Infrared luminescence properties

Song, L., Wang, Q., Tang, D., etal. (2007) Crystal structure and near-infrared luminescence properties of novel binuclear erbium and erbium-ytterbium cocrystalline complexes. New Journal of Chemistry, 31, 506. 

A number of systematic structural analyses have been described for families of saturated oxazolones. First, as mentioned previously, detailed smdies of NMR long-range coupling in 2,4-disubstimted-5(47/)-oxazolones and in 5(27/)-oxazo-lones have been reported." Similarly, detailed NMR studies of the kinetics of racemization of 2,4-disubstimted-5(47/)-oxazolones have been performed. A theoretical study of the spectral-luminescence properties of some 4-alkyl-2-phenyl-5(47/)-oxazolones has been reported and an investigation of the infrared (IR) and Raman spectra of 5(4//)-oxazolones, particularly of the carbonyl group vibration, has been reported. Electron impact mass spectra of saturated 5(47/)-oxazolones have been published. More recently this technique has been used to distinguish between the stereoisomers of some spirocyclopropane oxazolones 352 (Fig. 7.36). Finally, several studies of the HPLC behavior of 5(47/)-oxazolones complete a general view for this family of compounds. " " ... 

Davies, GM., Pope, S.J.A., Adams, H., etal. (2005) Structural and photophysical properties of coordination networks combining [Ru(bipy)(CN)4 ] - anions and lanthanide(lll) cations rates of photoinduced Ru-to-lanthanide energy transfer and sensitized near-infrared luminescence. Inorganic Chemistry, 44, 4656. 

Baca, S.G, Adams, H., Sykes, D., et al. (2007) Three-component coordination networks based on [Ru(phen)(CN)4] anions, near-infrared luminescent lanthanide(lll) cations, and ancillary oligopyridine ligands structures and photophysical properties. Dalton Transactions, 2419. 

Van Deun et al. were the first to observe near-infrared luminescence from lanthanide-doped liquid crystal mixtures They studied the spectroscopic properties of the lanthanide(III) / -diketonate complexes [L (dbm)3(phen)], where Ln = neodymium, erbium, ytterbium, and dbm is dibenzoylmethane, in the liquid crystal MBBA. By incorporation of an erbium(III)-doped nematic liquid crystal (ErCls dissolved in E7) in the pores of microporous silicon, narrowing of the erbium(III) emission band in the near-infrared was observedJ Luminescent optically active liquid crystals were obtained by doping [Eu(tta)3-3H20] into a mixture of cho-lesteryl nonanoate, cholesteryl tetradecanoate and the ternary liquid crystal mixture ZLI1083 from MerckJ ... 

Detecting luminescence in the near-inffared region (700-900 nm) is advantageous as there is minimal absorption by other biomolecules. Thus, a near-infrared chemiluminescent probe should be important as a reporter molecule for many analytical applications. Herein, I present the synthesis and luminescence properties of chemiluminescent probes that emit the near-infrared light by reaction with superoxide anions. 

Herrera JM, Pope SJA, Adams H, Faulkner S, Ward MD (2006) Structural and photophysical properties of coordination networks combining [Ru(bpym)(CN)4] or [ Ru(CN)4-2(p-bpym)] " anions (bpym=2, -bipyrimidine) with lanthanide(III) cations Sensitized near-infrared luminescence from Yb(III), Nd(III), and Er(III) following Ru-to-lanthanide energy transfer. Inorg Chem 45 3895-3904... 

In this part, single activator-doped systems with multicolor emission are briefly introduced. The luminescent properties of a phosphor are basically determined by the host stmcture and the characteristics of the activator. Rare-earth ions and some transitional-metal ions are usually used as activators of phosphor. The energy-level spectra of some rare-earth ions, such as Eu ", Pr , Tb ", and Dy " contain several metastable multiplets that can offer the possibility of simultaneous emission in the blue, green, orange, red, and infrared wavelengths in different crystalline hosts. In turn, these are strongly affected by the host lattice (phonon frequency as well as the crystal stmcture), and the concentration of the activators decide the different color-emission intensities from 4 -4C transitions. The emissions of other rare-earth ions with —> / transition (Eu ", Ce " ), including transitional metal ions with... 

Zhao S, Huang Y, Shi M et al (2010) Chemiluminescence resonance energy transfer-based detection for microchip electrophoresis. Anal Chem 82 2036-2041 Naruke H, Mori T, Yamase T (2009) Luminescence properties and excitation process of a near-infrared to visible up-conversion color-tunable phosphor. Opt Mater 31 1483-1487 Wang X, Li YD (2007) Monodisperse nanocrystals general synthesis, assembly, and their applications. Chem Commun 2901-2910... 

Matsui K., Momose F. Luminescence properties of tris(2,2 -bipyridine)ruthenium(II) in sol-gel systems of Si02. Chem. Mater. 1997 9 2588-2591 Matsui K., Nozawa K. Molecular probing for the microenvironment ofphotonics materials prepared by the sol-gel process. Bull. Chem. Soc. Jpn. 1997 70 2331-2335 Matsui K., Yamamoto T., Goto T., Nozawa K., Bessho K. Fluorescence and infrared spectra of phenyl-modified silica gels prepared by the sol-gel process. J. Chem. Soc. Jpn. 1998 489-494 Matsui K., Nozawa K., Yoshida T. Phosphorescence of benzophenone in sol-gel silica. Bull. Chem. Soc. Jpn. 1999 72 591-596... 

Tronto, J Ribeiro, S.J.L., Valim, J.B., and Gonsalves, R.R. (2009) Visible and near-infrared luminescent Eu or Er " doped laponite derived xerogels and thick films structural and spectroscopic properties. Mater. Chem. Phys., 113 U), 71-77. 

Lanthanide p-diketonates are amongst the best smdied rare-earth luminescent complexes [58]. They are brightly luminescent and volatile so that incorporation into various electroluminescent materials is simple. Moreover their photophysical properties are easily tuned by a judicious choice of ancillary ligands. Indeed, conventional synthesis usually yields bis(hydrated) lanthanide tris(P-diketonates), but the two solvent molecules can be substituted by either a fourth diketonate anion or a donor ligand with adequate functionalisation as to provide convenient light harvesting and subsequent energy transfer onto the metal ion. It is noteworthy that not only visible but also near-infrared luminescence [59,60] is efficiently sensitised in lanthanide p-diketonates. In the case of Eu , some ternary complexes have quantum yields up to 85% [8] and the main asset of their luminescent properties is an emission essentially concentrated in the hypersensitive Dq transition... 

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