| Abstract
| - Nanosized lanthanide clusters were synthesized using sulfonylcalix[4]arene, which behaves as an antenna for UV and near-UV light, as a cluster-forming ligand. The resulting clusters have conformationally controlled luminescent properties.
- Dinuclear and cubane-shaped lanthanide cluster complexescontaining EuIII and TbIII were synthesized by step-by-stepconstruction using p-tert-butylsulfonylcalix[4]arene as a cluster-forming ligand. The sulfonylcalixarene adopts a pinched-coneconformation in the dinuclear complexes and a cone conformationin the cubane complexes. Because the calixarene has a largeπ-conjugate system expanding over the entire molecule, it behavesas a good antenna chromophore for UV and near-UV light, and aslight conformational change of the calixarene (from cone topinched-cone and vice versa) has an effect on the energy levelsof excited S1 and T1 states. As a result, selectivity is observed inthe luminescent properties of dinuclear and cubane-shaped systemsof EuIII and TbIII.
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