Schiff base oligopyrrolic macrocycles as ligands for lanthanides and actinides

Jonathan L. Sessler, Patricia J. Melfi, Elisa Tomat, Wyeth Callaway, Michael T. Huggins, Pamela L. Gordon, D. Webster Keogh, Richard W. Date, Duncan W. Bruce, Bertrand Donnio

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The coordination of f-block cations with Schiff base oligopyrrolic macrocycles is discussed. Analysis of the mesophase of a uranyl 2,5-diformylpyrrole-derived expanded porphyrin complex through temperature-dependent X-ray diffraction (XRD) methods has provided evidence for liquid-crystalline properties, and for molecular stacking into columns, arranged in a 2D hexagonal lattice. In separate studies, UV-vis spectral analysis has indicated the formation of three new f-block oligopyrrolic complexes. Addition of neptunyl ([NpO2]2+) or plutonyl ([PuO2]2+) chloride salts to the free base of a dipyrromethane-derived Schiff base macrocycle induces an immediate spectral change, namely the growth of a Q-like band at 630 nm. Such changes in the absorption spectra cause a dramatic color change from pale yellow to blue. It is postulated that oxidation of this macrocycle, stimulated by reduction of the metal center, leads to the observed spectral changes. An immediate visible and spectral change is also observed with the reaction of lutetium silylamide (Lu[N(Si(CH3)3)2]3), with a different, tetrapyrrole-containing Schiff base macrocycle. In this case, the formation of a complex with 1:1 metal-to-ligand binding stoichiometry is further supported by MALDI-TOF mass spectrometry.

Original languageEnglish (US)
Pages (from-to)171-177
Number of pages7
JournalJournal of Alloys and Compounds
Volume418
Issue number1-2
DOIs
StatePublished - Jul 20 2006
Externally publishedYes

Fingerprint

Actinoid Series Elements
Lanthanoid Series Elements
Schiff Bases
Actinides
Rare earth elements
Ligands
Lutetium
Porphyrins
Metals
Tetrapyrroles
Stoichiometry
Spectrum analysis
Mass spectrometry
Absorption spectra
Positive ions
Salts
Crystalline materials
Color
X ray diffraction
Oxidation

Keywords

  • Chemical synthesis
  • Liquid crystals
  • X-ray diffraction

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Sessler, J. L., Melfi, P. J., Tomat, E., Callaway, W., Huggins, M. T., Gordon, P. L., ... Donnio, B. (2006). Schiff base oligopyrrolic macrocycles as ligands for lanthanides and actinides. Journal of Alloys and Compounds, 418(1-2), 171-177. https://doi.org/10.1016/j.jallcom.2005.06.089

Schiff base oligopyrrolic macrocycles as ligands for lanthanides and actinides. / Sessler, Jonathan L.; Melfi, Patricia J.; Tomat, Elisa; Callaway, Wyeth; Huggins, Michael T.; Gordon, Pamela L.; Webster Keogh, D.; Date, Richard W.; Bruce, Duncan W.; Donnio, Bertrand.

In: Journal of Alloys and Compounds, Vol. 418, No. 1-2, 20.07.2006, p. 171-177.

Research output: Contribution to journalArticle

Sessler, JL, Melfi, PJ, Tomat, E, Callaway, W, Huggins, MT, Gordon, PL, Webster Keogh, D, Date, RW, Bruce, DW & Donnio, B 2006, 'Schiff base oligopyrrolic macrocycles as ligands for lanthanides and actinides', Journal of Alloys and Compounds, vol. 418, no. 1-2, pp. 171-177. https://doi.org/10.1016/j.jallcom.2005.06.089
Sessler, Jonathan L. ; Melfi, Patricia J. ; Tomat, Elisa ; Callaway, Wyeth ; Huggins, Michael T. ; Gordon, Pamela L. ; Webster Keogh, D. ; Date, Richard W. ; Bruce, Duncan W. ; Donnio, Bertrand. / Schiff base oligopyrrolic macrocycles as ligands for lanthanides and actinides. In: Journal of Alloys and Compounds. 2006 ; Vol. 418, No. 1-2. pp. 171-177.
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