Lanthanides photoluminescence

Andohna CM, Holthoff WG, Page PM, Mathews RA, Morrow JR, Bright FV. Spectroscopic system for direct lanthanide photoluminescence spectroscopy with nanomolar detection limits. Appl Spectrosc. 2009 63(5) 483 93. 

Haase and co-workers have extensively studied the synthesis of high-quantum-yield nanophosphors such as Eu-, Tb- or Er-doped lanthanide phosphates (Riwotzki et al., 2000, 2001 Lehmann et al., 2004 Kompe et al., 2003 Lehmann et al., 2003). For example, the photoluminescence (PL) quantum yield of the CePO Tb core nanocrystals (4-6 nm) diluted... 

One of the advantages of lanthanide-doped semiconductor nanocrystals is that lanthanide luminescence can be efficiently sensitized by exciton recombination in the nanocrystals. The photoluminescence efficiency of Er3+ in Si nanocrystals in Si02 increases by more than five... 

Simple silica matrices To further illustrate the limit of this chapter, we briefly discuss one type of materials that will not be systematically reviewed layered lanthanide silicates obtained by hydrothermal synthesis. An alkaline solution of sodium silicate and lanthanide chlorides was stirred to produce a gel which was subsequently put into an autoclave under pressure at 230 °C during seven days, a procedure during which lamellar photoluminescent silicates... 

Figure 2.28 An ORTEP view of the crystal structure of Eu(L )3(TPTZ) with partial atomic labeling. Thermal ellipsoids are drawn at the 50% probability level [25]. (Reprinted from Polyhedron, 26, C.R. De Silvaa, J.R. Maeyera, A. Dawsona and Z. Zheng, Adducts of lanthanide [l-diketonates with 2,4,6-tri(2-pyridyl)-l,3,5-triazine synthesis, structural characterization, and photoluminescence studies, 1229-1238, 2007, with permission from Elsevier.)...

Van Deun, R., Nockemann, R, Parac-Vogt, T.N., et al. (2007) Near-infrared photoluminescence of lanthanide complexes containing the hemicyanine chromophore. Polyhedron, 26, 5441-5447. 

To be a good emitting material for use in OLEDs, firstly the lanthanide complex must have high photoluminescent efficiency, which is one of the essentials for excellent electroluminescence devices. As noted above, the external quantum efficiency hext of an OLED can be expressed as hext = hr other conditions are kept unchanged, the higher the photoluminescent efficiency, the better the electroluminescence performance. 

Wong, W.-K., Zhu, X., and Wong, W.-Y. (2007) Synthesis, structure, reactivity and photoluminescence of lanthanide(lll) monoporphyrinate complexes. Coordination Chemical Reviews, 251, 2386. 

He, H.,Zhu, X., Hou, A., eta/. (2004) Reactivity of aqua coordinated monoporphyrinate lanthanide complexes synthetic, structural and photoluminescent studies of lanthanide porphyrinate dimmers. Dalton Transactions, 4064. 

He, H., Guo, J., Zhao, Z., et al. (2004) Synthesis, characterization and near-infrared photoluminescence of monoporphyrinate lanthanide complexes containing an anionic tripodal ligand. European Journal cf Inorganic Chemistry, 837. 

Sun XQ, Peng B, Ji Y et al (2008) Ionic liquids based all-in-one synthesis and photoluminescence properties of lanthanide fluorides. J Phys Chem C 112 10083-10088... 

Our recent investigations demonstrated that sol-gel films doped with lanthanides allows strong enhancement of photoluminescence (PL) when fabricated in porous anodic alumina (PAA) [6]. In the present paper, we report on investigations of Eu- and Tb-doped In203 and Sn02 sol-gel-derived films fabricated in PAA in view of an application in EL devices. 

The paper summarizes recently investigated properties of a structure microporous xerogel/mesoporous anodic alumina , doped with erbium, terbium and europium. An enhancement of green, red and infiared photoluminescence (PL) from the structure associated with intra-transitions of bivalent lanthanides in xerogels is discussed. 

Acid-oxidized SWCNTs were also reacted with lanthanide salts containing Eu, La, and Tb [88], In this study it was found that the lanthanide ions were linked to CNTs through the surface oxygen atoms, forming predominantly ionic arrangements, and thus the oxidized nanotubes acted as primary ligands for these metal ions. The adducts were analyzed using spectroscopic techniques (ETIR, Raman, and photoluminescence) and were characterized structurally by AEM and TEM. 

Synthesis, structure, reactivity, and photoluminescence of lanthanide(III) monoporphyrinate complexes 07CCR2386. 

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