US 7,452,950 B2 · Photochromic monomers, photochromic polymers based on the same, photochromic recording media comprising the photochromic polymers, and 3D read/write optical memory comprising the recording media

Photochromic monomers, photochromic polymers based on the same, photochromic recording media comprising the photochromic polymers, and 3D read/write optical memory comprising the recording media

AssigneesSamsung Electronics Co., Ltd., Photochemistry Center of Russian Academy of Sciences

InventorsAlexandr Alexandrovich Dunaev, Mikhail Vladimisovich Alfimov, Valery Alexandrovich Barachevsky, Valery Alexandrovidh Vasnev, Igor Victorovich Zavarzin, Sergey Nikolaevich Ivanov, Mukhammed Lastanbievich Keshtov, Ajexel Ivanovich Kovalev, Mikhall Mikhallovich Krayushkin, Yury Alexandrovich Pyankov, Alexandr Lyovich Rusanov, Yury Petrovich Strokach, Vladimir Nikolaevich Yarovenko

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Abstract

Photochromic monomers and methods for preparing these photochromic monomers, photochromic polymers based on these photochromic monomers and methods for preparing these photochromic polymers, as well as the use of these photochromic polymers in a polymer binder as a two-photon recording medium for an optical 3D memory and photoswitches of optical signals are disclosed. The materials exhibit thermally irreversible photochromic transformations and other properties enabling the use of the photochromic polymers in an optical two-photon read/write memory.

Claims25

Dependent claims

A condensation-type photochromic polymer having a structural unit in a main chain derived from photochromic monomers of the general formula (I):

wherein:
each of the substituents Q is independently selected from below,
Alk is a C1-10 alkyl group;
and
X is Cl, Br, I, F, NH2, CH2OH, CH2Cl, CH2Br, CHO, or COOH.

2 more elements

Dependencies are inferred from the claim text.