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 absorption intensities of the vibrational spectrum. Calculations show that the presence of a donor group in the molecule enhances the absorption intensity of some normal modes of the mol- ecule 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.

Diarylethenes with Electro-active Substituents for Optical Memories: A theoretical Study and the Realization of a Memory with a Readout in the Mid Infrared.

BIANCO, ANDREA;BERTARELLI, CHIARA;ZERBI, GIUSEPPE;
2005-01-01

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 absorption intensities of the vibrational spectrum. Calculations show that the presence of a donor group in the molecule enhances the absorption intensity of some normal modes of the mol- ecule 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.
2005
DFT, diarylethenes, infrared spectroscopy, optical memories
File in questo prodotto:
File Dimensione Formato  
23_mol_cryst_liq_cryst_2005.pdf

Accesso riservato

: Publisher’s version
Dimensione 145.64 kB
Formato Adobe PDF
145.64 kB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/513623
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 2
social impact