Splitting of the near infrared absorption bands of Sm in POCl3:SnCl4, POCl3:ZrCl4 and POCl3:TiCl4 |
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Authors: | J Chrysochoos P Tokousbalides |
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Institution: | Department of Chemistry, University of Toledo, Toledo, Ohio 43606, USA |
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Abstract: | The near infrared absorption spectra of Sm3+ in POCl3:SnCl4, POCl3:ZrCl4 and POCl3:TiCl4 consist of a series of bands, attributed to the 6H5/2 → 6FJ transitions. Each one of these absorption bands is split into three components. The extent of splitting differs slightly from state to state. For each component of the 6F-multiplet the splitting decreases gradually from POCl3:SnCl4 to POCl3:ZrCl4 and POCl3:TiCl4. Energy differences between adjacent components of the near infrared absorption bands vary from a maximum of 166 cm−1 to a minimum of 123 cm−1. The band half-widths of the corresponding components vary from 86 to 120 cm−1. At lower temperatures the intensity of the high energy component increases whereas the intensity of the entire absorption band envelope, associated with each component of the 6F-multiplet, remains almost constant. The splitting observed is attributed to the Stark splitting of the 6H5/2-state of Sm3+ into three components, in conjunction with appropriate Stark splitting of the states of the 6F-multiplet. |
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