Health & Environmental Research Online (HERO)


Print Feedback Export to File
7624772 
Journal Article 
Recent advances in instrumentation for absolute emission quantum yield measurements 
Ishida, H; Tobita, S; Hasegawa, Y; Katoh, R; Nozaki, K; , 
2010 
Yes 
Coordination Chemistry Reviews
ISSN: 0010-8545 
ELSEVIER SCIENCE SA 
LAUSANNE 
2449-2458 
WOS:000282389100002 
The fluorescence and phosphorescence quantum yields (Phi) of standard solutions have been re-evaluated based on an absolute method using an integrating sphere equipped with a multichannel spectrometer. We have examined in detail the Phi value of ruthenium(II) tris(2,2'-bipyridine) complex which have been often used as the standards in the determination of quantum yields of transition-metal complexes. This revealed that the Phi values for [Ru(bpy)(3)](2+) were 0.063 in deaerated H2O, 0.040 in aerated H2O, 0.095 in deaerated CH3CN. and 0.018 in aerated CH3CN, respectively, which are significantly higher than the previously accepted values.We have also examined the technical aspects in the determination of absolute emission quantum yields for lanthanide complexes and those of organic crystals of anthracene. For the accurate determination for lanthanide complexes, special care must be taken in the spectroscopic measurements because of their narrow absorption and emission bands. For organic crystals, the fluorescence quantum yields are reduced due to reabsorption, chemical impurities and structural defects. Our observations for highly purified anthracene crystals revealed that the lower limit value of Phi was 0.64. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved. 
18th International Symposium on the Photochemistry and Photophysics of Coordination Compounds (ISPPCC) 
Sapporo, JAPAN