Excited states of transition metal complexes for medical applications and solar energy conversion

Claudia Turro; Rebekah A. Wroblewski

doi:10.1117/12.2613362

7 March 2022 Excited states of transition metal complexes for medical applications and solar energy conversion

Proceedings Volume 11998, Organic Photonic Materials and Devices XXIV; 1199806 (2022) https://doi.org/10.1117/12.2613362
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Dirhodium(II,II) complexes are shown to possess excited states accessible with visible to near-IR light that are able to undergo reactivity for applications ranging from photochemotherapy to solar energy conversion. In particular, cis– [Rh₂(DPhF)₂(bncn)₂]²⁺ (DPhF = N,N'-diphenylformamidinate, bncn = benzocinnoline; 1) is able to act as a single-molecule photocatalyst for the generation of hydrogen from acidic solutions in the presence of a sacrificial electron donor when irradiated with red/near-IR light. The water solubility of 1 led us to investigate its photoreactivity towards DNA. Complex 1 is able to photocleave DNA at pH = 5.3 upon irradiation with visible light, however, no photocleavage is observed at neutral pH. The binding of 1 to DNA was investigated and likely interacts with the polyanionic double helix through multiple modes, including electrostatic interactions, covalent coordination, and/or partial intercalation.

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Claudia Turro and Rebekah A. Wroblewski "Excited states of transition metal complexes for medical applications and solar energy conversion", Proc. SPIE 11998, Organic Photonic Materials and Devices XXIV, 1199806 (7 March 2022); https://doi.org/10.1117/12.2613362

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