Luminescence 1 This slide show was created by Vivian Ezeh, Colgate University and posted on VIPEr ( on Aug 18, This work is licensed under the Creative Commons Attribution Non-commercial Share Alike License. To view a copy of this license visit

Luminescence The emission of light from the excited state of a substance Application of Luminescence Medical Diagnostics, Flow cytometry, Forensics, Phosphors, Glow toys, Chemical reactions etc. Insert Jablonski diagram from

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. Color photographs of CdSe nanoparticles illuminated with a long-wave UV lamp Insert figure 20.1 from: Lakowicz, J. R., Principle of Fluorescence Spectroscopy. Kluwer Academic/Plenum: 2006; p 676

Phosphorescence – Alkaline earth aluminates (MAl 2 O 4, M = Ca, Ba, Sr) doped with Rare earth ions SrAl 2 O 4 :Eu 2+, Dy 3+ Exposed to light SrAl 2 O 4 :Eu 2+, Dy 3+ Glowing in the dark (λ em = 520 nm) Insert Fig 1 from Solid State Sciences, 2007, 9, 608 "Phosphorescent pigments" by FK Own work. Licensed under Public domain via Wikimedia Commons -

Chemiluminescence – Ru(bipy) 3 2+ Oxidation Add Analyte

Triboluminescence – [Ph 3 PCH 3 ] 2 MnBr 4 Insert Figure 2 from Inorg. Chem. 2014, 53, 6054 Grind or exposure to aprotic solvents Faint greenBright green