Presentation Title
Synthesis and Spectroscopic Characterization of Chromium Acetylacetonato Complexes
Faculty Mentor
John Kenney
Start Date
17-11-2018 10:00 AM
End Date
17-11-2018 10:15 AM
Location
C327
Session
Oral 2
Type of Presentation
Oral Talk
Subject Area
physical_mathematical_sciences
Abstract
Multiple syntheses were carried out to prepare a series a chromium(III) transition metal complexes formally named tris-(acetylacetonato)chromium(III). Literature procedures were refined and corrected for the syntheses of each of these complexes. Through the process of recrystallization, well-defined crystal structures were collected for Cr(acac)3, Cr(acac-Cln)3, and Cr(acac-Brn)3 where acac = acetylacetonato, Cl = chlorine, and Br = bromine. UV-visible and cryogenic luminescence spectra at 77 K were measured for each of these complexes. UV-visible spectral analysis confirmed the identity of Cr(acac)3, Cr(acac-Cln), and Cr(acac-Brn), and luminescence allowed for quantitative determinations of the 0-0 transition energy and fundamental frequency of the breathing vibrations, which do not currently appear in the scientific literature. Bimetallic chromium(III) complexes were synthesized to have hydroxy and methoxy bridging ligands to connect the two chromium(III) metals.
Synthesis and Spectroscopic Characterization of Chromium Acetylacetonato Complexes
C327
Multiple syntheses were carried out to prepare a series a chromium(III) transition metal complexes formally named tris-(acetylacetonato)chromium(III). Literature procedures were refined and corrected for the syntheses of each of these complexes. Through the process of recrystallization, well-defined crystal structures were collected for Cr(acac)3, Cr(acac-Cln)3, and Cr(acac-Brn)3 where acac = acetylacetonato, Cl = chlorine, and Br = bromine. UV-visible and cryogenic luminescence spectra at 77 K were measured for each of these complexes. UV-visible spectral analysis confirmed the identity of Cr(acac)3, Cr(acac-Cln), and Cr(acac-Brn), and luminescence allowed for quantitative determinations of the 0-0 transition energy and fundamental frequency of the breathing vibrations, which do not currently appear in the scientific literature. Bimetallic chromium(III) complexes were synthesized to have hydroxy and methoxy bridging ligands to connect the two chromium(III) metals.