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[Pt(IQ)(DMSO)Cl](1)with 5,7-diiodo-8-hydroxyquinoline(H-IQ),were synthesized and fully characterized.1 is more selectively cytotoxic to Hep-G2 cells versus normal liver cells.Furthermore,1 acted as telomerase inhibitors targeting G-quadruplex DNA and triggered cell senescence and apoptosis by interacting with telomeric and c-myc G-quadruplexes.In addition,1 also caused mitochondrial dysfunction.