Molecular Materials for Optical Data Storage

Brian Lohse

Research output: Book/ReportPh.D. thesis


The optical data storage field has grown and matured over the last 25 years, which is evident from the amount of published work in this field. This Ph.D.-thesis deal with different aspects of the optical data storage field, such as storage by photodimerization, the gray scale technique, new synthesized organic molecular materials, characterization and testing of these materials.

Two chromophores were found to fulfill the stringent requirements for becoming an optical data storage media, one for the current state of the art Blu-ray technology (acridizinium perchlorate), and one for the future technology based upon UV-laser (uracil). Furthermore a library of different series of molecular materials were synthesized, characterized and tested, for applications in optical data storage: pyrimidine substituted di- and oligopeptides, alkylated uracils and bis-uracils, uracil-bis-MPA as well as uracil-PAMAM dendrimers, for the UV-laser technology, and for the Blu-ray an acridizinium-bisMPA was synthesized.

All the systems were screened, in order to find the best candidates from each system, and were initially analyzed in solution using UV-Vis spectrometry. A very reliable screening method was developed, and here the correlation between the material in solution and in film for the same compound was always in agreement.

The chosen molecular materials were cast onto quartz plates, and the films were subjected to different experiments e.g. transmission, in order to get a view of the photodimerization efficiency, film forming properties and stability.

In conclusion, a 1,1’(1,8-octanediyl)-bis[uracil] was found to posses the best overall performance, as a new potential material for future optical data storage, using UV-laser technology. Furthermore we found that the 2nd generation of acridizinium-bis-MPA can serve as a new potential material for the present state of the art optical data storage technology, in a Blu-ray system.
Original languageEnglish
Place of PublicationKgs. Lyngby
PublisherTechnical University of Denmark
Number of pages61
ISBN (Print)978-87-91435-52-8
Publication statusPublished - 2007


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