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The newly synthesized Eu and Yb complexes with the new carbazole-based ligands CPAD and CPAP display the characteristic long-lived metal-centered emission upon one- and two-photon excitation. The Eu complexes show the expected narrow emission bands in the red region, with emission lifetimes between 0.382 and 1.464 ms and quantum yields between 2.7% and 35.8%, while the Yb complexes show the expected emission in the NIR region, with emission lifetimes between 0.52 and 37.86 μs and quantum yields between 0.028% and 1.12%. Two-photon absorption cross sections (σ) as high as 857 GM were measured for the two ligands. The complexes showed a strong dependence of the one- and two-photon sensitized emission intensity on solvent viscosity in the range of 0.5-200 cP in the visible and NIR region.
This article was published in the following journal.
Name: Inorganic chemistry
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A noninvasive method for assessing BODY COMPOSITION. It is based on the differential absorption of X-RAYS (or GAMMA RAYS) by different tissues such as bone, fat and other soft tissues. The source of (X-ray or gamma-ray) photon beam is generated either from radioisotopes such as GADOLINIUM 153, IODINE 125, or Americanium 241 which emit GAMMA RAYS in the appropriate range; or from an X-ray tube which produces X-RAYS in the desired range. It is primarily used for quantitating BONE MINERAL CONTENT, especially for the diagnosis of OSTEOPOROSIS, and also in measuring BONE MINERALIZATION.
Techniques using light resulting from PHYSICAL LUMINESCENCE emitted by LUMINESCENT PROTEINS and LUMINESCENT AGENTS.
Compound such as LUMINESCENT PROTEINS that cause or emit light (PHYSICAL LUMINESCENCE).
Measurement of light resulting from PHYSICAL CHEMILUMINESCENCE such as from LUMINESCENT PROTEINS and LUMINESCENT AGENTS.
Emission of LIGHT when ELECTRONS return to the electronic ground state from an excited state and lose the energy as PHOTONS. It is sometimes called cool light in contrast to INCANDESCENCE. LUMINESCENT MEASUREMENTS take advantage of this type of light emitted from LUMINESCENT AGENTS.
Multiple Sclerosis MS
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