Abstract: This disclosure relates to the release of singlet oxygen by thermally activated decomposition of aromatic endoperoxide molecules in material systems [e.g. polymer (nano)particles or polymer films]. Due to the short lifespan and diffusion length of singlet oxygen, the technical problem is that the majority of the decomposition may only take place if the singlet oxygen molecules can reach the target region. For example, either the penetration of the polymer particles into the cancer cells to be killed, or the settlement of bacteria on an implant coated with the polymer film, must be accomplished. It is necessary to allow adaptation of the time progression of the decomposition for the application. The adaptation is performed by chemically and/or physically modifying the functional structures present in the material system, each made of the molecule forming the endoperoxide and at least one adjacent molecule or the cage formed by all adjacent molecules.

Abstract: The invention relates to the release of singlet oxygen by thermally activated decomposition of aromatic endoperoxide molecules in material systems [e.g. polymer (nano) particles or polymer films]. Due to the short lifespan and diffusion length of singlet oxygen, the technical problem is that the majority of the decomposition may only take place if the singlet oxygen molecules can reach the target region. For example, either the penetration of the polymer particles into the cancer cells to be killed, or the settlement of bacteria on an implant coated with the polymer film, must be accomplished. It is necessary to allow adaptation of the time progression of the decomposition for the application. The adaptation is performed by chemically and/or physically modifying the functional structures present in the material system, each made of the molecule forming the endoperoxide and at least one adjacent molecule or the cage formed by all adjacent molecules.

Abstract: The electro-optical method described herein provides adjustable voltage dependent optical properties of a solid whereby the characteristics, i.e., the optical response to applied voltage, are separately adjustable for different laser frequencies. The solid has photo-absorbing centers capable of displaying persistent spectral hole burning; the spectral holes are capable of exhibiting electric-field induced filling. The main fields of application for this method are in integrated optics, image processing, and optical data storage.