DNA Binding and Photocleavage Studies of Cobalt(III) Polypyridine Complexes: [Co(en)<sub>2</sub>PIP]<sup>3+</sup>, [Co(en)<sub>2</sub>IP]<sup>3+</sup>, and [Co(en)<sub>2</sub>phen-dione]<sup>3+</sup>
Bioinorganic Chemistry and Applications/Bioinorganic chemistry and applications