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Diarylethenes with Electro-active Substituents for Optical Memories: A Theoretical Study and the Realization of a Memory with a Readout in the Mid Infrared
- Source :
- Molecular Crystals and Liquid Crystals. 431:487-493
- Publication Year :
- 2005
- Publisher :
- Informa UK Limited, 2005.
-
Abstract
- Since photochromic molecules occur as two stable forms, they can be used to make optical memories. The readout process must preserve the information stored and can be carried on by using mid-IR light and exploiting the differences in the IR spectrum between the two forms. Three diarylethenes with different electroactive lateral substituents have been studied theoretically (B3LYP 6-31G**) to understand the effect of the substituent on the difference in absorbtion intensities of the vibrational spectrum. Calculations show that the presence of a donor group in the molecule enhances the absorbtion intensity of some normal modes of the molecule in the closed form. The molecule with a donor side group has been synthesized, a film was deposited on a substrate, a simple setup with a multibolometer camera has been built and patterns written on the film were read.
- Subjects :
- business.industry
Chemistry
Mid infrared
Substituent
Infrared spectroscopy
General Chemistry
Substrate (electronics)
optical memories
Condensed Matter Physics
DFT
diarylethenes
Photochromism
chemistry.chemical_compound
Optics
Normal mode
Optoelectronics
Molecule
General Materials Science
DFT, diarylethenes, infrared spectroscopy, optical memories
infrared spectroscopy
business
Realization (systems)
Subjects
Details
- ISSN :
- 15635287 and 15421406
- Volume :
- 431
- Database :
- OpenAIRE
- Journal :
- Molecular Crystals and Liquid Crystals
- Accession number :
- edsair.doi.dedup.....40be620ab268e258a3e6e3361310dc23