1228389-85-2

Upstream product

• 288156-11-6 4,15-diformyl[2.2]paracyclophane 
• 134-81-6 benzil 
• 1220516-14-2 pseudogem-[4-Formyl-13-(4,5-diphenyl-1H-imidazol-2-yl)][2.2]-paracyclophane 
• 554-34-7 1,2-bis(3,4-dimethoxyphenyl)ethane-1,2-dione 

Downstream Products

• 1228389-86-3 pseudogem-DMI-DPI[2.2]paracyclophane 
• 1300531-18-3 C₅₀H₄₂N₄O₄ 
• 1300739-38-1 C₅₀H₄₂N₄O₄ 

Relevant academic research and scientific papers

Comprehensive understanding of structure- photosensitivity relationships of photochromic [2.2]paracyclophane-bridged imidazole dimers

The photochromic [2.2]paracyclophane-bridged imidazole dimers show instantaneous coloration upon exposure to UV light and rapid fading in the dark. Experimental details for the enhancement of the photosensitivity and the unique photoisomerization of newly designed [2.2]paracyclophane-bridged imidazole dimers are demonstrated. We explored the structure-property relationships and demonstrated an efficient strategy for designing high-performance fast-photochromic molecules with increased photosensitivity to solar UVA radiation. The [2.2]paracyclophane-bridged imidazole dimer consists of two types of imidazole rings, Im1 and Im2. Im1 is characterized by a 6π electron system with an electron-donating characteristic, whereas Im2 is distinguished by a 4π electron system with an electron-withdrawing characteristic. The introduction of electron-donating substituents into the phenyl rings attached to the electron-withdrawing Im2 was proved to enhance the photosensitivity with the aid of the intramolecular charge transfer transitions. The unique photoisomerization resulting from the changes in the bonding manner between two imidazole rings was also investigated in detail.

NOVEL CROSSLINKED HEXAARYL BISIMIDAZOLE COMPOUND AND DERIVATIVE THEREOF, METHOD FOR PRODUCING THE COMPOUND AND PRECURSOR COMPOUND TO BE USED IN THE PRODUCTION METHOD

Provided is a crosslinked hexaaryl bisimidazole compound which can achieve photochromic characteristics, i.e., visually showing decoloring simultaneously with the stop of light irradiation and enables precise control of color tone, density and so on in coloring. Also provided are a method for producing the aforesaid compound whereby the degrees of freedom in molecular design and synthesis can be increased, and a precursor compound to be used in the production method.