Fluorophenyl-fluorene

Eused-ring polycycHc fluoroaromatics can be made from the corresponding amino fused-ring polycycHc or from preformed fluoroaromatics, eg, 4-fluorophenyl-acetonitrile [459-22-3] (275). Direct fluorination techniques have been successfully appHed to polycycHc ring systems such as naphthalene, anthracene, benzanthracenes, phenanthrene, pyrene, fluorene, and quinoHnes with a variety of fluorinating agents xenon fluorides (10), acetyl hypofluorite (276), cesium fluoroxysulfate (277), and electrochemical fluorination (278,279). 

The oxadiazole group is already present in 2,2 -(oxydi-4,l-phenyl-ene)bis[5-(4-fluorophenyl)-l,3,4-oxadiazole], c.f. Figure 10.1. The compound can he condensed with various naphthalenedioles, such as 1,5-na-phthalenediol to result in PODA types. AH polymers are amorphous materials and some of them are soluble in aprotic solvents. Alkylated 2,7-dibromo-9H-fluorene compounds, with pendent carhazole and oxadiazole units can be condensed with nickel catalysts. ... 

Also materials based on 4-fluorophenyl sulfone, 9,9 -bis(4-hydroxyphenyl) fluorene, and 4,4 -sulfonyldiphenol, can be quaternized by a similar procedure [115]. In addition, PAES ionomers with... 

Fluorenes. Di-(p-fluorophenyl)trifluoromethylcarbinol shaken 6 hrs. with coned. H2SO4 in a glass-stoppered flask, which is opened occasionally to release the liberated HF, then poured slowly with stirring on crushed ice 3-fluoro-6-hydroxy-9-trifluoromethylfluorene. Y 67%. F. e. s. S. Cohen, Am. Soc. 79, 1499 (1957) Tetrahedron 11, 252 (1960). 

Fluoro-substituted silole-containing polymers were recently prepared by Suzuki polycondensation reaction using 2,5-dihydroxyboryl-l,l-dimethyl-3,4-bis(3-fluorophenyl)-silole or l,3-dibromo-5-fluoro-benzene as fluoro-containing monomers and 2,7-dibromo-9,9-dioctyl-fluorene or 2,5-dihydroxyboryl-l,l-dimethyl-3,4-bis(phenyl)-silole as co-monomers [221]. With a polymerization... 

NJ -dimethylacetamide (DMAc), methanol, phenol, pyridine, cyclohexanone, N-methyl-2-pyrrolidinone (NMP), 4,4-(hexafluoToisopropylidiene)diphe-nol, dimethyl isophthalate, hydrazine hydrate, 4-fluorobenzoyl chloride, phosphorous oxychloride, and potassium carbonate were obtained from Aldrich and used without purification. 9,9-bis(4-hydroxyphenji)fluorene and l,l-bis(4-hydrojy-phenyl)-l-phenylethane were obtained from Kennedy and Klim and used without purification. 23-Bis(4-fluorophenyl)-l,3,4-oxadiazole (1) was prepared as previously described (7) and its thesis is depicted in Sdieme 1. 

Poly(arylene ether sulfone)s containing perfiuorinated sulfonic acid groups were prepared by the polycondensation of 2,7-dibromo (or 2,7-diiodo)-9,9-/ /s(4-hydroxy-phenyl)fluorene with / rX4-fluorophenyl)sulfone, followed by perfiuorosulfonation via the Ullmann reaction (Scheme 4.18). 

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