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Divalent Eu 2+ ion – an effective inorganic mediator of energy transfer from the primary chemiluminescence emitter 3 Me 2 CHC(H)=O* on Tb 3+ and Ru(bpy) 3 2+ ions
Author(s) -
Galimov D.I.,
Yakupova S.M.,
Bulgakov R.G.
Publication year - 2018
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3554
Subject(s) - chemistry , ion , phosphor , excited state , divalent , europium , analytical chemistry (journal) , chemiluminescence , inorganic chemistry , materials science , physics , optoelectronics , organic chemistry , chromatography , nuclear physics
This study demonstrated for the first time that chemiluminescence (CL) from oxidation of Bu i 2 AlH (Bu = C 4 H 9 ) using oxygen from tetrahydrofuran (THF) was significantly enhanced by the addition of Ru(bpy) 3 2+ . A quantitative comparison of the enhancement efficiency of this CL was performed by addition of ionic phosphors Eu 2+ , Tb 3+ and Ru(bpy) 3 2+ . CL enhancement was caused by energy transfer from the primary CL emitter ( 3 Me 2 CHC(H)=O* aldehyde) to these ionic phosphors. The CL efficiency enhancement was in the order: Eu 2+ (8.9 × 10 6 ) > Tb 3+ (100) > Ru(bpy) 3 2+ (50). The enhanced CL emitters were excited ions: Eu 2+ *, λ max = 465 nm; Tb 3+ *, λ max = 485, 542, 625 nm; and Ru(bpy) 3 2+ *, λ max = 567 nm. When two ions Eu 2+ –Tb 3+ or Eu 2+ –Ru(bpy) 3 2+ were present in the reaction solution, the efficiency of CL enhancement by Tb 3+ or Ru(bpy) 3 2+ ions was much higher, being 1.2 × 10 6 and 4.2 × 10 4 , respectively. In this case, two excited ions were simultaneously registered as CL emitters: Eu 2+ * and Tb 3+ * or Eu 2+ * and Ru(bpy) 3 2+ *. Emission intensity of the Eu 2+ * ion in these emitter doublets is much lower than when only one Eu 2+ ion is present in solution.