Study of the Pi Complexes of 2,4,7-Trinitrofluorenone with Phenols, Aromatic Hydrocarbons, and Aromatic Amines.

Abstract

In contrast to tetracyanoethylene (TCNE), which is a x complexing agent with some selectivity for methyl substituted benzenes and phenols, 2,4,7trinitro-9-fluorenone (TNF) complexes more strongly with aromatic molecules having at least three fused ringse.g., phenanthrene, pyrene, perylene, etc. TNF and TCNE are compared as to their complexation of various

Spectrophotometric Determination of Microgram Amounts of Aliphatic Amines with Quinalizarin

“…To check the selectivity of the method, 100 g.ml -1 of ethylamine as a typical aliphatic amine was determined using the recommended procedure in the presence of various foreign organic and inorganic compounds. The results shown in Table (5) indicate that the method was selective. Arginine interferes seriously due to the presence of basic amino group in its side chain.…”

“…Various  acceptors have been used for the determination of amines spectrophotometrically via n- CT-complex formation reaction with 2,4,7-trinitrofluorenone (5) , p-benzoquinone (6) , 2,6-dichloro-pbenzoquinone (7) , trinitrobenzene (8) , 2,3,5,6-tetrachloro-p-benzoquinone (Chloranil) (9)(10)(11)(12) , 2,3,5,6-tetrafluoro-p-benzoquinone (Fluoranil) (13) , 2,3dichloro-5,6-dicyano-p-benzoquinone (DDQ) (14,15) and 2,3,5,6tetrabromo-p-benzoquinone (Bromanil) (16) . Benzylamine was determined spectrophotomertically by its reaction with Cu-NTA complex in aqueous solution leading to increase the absorbance at  max 832 nm with accuracy of 99% and RSD < 4.6% (17) .…”

Spectrophotometric Determination of Tertiary Aromatic Amines in the Presence of Primary and Secondary Amines by Complexation with Tetracyanoethylene.

“…It has also been observed that 0AM perchloric acid-triethyl phosphate solvent prevents complexation of TNF and moderately basic amines but does not prevent complexation of TNF and weakly basic amines like carbazole and diphenylamine (12). This suggested a very selective method for determining those amines in the presence of more basic primary, secondary, or tertiary amines.…”

A Study of the Effect of Tetracyanoethylene, Trinitrofluorenone, and Other Pi Acceptors on the Fluorescence of Aromatic Carbons.

“…i acceptoes or acids such as tetracyanoethylene (TCNE) (IS) and 2,4,7-trinitrofluorenone (TNF) (16) have been studied for their potential use in spectrophotometric methods for donors or bases. Another potential analytical use for these compounds is that of quenching or modifying the fluorescence of aromatic hydrocarbons.…”

“…The resulting precipitate was washed with benzene and recrystallized from benzene and acetone (9). 2,4,7-Trinitrofluorenone (TNF) was purified by recrystallization from 3:1 nitric acid-water (16). Maleic anhydride was purified by sublimation.…”