Extending lifetimes of lanthanide-based near-infrared emitters (Nd, Yb) in the millisecond range through Cr(III) sensitization in discrete bimetallic edifices.
A [Cr(alpha,alpha'-diimine)3]3+ chromophore is used as a donor for sensitizing NdIII and YbIII near-infrared (NIR) emitters in the heterobimetallic helicates [LnCrIIIL3]6+. The intramolecular CrIII --> LnIII energy transfer process controls the population of the lanthanide-centered emitting levels, thus leading to unprecedented extension of the NIR luminescence decay times in the millisecond range for Nd and Yb ions incorporated in coordination complexes.
Imbert
Daniel
D
Institute of Molecular and Biological Chemistry, Swiss Federal Institute of Technology, BCH 1402, 1015 Lausanne, Switzerland.
Cantuel
Martine
M
Bünzli
Jean-Claude G
JC
Bernardinelli
Gérald
G
Piguet
Claude
C
D002857:Chromium / Q000737:chemistry*; D007700:Kinetics; D008958:Models, Molecular; D009354:Neodymium / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D019265:Spectroscopy, Near-Infrared / Q000379:methods; D013816:Thermodynamics; D015018:Ytterbium / Q000737:chemistry*
D009942:Organometallic Compounds; D002857:Chromium; D009354:Neodymium; D015018:Ytterbium