fluorene


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fluorene

[′flu̇‚rēn]
(organic chemistry)
C13H10 A hydrocarbon chemical present in the middle oil fraction of coal tar; insoluble in water, soluble in ether and acetone, melting point 116-117°C; used as the basis for a group of dyes. Also known as 2,3-benzindene; diphenylenemethane.
References in periodicals archive ?
3M PR500 expoxy resin is an one part resin containing a mixture of diglycidyl ethers of ortho-substituted-4-hydroxy-phenylfluorene base resin and 9,9-bis (aminophenyl) fluorene hardener.
The factor loading showed that within the first axis, concentrations of Cu, Cr, Fe, Mn, Ni, Pb, Zn, naphthalene, fluorene, anthracene, pyrene, total lmw PAHs, total hmw PAHs, and total PAHs were positively correlated with the levels of MT; activity of AOX, ECOD, catalase, GR, TOSC toward ROO * and HO *; and onset of total DNA damage, whereas the same parameters were negatively associated with NRRT of lysosomes.
The accuracy of the hydrocarbon analyses was estimated by recoveries from the spiked blank, which ranged from 69 to 111% for 17 different PAHs (naphthalene, 102%; fluorene, 85%; dibenzothiophene, not determined; phenanthrene, 98%; chrysene, 83%).
On the other hand, naphthalene, acenaphthene, fluorene, anthracene, pyrene, and benzo(g,h,i)perylene were not detected in milk samples during both periods.
Results suggest that, fluorene, acenaphthylene, naphthalene and anthracene contain sufficient amount of these PAHs in peel as well as in core of three vegetables found in this agricultural land.
Among the fluorescence emission unit, those containing fluorene groups which have gained increasing attention for their fundamental investigation and intelligent applications due to their good fluorescence quantum yield, large optical gain, outstanding optical responsibility and high charge-carrier mobility [13, 14].
The ratios of excretion to intake via dermal absorption for fluorene, phenanthrene, and pyrene were lower than the ratios from dietary exposure but higher than the ratios from inhalation.
Polycyclic aromatic hydrocarbons (PAHs): Naphthalene, acenaphthylene, acenaphthene, phenanthrene, fluorene, anthracene, pyrene, chrysene (internal standard (i.s)), benzo(a)anthracene, fluoranthene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(a)pyrene, benzo(g,h,i)perylene, indeno(1,2,3-cd)pyrene and dibenzo(a,h)anthracene.
Calibration was achieved using a commercial standard solution of BTEXs and 3 custom standard solutions of [C.sub.9]-[C.sub.20] n-alkanes, [C.sub.6]-[C.sub.18] n-FAs, and PAHs containing naphthalene (N), Acenaphtene (A), Fluorene (F), Phenanthrene (Ph), Anthracene (An), Fluoranthene (Fl), and pyrene (Py) (LGC Standards, LGC Ltd.).
Chen, "Morphology and photophysical properties of light-emitting electrospun nanofibers prepared from poly(fluorene) derivative/PMMA blends," Macromolecules, vol.
The structure, an alternated copolymer of fluorene and terpyridine, namely, poly[(9,9-bis(3-((S)-2- methylbutylpropanoate))fluorene-alt-6,6'-(2,2':6' ,2" terpyridin-6-yl)] (LaPPS71), is depicted in Figure 1.