Highly near-IR emissive ytterbium(iii) complexes with unprecedented quantum yields.

ABSTRACT: The design of highly near-infrared (NIR) emissive lanthanide (Ln) complexes is challenging, owing to the lack of molecular systems with a high sensitization efficiency and the difficulty of achieving a large intrinsic quantum yield. Previous studies have reported success in optimizing individual factors and achieving high overall quantum yields, with the best yield being 12% for Yb(iii). Herein we report a series of highly NIR emissive Yb complexes, in which the Yb is sandwiched between an octafluorinated porphyrinate antenna ligand and a deuterated Kläui ligand, which allowed optimization of two factors in the same system, and one of the complexes had an unprecedented quantum yield of 63% (estimated uncertainty 15%) in CD₂Cl₂ with a long lifetime (τ_obs

SUBMITTER: Hu JY 

PROVIDER: S-EPMC5480304 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature