Luminescence, Dye Degradation and DNA Binding Properties of a Dinuclear Nona‐Coordinated Y(III) Complex

In this study, a dinuclear nona‐coordinated acetate bridged [Y 2 (μ 3 ‐CH 3 COO) 2 (CH 3 COO) 4 (OH) 4 ]. 4H 2 O ( 1 ) complex was synthesized and its luminescence, dye degradation and DNA binding properties were evaluated. The complex 1 belonged to triclinic crystal system with P‐1 space group and the structure consisted of [Y III 2 (μ 3 ‐OR) 2 (μ‐OR) 4 (OH) 4 ] asymmetric “butterfly” units, where R is the rest of a CH 3 CO 2 group linked together in the form of a loop by alternating anti, anti (μ 3 ‐O 2 CMe) 2 and (μ‐O 2 CMe) 2 units attached with the Y wingtip atoms. Interestingly, the co‐ordination number of each Y atom was nine in crystal 1, which was unprecedented and the oxidation states of both the Y atoms were +3 and confirmed by BVS calculation. The inter‐ and intra‐molecular H‐bonding in the molecule gave rise to a layer type of structure. The luminescence property of the Complex 1 reveals that the emission band arises at 279 nm which indicates the Complex 1 had efficient luminescence activity. The Complex 1 exhibited an exciting performance towards degradation of a model pollutant methylene blue and also showed good DNA‐ binding ability.