Defining the origins of multiple emission/excitation in rhenium-bisthiazole complexes

Nicholas Azzarelli, Shashikanth Ponnala, Alexander Aguirre, Sara J. Dampf, Margaret P. Davis, Michael T. Ruggiero, Valerie Lopez Diaz, John W. Babich, Michael Coogan, Timothy Korter, Robert P. Doyle, Jon Zubieta

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The underlying mechanism of the unusual emissive behavior of [Re(CO)3-1,1-bis-4-thiazole-(1,4)-diaminobutane)] bromide (4-BT) has been investigated. Synthesis and spectroscopic characterization of structurally similar isomers ([Re(CO)3-1,1-bis-2-thiazole-(1,4)-diaminobutane)] bromide (2-BT)) and the location of triplet states, solid state and low temperature spectroscopic measurements, and DFT calculations show that the photophysical properties are not due to photoisomerization as previously hypothesized. The results show that the unusual emissive behavior is not observed in structural isomers, is specific to the previously reported complex, 4-BT, and may arise from vibrational energy relaxation and vibrational cooling. Translation of the unusual emissive behavior to the solid state offers an interesting platform allowing this complex to be potentially utilized as a probe, sensor or photonic device.

Original languageEnglish (US)
Pages (from-to)301-309
Number of pages9
JournalInorganica Chimica Acta
Volume489
DOIs
StatePublished - Apr 1 2019

Keywords

  • DFT
  • Fluorescence
  • Kasha-Vavilov Rule
  • Rhenium tricarbonyl
  • Solid state fluorescence
  • Thiazole ligands
  • X-ray crystallography

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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  • Cite this

    Azzarelli, N., Ponnala, S., Aguirre, A., Dampf, S. J., Davis, M. P., Ruggiero, M. T., Lopez Diaz, V., Babich, J. W., Coogan, M., Korter, T., Doyle, R. P., & Zubieta, J. (2019). Defining the origins of multiple emission/excitation in rhenium-bisthiazole complexes. Inorganica Chimica Acta, 489, 301-309. https://doi.org/10.1016/j.ica.2019.01.028