The Excited-State Creutz–Taube Ion

Pieslinger GE, Ramírez-Wierzbicki I, Cadranel A (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Angewandte Chemie International Edition Wiley

DOI: 10.1002/anie.202211747

Abstract

The excited-state version of the Creutz–Taube ion was prepared via visible light excitation of [(NH3)5RuII(μ-pz)RuII(NH3)5]4+. The resulting excited state is a mixed valence {RuIII–δ(μ-pz⋅−)RuII+δ} transient species, which was characterized using femtosecond transient absorption spectroscopy with vis-NIR detection. Very intense photoinduced intervalence charge transfers were observed at 7500 cm−1, revealing an excited-state electronic coupling element HDA=3750 cm−1. DFT calculations confirm a strongly delocalized excited state. A notable consequence of strong electron delocalization is the nanosecond excited state lifetime, which was exploited in a proof-of-concept intermolecular electron transfer. The excited-state Creutz–Taube ion is established as a reference, and demonstrates that electron delocalization in the excited state can be leveraged for artificial photosynthesis or other photocatalytic schemes based on electron transfer chemistry.

Authors with CRIS profile

Alejandro Cadranel Lehrstuhl für Physikalische Chemie I

Involved external institutions

Universidad de Buenos Aires (UBA) / University of Buenos Aires AR Argentina (AR)

How to cite

APA:

Pieslinger, G.E., Ramírez-Wierzbicki, I., & Cadranel, A. (2022). The Excited-State Creutz–Taube Ion. Angewandte Chemie International Edition. https://doi.org/10.1002/anie.202211747

MLA:

Pieslinger, German E., Ivana Ramírez-Wierzbicki, and Alejandro Cadranel. "The Excited-State Creutz–Taube Ion." Angewandte Chemie International Edition (2022).

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