X-Ray-excited luminescence of organic gadolinium compounds

✍ Scribed by G. Blasse; L. H. Brixner

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 406 KB
• Volume: 109
• Category: Article
• ISSN: 0165-0513
• DOI: 10.1002/recl.19901090307

✦ Synopsis

Abstract

The X‐ray excited emission spectra of gadolinium acetate tetrahydrate, [Gd ⊂ 2.2.1]Cl~3~·2H~2~O and Gd[C~3~F~7~COCHCOC(CH~3~)~3~]~3~ (or Gd[FOD~3~), are reported. The first two compounds show strong Gd^3+^ emission (^6^P←^8^S) at room temperature, while the third compound gives rise to strong ligand emission, but only at very low temperature. Eu(FOD)~3~, however, shows intense Eu^3+^ emission upon X‐ray excitation. The Gd^3+^ emission spectra show many vibronic lines and, although their intensity is weak, it is much higher than generally accepted. These vibronic lines indicate which groups coordinate the Gd^3+^ ion and it is shown that their intensity increase as the ligand polarizability increases.