title: Lanthanide complexes with 2-(tosylamino)benzylidene-N-benzoylhydrazone, which exhibit high NIR emission.
abstract: New NIR emitting materials were found among the lanthanide complexes with 2-(tosylamino)benzylidene-N-benzoylhydrazone. Complexes of Nd(3+), Er(3+) and Yb(3+), as well as Eu(3+), Gd(3+) and Lu(3+), were synthesized for the first time. Owing to the absence of vibration quenching the ytterbium complex was found to exhibit a photoluminescence quantum yield of 1.4%. Since the sensitization efficiency was calculated to be 55%, the losses in the quantum yield are probably due to Yb-Yb resonant energy transfer.
authors.affiliation: M. V. Lomonosov Moscow State University, Moscow, Russian Federation. valentina.utochnikova@gmail.com.
authors.forename: V V
authors.initials: VV
authors.lastname: Utochnikova
authors.forename: A D
authors.initials: AD
authors.lastname: Kovalenko
authors.forename: A S
authors.initials: AS
authors.lastname: Burlov
authors.forename: L
authors.initials: L
authors.lastname: Marciniak
authors.forename: I V
authors.initials: IV
authors.lastname: Ananyev
authors.forename: A S
authors.initials: AS
authors.lastname: Kalyakina
authors.forename: N A
authors.initials: NA
authors.lastname: Kurchavov
authors.forename: N P
authors.initials: NP
authors.lastname: Kuzmina
mesh_terms: D001597:Benzylidene Compounds / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D006835:Hydrazones / Q000737:chemistry*; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D049449:Luminescence; D011188:Potassium / Q000737:chemistry
chemical_list: D001597:Benzylidene Compounds; D056831:Coordination Complexes; D006835:Hydrazones; D028581:Lanthanoid Series Elements; D011188:Potassium