Photophysical investigation of near infrared emitting lanthanoid complexes incorporating tris(2-naphthoyl)methane as a new antenna ligand

Dalton Transactions : an International Journal of Inorganic Chemistry
Laura Abad GalánMassimiliano Massi

Abstract

A conjugated β-triketone, tris(2-naphthoyl)methane (tnmH), has been synthesized and successfully utilized as an antenna moiety for sensitization of the trivalent lanthanoids Eu3+, Sm3+, Yb3+ and Nd3+, in an isomorphous series of mononuclear complexes formulated as [Ln(tnm)3(DMSO)2] (Ln3+ = Nd3+, Sm3+, Eu3+, Gd3+ and Yb3+). The photophysical properties of the materials were characterized as comprehensively as possible, with overall quantum yields, intrinsic quantum yields based on calculated radiative decays, and sensitization efficiencies reported. This investigation improves understanding of the sensitization processes occurring in the near-infrared (NIR) region, where quantitative data are currently scarce. In fact, the [Yb(tnm)3(DMSO)2] and its deuterated analogue, [Yb(tnm)3(d6-DMSO)2], present high values of overall quantum yield of 4% and 6%, respectively, which makes them useful and readily accessible references for future investigation of NIR-emitting systems.

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Jun 2, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Laura Abad GalánMassimiliano Massi
Aug 18, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Laura Abad GalánMassimiliano Massi
Dec 1, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Laura Abad GalánMassimiliano Massi

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Methods Mentioned

BETA
NMR
X-ray

Software Mentioned

2014
Bruker TopSpin
SHELX

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