Block Copolymer and Polymeric Luminescent Element

Preparation of 3,7-Dimethyloctyloxy)Benzaldehyde-Terminated Poly[9,9-Dioctyl)2,7-Fluorine] 

A mixture consisting of 9,9-dioctyl-2,7-dibromofluorene (2.7 g), 4-bromo-2,5-(3,7-dimethyl- octyloxy)-benzaldehyde (2.3 g), 2,2 -bipyridyl (2.7 g), and 150 ml of THF was charged into a reaction container under argon. It was then treated with bis(l,5-cyclooctadiene)nickel(O) (5.0g), stirred for 10 minutes at ambient temperature, and reacted at 60°C for 7 hours. The mixture was cooled and precipitated into a solution of 25% NH4OH (aq)/methanol/water, 50 ml 100 ml 100 ml, respectively, and then stirred for 1 hour and isolated. The residue was dried, dissolved in chloroform, filtered, and reprecipitated in methanol. The solid was dried under reduced pressure, and 1.4g of product was isolated. 

2-Methoxy-5-(2-ethylhexyloxy)-p-xylylene dichloride and triethyl phosphate were initially reacted to generate the corresponding phosphonate. Thereafter a mixture of the phosphonate (0.016 g), the Sep 1 product (0.5 g), and 50 ml of THF was charged into a reactor and treated dropwise at ambient temperature with potassium t-butoxide (0.07 g) dissolved in 5 ml of THF over a 10 minute period. The mixture reacted for 2.5 hours at ambient temperature and was then neutralized with acetic acid. The polymer was precipitated by pouring into methanol and dried, and the product was isolated. 

Three fluorescent polymeric derivatives, (I)-(III), are provided below. 

TABLE 1. Physical properties of experimental polymers prepared according to the current invention. 

---

Title Block Copolymer and Polymeric Luminescent Element... 

---