title: Photoacoustic phase study on the frequency dependence of phase angle and triplet state lifetime of Nd(III)-acetylacetonate.
abstract: The amplitude and phase of the photoacoustic (PA) signal generated in the rare earth complex powder of Nd(III)-acetylacetonate (Nd(AA)3) were examined. By using the reasonably simplified formula about phase angle at the wavelengths assigned to pi-pi* transition of ligand and f-f transitions of Nd3+, the instrumental contribution to phase angle at different chopping frequency was calculated. The frequency dependence of sample phase angle, the relative phase angle shift caused by instrumental factors and the calculation of triplet state lifetime of sample under study were also discussed. Being independent of sample, the instrumental contribution to phase angle was regarded as a parameter representing the situations of instruments and measurement and it became an approach to calculate the relaxation time of ligand in rare earth complex.
authors.affiliation: Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Bin
authors.initials: B
authors.lastname: Hu
authors.forename: Da
authors.initials: D
authors.lastname: Chen
authors.forename: Qingde
authors.initials: Q
authors.lastname: Su
mesh_terms: D000162:Acoustics; D006885:Hydroxybutyrates / Q000737:chemistry*; D009354:Neodymium / Q000737:chemistry*; D010422:Pentanones / Q000737:chemistry*; D010777:Photochemistry; D013057:Spectrum Analysis
chemical_list: D006885:Hydroxybutyrates; D010422:Pentanones; C049529:acetyl acetonate; D009354:Neodymium