Publication

Luminescence of ion-pair and spin-excited states of I2 in solid xenon

Majed Chergui
2001
Journal Articles

Abstract

We report UV and visible mol. ion-pair emission upon 193 nm excitation of I2 in solid xenon. By comparison to mol. emission obsd. in Kr matrixes, it is assigned to the d(2u)->2g (I*+I) and d(2u)->2g (I+I) transitions. The solvation energy of this charge transfer state is surprisingly small, and the fluorescence is efficiently quenched when the sample temp. is raised. Population may partially flow into valence states correlating to the I*+I* asymptotes. In contrast to all lighter matrixes, I*+I*->I2 luminescence is obsd. upon excitation in the region of ion-pair absorption in solid Xe. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/09955d81-9ff9-4574-866a-4eecd2a9a4a1

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Majed Chergui
2001
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/09955d81-9ff9-4574-866a-4eecd2a9a4a1

About this result

Related concepts (32)

Ion

An ion (ˈaɪ.ɒn,_-ən) is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by convention. The net charge of an ion is not zero because its total number of electrons is unequal to its total number of protons. A cation is a positively charged ion with fewer electrons than protons while an anion is a negatively charged ion with more electrons than protons.

Xenon

Xenon is a chemical element with the symbol Xe and atomic number 54. It is a dense, colorless, odorless noble gas found in Earth's atmosphere in trace amounts. Although generally unreactive, it can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized. Xenon is used in flash lamps and arc lamps, and as a general anesthetic. The first excimer laser design used a xenon dimer molecule (Xe2) as the lasing medium, and the earliest laser designs used xenon flash lamps as pumps.

Fluorescence

Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. It is a form of luminescence. In most cases, the emitted light has a longer wavelength, and therefore a lower photon energy, than the absorbed radiation. A perceptible example of fluorescence occurs when the absorbed radiation is in the ultraviolet region of the electromagnetic spectrum (invisible to the human eye), while the emitted light is in the visible region; this gives the fluorescent substance a distinct color that can only be seen when the substance has been exposed to UV light.

Related publications (9)

Luminescence of ion-pair and spin-excited states of I2 in solid xenon

Chat with Graph Search

Imaging solvated oxygen atoms with a femtosecond laser

Moratorium.

Stepwells: Reviving India’s Cultural and Traditional Water Storage Systems