940910-86-1

Upstream product

• 3286-01-9 2,7-dimethylanthraquinone 
• 1412937-49-5 C₆₂H₆₂O₂P₂⁽²⁺⁾ 
• 100-10-7 4-dimethylamino-benzaldehyde 
• 83121-49-7 2,7-bis-bromomethyl-anthraquinone-9,10 
• 102041-95-2 2,7-bis-acetoxymethyl-anthraquinone-9,10 
• 102041-94-1 2,7-bis-hydroxymethyl-anthraquinone-9,10 
• 1412499-92-3 2,7-dihydroxymethyl-9,10-dipentyloxy-anthracene 
• 1412499-93-4 2,7-dichloromethyl-9,10-dipentyloxy-anthracene 

Relevant academic research and scientific papers

C2v symmetrical two-photon polymerization initiators with anthracene core: Synthesis, optical and initiating properties

A series of C2v symmetrical two-photon absorption compounds with anthracene core, 2,7-bis[2-(4-substituted phenyl)-vinyl]-9,10- dipentyloxyanthracenes designated as I, II and III (the substituted groups at the 4-position of phenyl of I, II and III were dimethylamino, methyl and cyano, respectively) were designed and synthesized as initiators in two-photon induced polymerization (TPIP). The anthracene ring was modified by linking vinylphenyl groups to the 2,7-position to extend conjugation system length and two pentyloxy groups to the 9,10-position to serve as electronic donors. Two-photon absorption cross section of I was around 300 GM, which was much larger than the 10 GM of II and 29 GM of III at 800 nm. I of 0.18% molar ratio in resin composed of methacrylic acid and dipentaerythritol hexaacrylate exhibited a dramatically low threshold of 0.64 mW compared with commercial photoinitiator benzil at a scanning speed 10 μm s-1. Moreover, the threshold of photoinitiator I was only increased to 2.53 mW at a scanning speed of 1000 μm s-1. The dependency of threshold on the concentration and exposure time was in accordance with theoretical calculation. Finally, a reasonable mechanism of the two-photon initiating process was proposed. This study provides good prospects for developing low threshold photoinitiator in TPIP.