Antiquenching effect of lanthanide .beta.-diketonate complexes on the photoluminescence of quantum-confined cadmium sulfide clusters

Titration of quantum-confined (Q-sized) CdS clusters in inverse micelle solutions with dilute lanthanide {beta}-diketonate (Ln(fod){sub 3}, Ln = Pr, Dy, Gd, Ho, Yb; fod = 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionato) complexes yields an enhancement in CdS photoluminescence (PL) ranging f...

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Veröffentlicht in:	Journal of physical chemistry (1952) 1991, Vol.95 (1), p.4-6
Hauptverfasser:	Chandler, Robin R, Coffer, Jeffery L
Format:	Artikel
Sprache:	eng
Schlagworte:	360603 - Materials- Properties ADSORPTION ISOTHERMS CADMIUM COMPOUNDS CADMIUM SULFIDES CHALCOGENIDES Condensed matter: electronic structure, electrical, magnetic, and optical properties DATA DYSPROSIUM ELEMENTS Exact sciences and technology EXPERIMENTAL DATA GADOLINIUM HOLMIUM INFORMATION INORGANIC PHOSPHORS ISOTHERMS KETONES LUMINESCENCE MATERIALS SCIENCE MEASURING METHODS METALS MICELLAR SYSTEMS NUMERICAL DATA Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation ORGANIC COMPOUNDS PHOSPHORS PHOTOLUMINESCENCE Physics PRASEODYMIUM RARE EARTHS SULFIDES SULFUR COMPOUNDS YTTERBIUM
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Zusammenfassung:	Titration of quantum-confined (Q-sized) CdS clusters in inverse micelle solutions with dilute lanthanide {beta}-diketonate (Ln(fod){sub 3}, Ln = Pr, Dy, Gd, Ho, Yb; fod = 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionato) complexes yields an enhancement in CdS photoluminescence (PL) ranging from 69% to 240%. The optimal magnitude of this antiquenching effect is dependent on the spectral characteristics of the parent Q-CdS cluster. The observed changes in PL areas clearly fit a Langmuir adsorption isotherm from which an average adduct formation constant (log K{sub f}) of 4.71 is determined, irrespective of choice of the lanthanide ion.
ISSN:	0022-3654 1541-5740
DOI:	10.1021/j100154a002