Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5403594 | Journal of Luminescence | 2008 | 6 Pages |
Abstract
Two novel complexes of Sm(III) and Dy(III) with mixed oxydiacetate (ODA) and 1,10-phenanthroline (phen) ligands were synthesized and their structure and luminescence properties were characterized. The complexes of [Ln(ODA)(phen)·4H2O]Cl·5H2O [Ln=Sm and Dy] crystallize in the monoclinic space group P21/n with Sm: a=12.3401(14) Ã
, b=16.821(2), c=12.6847(11)Â Ã
, β=107.939(10)°, V=2505.0(5) Ã
3, Z=4 and Ï=1.841Â mg/m3, and with Dy: a=12.289(7)Â Ã
, b=16.805(6)Â Ã
, c=12.705(4)Â Ã
, β=108.144(18)°, V=2493.4(19) Ã
3, Z=4 and Ï=1.786 mg/m3. The complexes of [Sm(ODA)(phen)·4H2O]+ and [Dy(ODA)(phen)·4H2O]+ excited by UV light produce orange red and lightly white emissions, respectively, via the nonradiative energy transfer from phen to the metals. The quantum yield of the sensitized luminescence of [Dy(ODA)(phen)·4H2O]+ (Q=19%) is much greater than that of [Sm(ODA)(phen)·4H2O]+ (Q=1.4%). The luminescence decay times of the complexes were in a few microsecond range and independent of temperature.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Jun-Gill Kang, Tack-Jin Kim, Hee-Jung Kang, Younbong Park, Min-Koo Nah,