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A Bis(pyridine N‐oxide) Analogue of DOTA: Relaxometric Properties of the GdIII Complex and Efficient Sensitization of Visible and NIR‐Emitting Lanthanide(III) Cations Including PrIII and HoIII

“…The performance of the Yb III ‐ L1 complex in H 2 O, in particular its quantum yield (0.73(1) %), is also worthy of mention. For a long time, the record value of ${Q{{{\rm L}\hfill \atop {\rm Yb}\hfill}}}$ in H 2 O stood at 0.53 % for a Yb III dinuclear complex with a bisazacyclic ligand bound to 1,10‐phenanthroline 45. In 2011, however, a quantum yield of 2.5 % was achieved for an intricate porphyrin‐based Yb III complex linked to Rhodamine B 46.…”

“…Besides, L1 is among the few ligands that have been shown to sensitize the luminescence of both Pr III and Ho III in aqueous solution, and for Yb III the emission quantum yield is among the highest values hitherto reported for this lanthanide ion in aqueous solution 2. 43, 45, 46…”

Lanthanide 8-hydroxyquinoline-based podates with efficient emission in the NIR range

“…With ions such as Nd III and Yb III , the reported quantum yields in water are usually smaller than 0.1%, 2 with, to our knowledge, the only exception of a bimetallic Yb III complex with 1,10-phenanthroline substituted in the 2,9 positions by benzo-azacyclic moieties and having Q L Ln 5 0.53% in water. 9 Our ligand design relies on 1,2-diamino-ethane fitted with four chromophoric 8-hydroxyquinoline chelating arms. It was obtained by coupling 1,1,2,2-tetraaminopropyl-1,2-diaminoethane with 7-carboxy-8-hydroxyquinoline to produce Tox (yield: 32%) which was subsequently sulfonated with oleum to give Tsox (yield: 83%; thereafter (H 4 L) 42 ).…”

Lanthanide–tetrapyrrole complexes: synthesis, redox chemistry, photophysical properties, and photonic applications

“…0.5% and o5 ms in water, respectively. 358 In 2011, Wong et al introduced the first water-soluble monoporphyrinato capped ytterbium(III) complex linked with rhodamine B (Yb-RhB) which showed mitochondria-specific subcellular localization and, at that time, record-high NIR emission quantum yield from Yb III (1% at l ex = 340 nm; 2.5% at l ex = 430 nm; both in water) (Fig. 23).…”