected to resemble that of α-pyridone blue. |
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