Particular features of incorporation of coumarin 30 into nanoparticles from metal complexes and the intensity of its columinescence

• Published in: Optics and spectroscopy Vol. 113; no. 2; pp. 115 - 125
• Main Authors: Sveshnikova, E. B., Dudar’, S. S., Mironov, L. Yu, Ermolaev, V. L.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01-08-2012
• Subjects: Condensed-Matter Spectroscopy; Lasers; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Concentration Quenching; Phen; Fluorescence Quantum Yield; Nile Blue; Coumarin
• ISSN: 0030-400X; 1562-6911
• DOI: 10.1134/S0030400X1208019X

We have studied the sensitized fluorescence of coumarin 30 incorporated into nanoparticles from complexes of
p
-phenylbenzoyltrifluoroacetone and 1,10-phenanthroline with Y, La, Lu, Gd, Al, and Sc ions in 10% alcoholic-aqueous solutions. We have shown that, upon formation of nanoparticles from complexes of Y(III) and Ln(III) ions, coumarin 30 molecules are completely incorporated from the solution into nanoparticles from complexes up to dye concentrations in the solution comparable with the concentration complexes. For the nanoparticles under study, in the whole range of the examined dye concentrations, concentration quenching of the coumarin 30 cofluorescence has not been observed. Our results show that coumarin 30 is incorporated into lanthanide and yttrium complexes as a synergistic bidentate ligand. The possibility of creating brightly luminescent markers that absorb not only in the range of 360–370 nm, but also in the range of 440–450 nm, and have a narrow fluorescence spectrum with λ
max
= 520 nm has been demonstrated.