Sensitised luminescence in lanthanide containing arrays and d–f hybrids

Abstract

Sensitised luminescence from lanthanide complexes offers many potential advantages in imaging and assay, particularly when coupled with time-gating protocols that can be used to gate out background signal. In this perspective, we discuss the routes by which lanthanide arrays and polymetallic d-f hybrids can be prepared by conventional synthesis and self-assembly, and discuss and evaluate the possibilities for exploiting and evaluating the intermediates in the sensitisation process, with particular emphasis on the mechanisms of energy transfer.

Advances in Rare Earth Spectroscopy and Applications

“…134 Parker et al 135 reported the emission intensity variation of Eu ions as a function of halide ions (Cl, Br, I) in aqueous solution of Euoctadentate monoamindetriphosphinate or chiral tetraamide complex, which was attributed to the competition between the excited-state quenching rate of the chromophore and the rate of intersystem crossing from triplet state of the chromophore to the 4f level of Eu ion. Faulkner et al 136 showed the selective stabilization of a more luminescent bound form to give an intense near-infrared Yb 3+ luminescence on addition of SCN − ion in a dendrimer complex. Wang et al 137 found that the phenanthroline-based imidazole Euor Tb-complexes can efficiently detect different anions (F − , CH 3 COO − , and HSO 139 in different Eu-tripodes complexs bearing quinoline chromophores.…”

Coordination chemistry of amide-functionalised tetraazamacrocycles: structural, relaxometric and cytotoxicity studies

“…All 1 H NMR spectra were recorded as solutions in specified deuterated solvents on a Bruker 2 channel DRX-400 spectrometer using the residual protic solvent signal as internal reference. 13 C NMR spectra were recorded on a Bruker 2 channel DRX-400 spectrometer as solutions in specified deuterated solvents. FT-IR spectra were recorded on a Perkin-Elmer Spectrum RX FT-IR spectrometer with built-in internal calibration.…”

Near Infrared (NIR) Lanthanide Emissive Langmuir–Blodgett Monolayers Formed Using Nd(III) Directed Self-Assembly Synthesis of Chiral Amphiphilic Ligands

“…[12][13][14][15] In particular, the high density of states in the excited state manifolds of Nd III and Er III ensures that non-radiative quenching of the lanthanide emissive state by associated C-H and O-H oscillators is more important in complexes with these ions than any other lanthanides, as they are quenched to a greater extent through closely associated C-H oscillators (in addition to N-H and O-H oscillators). 2,12,[15][16][17] As well as introducing a strong dependence of luminescence quantum yield and lifetime upon structure, this phenomenon also means that ternary assemblies, involving guests such as biomolecules and complexes, will change the luminescence quantum yields of such species. [18][19][20] Such assemblies have already been widely exploited in systems where inner sphere solvation is changed when the assembly is formed; 21,22 however, there is also clear potential to exploit the more subtle effects inherent to the presence of local oscillators in lifetime resolved imaging.…”