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Supporting information associated with the manuscript contain schematic representation of the ligand aphaOEt and Pt(II) complex 1, tabular representation of the substrates used for growing of microorganisms, 1H, 13C (experimental and calculated) and 15N NMR spectral data (derived from 1H–15N HMBC and HSQC spectra) of the ligand aphaOEt and the complex 1, the log sigmoid dose–response curves of free radical scavenging activity of the complexes 14, electrophoregram of plasmid pET20b form treated with in situ generated OH• radical in the presence or absence of the complexes, and experimental procedure and results of antimicrobial activity evaluation for the complexes and standard antimicotic/antibiotics. They can be obtained from the corresponding author upon request.

Scheme S1. Structures of aphaOEt and Pt(II) complex 1 along with atom numbering scheme. Figure S1. The log sigmoid dose–response curves of free radical scavenging activity of the complexes 14.

Figure S2. Electrophoregram of OC, Lin, and SC form of plasmid pET20b treated with in situ generated hydroxyl radical in the presence or absence of the complexes (Legend: c = DNA control; c* = DNA + H2O2 + UV; 1 = DNA + 1 + H2O2 + UV; 2 = DNA + 2 + H2O2 + UV; 3 = DNA + 3 + H2O2 + UV; 4 = DNA + 4 + H2O2 + UV).

Figure S3. Representative antimicrobial activity plots for the complexes 14 and standard antimicotic/antibiotics. The following antibiotics were used as standards: nystatin (all fungi strains), penicillin (L. monocytogenes and E. faecalis), chloramphenicol (B. cereus, G. stearothermophilus and Y. enterocolitic), gentamycin (E. coli O157:H7, S. enteritidis, and S. sonnei), amoxycyclin (P. aeruginosa and P. hauseri), and ampicillin (S. aureus).

Table S2. 1H and 13C NMR spectral data of the ligand aphaOEt and the complex 1.

Table S3. 15N NMR spectral data (derived from 1H–15N HMBC and HSQC spectra) of the ligand aphaOEt and the complex 1.

Table S4. Antimicrobial activities of the investigated compounds tested by the disc-diffusion method (inhibition zone size including disc, mm).

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