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Photochromism is a phenomenon in which a single chemical species changes its molecular structure without altering its molecular weight due to the action of light, resulting in the reversible generation of two different isomers. Since the two isomers are molecules with different properties, it is expected that various applications can be developed by reversibly changing molecular physical properties such as absorption spectra and refractive index through light. Photochromic materials can be broadly classified into two types: "T-type" and "P-type," based on thermal stability. We offer a wide range of materials to meet various needs. 【Features】 ○ T-type → Materials that undergo transformation through heat as well as light → Representative examples include azobenzene and spiropyran ○ P-type → Materials in which both isomerization processes occur only under light irradiation and do not change with heat → Representative examples include diarylethene and fulgide For more details, please contact us or download the catalog.
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**Features** [T-type Photochromic Materials] ○ Materials in which the reversible reaction process occurs only due to heat ○ When spiro compounds are irradiated with light containing ultraviolet rays, such as UV light or sunlight, they isomerize from the closed form to the open form, becoming a metastable merocyanine and getting colored ○ The merocyanine can return to the stable original closed form and lose color due to light blocking or heat ○ Utilizing such properties, applications in dimming materials and others are expected [P-type Photochromic Materials] ○ Materials in which the reversible reaction process occurs only due to light irradiation ○ Under ultraviolet irradiation, the open form takes on a closed structure, forming a colored six-membered ring structure ○ By irradiating the closed form with visible light, it reopens and returns to the original structure ○ Diarylethene compounds are expected to be applied in various fields, leveraging their characteristics of repeated durability and excellent thermal stability ● For more details, please contact us or download the catalog.
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【Main Application Areas】 - Recording media, sensor applications, dimming applications, textile applications, etc. ● For more details, please contact us or download the catalog.
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With the spirit of "harmony and respect" as our corporate philosophy, and "the relentless development of advanced science and technology" as our management principle, we are committed to daily technological development to meet the needs of a fast-paced era, based on the technical expertise cultivated through our dye, thermosensitive, and pressure-sensitive pigment businesses since our founding, including functional pigments related to electronic information.