Energy transfer via guest excitons in isotopic mixed naphthalene crystals

✍ Scribed by H. Port; D. Vogel; H.C. Wolf

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 463 KB
• Volume: 34
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(75)80193-x

✦ Synopsis

The temperature dependence of the fluorescence spectra ofqegregates in napkthalene-perdcuteronaphthalcnc mixed crysti has been investigated between 1.4 and 70 K and for concentrations up to 50% naphthalene.

It is shcwn that the most abundant traps -the monomer guest molecules -transfer energy like a guest cxciton band 46 cm-' below the host exciton band. With incrusing temperature, the excitation energy is redistributed between the diiferent aggegatc traps by thermal activation into the monomer states. The enegy transfer constant within the monomer exciton band is measured as a function of concentration. It is sugscsted that dipole-dipole interaction between the monomer guests is responsible for the energy transfer via guest esci:ons.