Studies in fluorinated β-diketones and related compounds Part VIII. Preparation of some new piperidinium tetrakis rare earth 1,3-diketonates and their fluorescence and infrared spectral studies
The invention relates to an enhancement solution for an assay technology using lanthanide ions or their chelates as labels and dissociative fluorescence enhancement as a tool for detection, wherein said enhancement solution comprises a &bgr;-dietone of formula I
1
wherein R
1
is an aryl, optionally mono- or multi-substituted, and R
2
is a straight or branched alkyl chain with 2 to 9 carbon atoms substituted with four or more fluorine atoms. The invention further relates to a bioaffinity assay using lanthanide ions or their chelates as labels and dissociative fluorescence enhancement as a tool for detection comprising the use of said enhancement solution.