Abstract: A low-cut sock having a heel cuff that is completely covered by a heel collar of a low quarter shoe.

Abstract: Lanthanide (III) ion complexing compound comprising: (1) a sensitizer moiety of formula (I) in which: a is an integer from 1 to 4; b is an integer equal 1 or 2; c is an integer equal to 1 or 2; (R1)a, (R2)b, (R3)c are the same or different and are chosen from the group consisting of: H; alkyl; —COOR4 where R4 is H or an alkyl; aryl; heteroaryl; saturated or unsaturated cyclic hydrocarbon; CF3; CN; a halogen atom; L-Rg; L-Sc; or two consecutive R3, two consecutive R2 or two consecutive R1 groups together form an aryl or a heteroaryl group or a saturated or unsaturated cyclic hydrocarbon group; where L is a linker, Rg is a reactive group and Sc is a conjugated substance; X1 and X2 are the same or different and are O or S; A is either a direct bond or a divalent group chosen from —CH2— or —(CH2)2—, said moiety being covalently attached to (2) a lanthanide (III) ion chelating moiety through A. Application: Preparation of luminescent lanthanide (III) ion complexes and use thereof as fluorescent labels.