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Phase Resolution Method of PA Spectra in Copper(II)‐EDTA Complexes
Author(s) -
Yugeng Zhang,
Guiwen Zhao
Publication year - 1993
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170280518
Subject(s) - spectral line , absorption spectroscopy , copper , chemistry , analytical chemistry (journal) , relaxation (psychology) , absorption (acoustics) , phase (matter) , atomic physics , materials science , optics , physics , psychology , social psychology , organic chemistry , chromatography , astronomy , composite material
The complexes crystals of Cu(H 2 EDTA) · H 2 O and CaCu(EDTA) · 4 H 2 O were synthesized and their photoacoustic spectra were determined in the region of 300–800 nm at room temperature. A method used to directly monitor both position and strength of the absorption bands of respective electronic states were proposed. With the amplifier and phase spectra all absorption peaks of different electronic states could be distinguished. The PA spectra were also explained by the 3d orbit radial scaling theory. All the d‐d transition absorption peaks calculated are in good agreement with the experimental values. In addition, the non‐radiative relaxation process and the relaxation time of excitation electron were discussed with the PA spectra.