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Cyano-Ambivalence: Spectroscopy and Photophysics of [Ru(diimine)(CN-BR₃)₄]²⁻ Complexes

Ngo, Danh and Del Ciello, Sarah A. and McNicholas, Brendon J. and Sanders, Brian C. and Fajardo, Javier, Jr. and Gray, Harry B. and Winkler, Jay R. (2020) Cyano-Ambivalence: Spectroscopy and Photophysics of [Ru(diimine)(CN-BR₃)₄]²⁻ Complexes. Polyhedron, 188 . Art. No. 114692. ISSN 0277-5387. doi:10.1016/j.poly.2020.114692.

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The UV-visible absorption and luminescence spectra of [Ru(diimine)(CN)₄]²⁻ derivatives have been tuned over wide ranges through variations in solvent, substituents on the diimine ligand, and boronation of the cyanide ligands. Trifluoromethyl substitution at the 4 and 4′ positions of the diimine induces red shifts in metal-to-ligand charge-transfer (MLCT) absorption and luminescence bands. Boronation of the cyanide ligands produces substantial blue shifts in MLCT energies. The combination of diimine trifluoromethylation and cyanide boronation produces MLCT blue shifts that are about 75% as large as those produced by boronation alone.

Item Type:Article
Related URLs:
URLURL TypeDescription
Ngo, Danh0000-0001-6984-2538
Del Ciello, Sarah A.0000-0002-7571-8944
McNicholas, Brendon J.0000-0002-3654-681X
Sanders, Brian C.0000-0001-9754-1687
Fajardo, Javier, Jr.0000-0003-0612-7953
Gray, Harry B.0000-0002-7937-7876
Winkler, Jay R.0000-0002-4453-9716
Additional Information:© 2020 Elsevier Ltd. Received 4 December 2019, Accepted 24 June 2020, Available online 30 June 2020.
Record Number:CaltechAUTHORS:20200701-145206963
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Official Citation:Danh X. Ngo, Sarah A. Del Ciello, Brendon J. McNicholas, Brian C. Sanders, Javier Fajardo, Harry B. Gray, Jay R. Winkler, Cyano-ambivalence: Spectroscopy and photophysics of [Ru(diimine)(CN-BR3)4]2− complexes, Polyhedron, Volume 188, 2020, 114692, ISSN 0277-5387, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104194
Deposited By: Tony Diaz
Deposited On:01 Jul 2020 22:04
Last Modified:16 Nov 2021 18:29

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