New Ir(III) 4,4'-dicyano-2,2'-bipyridine photosensitizers for solar fuel generation

作者：Mills Isaac N; Kagalwala Husain N; Chirdon Danielle N; Brooks Anthony C; Bernhard Stefan^*

来源：Polyhedron, 2014, 82: 104-108.

DOI：10.1016/j.poly.2014.05.012

• Iridium(III)
• Photocatalysis
• Solar fuels
• Hydrogen
• Water reduction

Two new photosensitizer complexes were synthesized featuring 4,4 '-dicyano-2,2 '-bipyridine binding moieties to better facilitate water and zinc reduction. DFT calculations, electrochemical characterization, and photophysical studies revealed the presence of a narrower HOMO-LUMO gap than 2,2 '-bipyridine analogs, and shorter excited-state lifetimes. These properties were reflected in the water reduction studies; the newly-synthesized compounds surpassed current art when using colloidal catalysts, but were less efficient when using molecular catalysts. The complexes were also shown to facilitate Zn(II) photoreduction.

• 出版日期2014-11-4