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Luminescence

Luminescence.

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Luminescence

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  1. Luminescence This slide show was created by Vivian Ezeh, Colgate University (vezeh@colgate.edu) and posted on VIPEr (www.ionicviper.org) on Aug 18, 2014. This work is licensed under the Creative Commons Attribution Non-commercial Share Alike License. To view a copy of this license visit http://creativecommons.org/about/license/.

  2. Luminescence The emission of light from the excited state of a substance Insert Jablonski diagram from http://www.shsu.edu/chm_tgc/chemilumdir/JABLONSKI.html Application of Luminescence Medical Diagnostics, Flow cytometry, Forensics, Phosphors, Glow toys, Chemical reactions etc.

  3. Fluorescence – Quantum Dots Nano-sized semiconductors (Q-dots) exhibit intense fluorescence properties. Examples include CdS, CdSe, InP, InAs, ZnS, PbSe. The emission wavelength of Qdots depends on the size of the particle. The larger the size the longer the emission wavelength. Insert figure 20.1 from: Lakowicz, J. R., Principle of Fluorescence Spectroscopy. Kluwer Academic/Plenum: 2006; p 676 Color photographs of CdSe nanoparticles illuminated with a long-wave UV lamp

  4. Phosphorescence – Alkaline earth aluminates (MAl2O4, M = Ca, Ba, Sr) doped with Rare earth ions SrAl2O4:Eu2+, Dy3+ Exposed to light SrAl2O4:Eu2+, Dy3+ Glowing in the dark (λem = 520 nm) Insert Fig 1 from Solid State Sciences, 2007, 9, 608 "Phosphorescent pigments" by FK1954 - Own work. Licensed under Public domain via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Phosphorescent_pigments.jpg#mediaviewer/File:Phosphorescent_pigments.jpg

  5. Chemiluminescence – Ru(bipy)32+ Oxidation Add Analyte

  6. Triboluminescence – [Ph3PCH3]2MnBr4 Grind or exposure to aprotic solvents Faint green Bright green Insert Figure 2 from Inorg. Chem. 2014, 53, 6054

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