Electronic states and (π, π*) absorption and emission characteristics of strongly coupled porphyrin dimers: sandwich complexes of Hf^IV and Zr^IV

Authors

Osman Bilsel, Washington University in St. Louis
Johann W. Buchler, Technische Universität Darmstadt
Peter Hammerschmitt, Technische Universität Darmstadt
Juan Rodriguez, Washington University in St. Louis
Dewey Holten, Washington University in St. Louis

Document Type

Article

Publication Title

Chemical Physics Letters

Abstract

Time-resolved and steady state optical measurements are reported for the sandwhich complexes consisting of two tetraphenylporphyrin macrocycles held within 3 Å by either a ZrIV or HfIV ion. Compared to monoporphyrins and weakly coupled bisporphyrins, the transition-metal sandwich complexes show new features in both the ground and excited state absorption spectra as well as a broad fluorescence red-shifted to ≈ 1 μm. A model is presented that describes the electronic states responsible for these optical features. The states arise from strong interactions between the porphyrin macrocycles and contain significant charge resonance character. © 1991.

First Page

415

Last Page

421

DOI

10.1016/0009-2614(91)90100-N

Publication Date

8-9-1991

Recommended Citation

Bilsel, Osman; Buchler, Johann W.; Hammerschmitt, Peter; Rodriguez, Juan; and Holten, Dewey, "Electronic states and (π, π*) absorption and emission characteristics of strongly coupled porphyrin dimers: sandwich complexes of Hf^IV and Zr^IV" (1991). Basic Sciences Faculty Publications. 207. https://doi.org/10.1016/0009-2614(91)90100-N
https://collections.uhsp.edu/basic-sciences_pubs/207