Solvation dynamics in a solid host. Coumarin 480 in zeolite 13X

✍ Scribed by Kaustuv Das; Nilmoni Sarkar; Swati Das; Anindya Datta; Kankan Bhattacharyya

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 308 KB
• Volume: 249
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(95)01436-5

✦ Synopsis

The dynamics of soivation of coumarin 480 guest molecule in supercages of a faujasite zeolite 13X is studied using picosecond time-resolved emission spectroscopy. The guest molecule exhibits a time-resolved Stokes shift in zeolite 13X.

The decay of the response function, C(t), is nonexponential with the major components on a nanosecond timescale. The average solvation time is observed to be 8.13 ns. The nanosecond solvation is attributed to the self-motion of the probe solute and the motion of the sodium ions present in the zeolite host.