Near-infrared emission luminescence

VicinelU, V, Ceroni, R, Maestri, M., etal. (2002) Luminescent lanthanide ions hosted in a fluorescent polylysin dendrimer. Antenna-Uke sensitization of visible and near-infrared emission. Journal of the American Chemical Society, 124, 6461. 

Ronson, T.K., Lazarides, T., Adams, H., et al. (2006) Luminescent PtII(bipyridyl)(diacetylide) chromophores with pendant binding sites as energy donors for sensitised near-infrared emission from lanthanides structures and photophysics of PtII/LnIII assembhes. Chemistry - A European Journal, 12, 9299. 

Under excitation of a 980 nm laser diode, a dazzling green spot from both samples could be clearly seen by the naked eye. Figure 3 gives the typical upconversion luminescent emission bands. Green and near-infrared emission bands were detected in both samples, which were very similar to fluorescent emissions. Especially, the red emission band was measured around 667 nm associated with the F5—> lg transition. Furthermore, the ultra-violet and blue upconversion emissions can also be measured. The ultra-violet emissions in the ranges of 381-394 nm and 409-428 nm are assigned to the G4—> lg and G5— Ig transitions, respectively. The blue emission between 473 and 500 nm... 

Mudring, Binnemans, and Giemoth further collaborated to study the other two near-infrared luminescent anhydrous rare earth (Nd ", Er " ) iodides in ionic liquid 1 -dodecyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [Ci2mim] [Tf2N] [24]. Both of the two systems show the intense near-infrared emission for Nd " and Er ". For Nd " system, three transitions can be observed between 750 and 1450 nm ... 

Luminescence can be defined as the emission of light (intended in the broader sense of ultraviolet, visible, or near infrared radiation) by electronic excited states of atoms or molecules. Luminescence is an important phenomenon from a basic viewpoint (e.g., for monitoring excited state behavior) [1] as well as for applications (lasers, displays, sensors, etc.) [2,3]. 

The lower energy luminescence of Os(II) complexes relative to the corresponding Ru(II) complexes has led to a number of studies seeking complexes that absorb throughout the visible (black chromophores) and have emissive excited states in the near-infrared. Kol and Barigelletti reported the photophysical properties of Os(II) complexes of eilatin (eil, Scheme 1) and isoeilatin (ieil) bis-phenanthroline derivatives. The eil com-... 

The synthesis and near-infrared photoluminescence of [Os(bpy)2(3,8-diarylethynyl-l,10-phenanthroline)]2+ complexes (AEphen A = methoxy-phenyl, biphenyl, nitrophenyl) have recently been reported. These phenan-throline complexes exhibit emission in the 790-830 nm region. The nitro-phenylethynyl derivative exhibits no room temperature luminescence, presumably because of intramolecular electron transfer quenching [22],... 

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