Publications by authors named "David H Metcalf"
Article Synopsis
- The study investigates energy transfer between specific lanthanide and transition metal complexes in acetonitrile using chiroptical luminescence techniques.
- Energy donors are a mix of Eu3+ or Tb3+ complexes and acceptors are Co(R,R-chxn)3 3+ complexes, with unquenched luminescence lifetimes analyzed from 263-333 K.
- Results indicate that while the overall luminescence quenching efficiency is lower in acetonitrile due to incomplete salt dissociation, the enantiopreferential behavior remains consistent between the solvent conditions.
The synthesis of a series of polymeric Eu(III) complexes with polyester ligands, along with supporting emission spectra, luminescence lifetimes, and, for a Eu block copolymer film, atomic force microscopy (AFM) data, is presented. Dibenzoylmethane was derivatized with a hydroxyl initiator site (dbmOH, 1) for tin octoate catalyzed ring opening polymerization of dl-lactide. The resulting poly(lactic acid) macroligand, dbmPLA (2), was combined with EuCl3 to generate Eu(dbmPLA)3 (3).
View Article and Find Full Text PDFArticle Synopsis
- This study explores the crystal-field energy levels of Tb(3+) ions in the single crystal Na(3)[Tb(oda)(3)].2NaClO(4).6H(2)O using polarized optical absorption and emission measurements, covering specific wavelength ranges.
- A total of 95 energy levels were identified, revealing the complex multiplet structure of the Tb(3+) ions and highlighting the crystal's D(3) site symmetry and the chiral nature of the Tb(oda)(3)(3-) complexes.
- The research also analyzes the data through a model Hamiltonian to understand the interactions of the 4f electrons with the crystal field, comparing these findings to other similar systems for further