The Spectra of the p-Dimethylaminochalcones and of their Ions

Katzenellenbogen, Estella R.; Branch, Gerald E. K.

doi:10.1021/ja01199a013

Cited by 11 publications

(4 citation statements)

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“…When distilled water was employed, the dye base was treated with the calculated amount of hydrochloric acid of molarity 1.0 X 10~2. A chloroform solution of the dye was prepared utilizing a previously described procedure (15). In all cases, the molarities of the dye solutions were between 8 X 10""6 and 1.2 X 10-5.…”

Section: Experimental4mentioning

confidence: 99%

Studies on the Chemistry of Heterocyclics. Xx. The Absorption Spectra of Some Triarylmethane Dyes Containing a Thiophene Ring

Mason¹,

Nord²

1952

J. Org. Chem.

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In a previous communication from this laboratory (1), the preparation of a variety of triarylmethane dyes containing a thiophene ring was presented. It was also demonstrated that when the phenyl ring in Malachite Green is replaced with the 2-thienyl group, a bathochromic effect is produced. In a continuation of our investigation on these dyestuffs, the absorption spectrum of Thiophene Malachite Green3 in different solvents as well as the spectra of some thiophenesubstituted dyes were determined in an endeavor to ascertain not only the effect produced by the medium on this dye, but also that of various substituents attached to the heterocyclic moiety. The dyestuffs studied are as follows:

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Section: Experimental4mentioning

confidence: 99%

Studies on the Chemistry of Heterocyclics. Xx. The Absorption Spectra of Some Triarylmethane Dyes Containing a Thiophene Ring

Mason¹,

Nord²

1952

J. Org. Chem.

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“…The direct demonstration of such oriented excitation offers considerable experimental difficulty, and more often the indirect approach is made as described above in the case of the crystal violet dyes. For example, Katzenellenbogen and Branch (146) studied the spectra of p-dimethylaminobenzophenone (XVIII) and two of its vinylogs, chalcones XIX and XX. Katzenellenbogen and Branch point out that the direction parallel to the line joining the oxygen and nitrogen atoms in XVIII and XIX should be the axis of maximum polarizability in these molecules (z-band) and that one can say as a first approximation that in XX the ethylenic bond chiefly increases the polariza- bility along the z-axis, while in XIX it chiefly increases the polarizability along the y-axis.…”

Section: Y-bandsmentioning

confidence: 99%

“…See also the fine discussion of x-, y-, and x'-bands by Branch, Colbert, and coworkers(33,145,287,288) 23. From quantum-mechanical considerations Forster(92) has concluded that malachite green should have two bands to the one of crystal violet.…”

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confidence: 99%

Relationships between Absorption Spectra and Spectra and Chemical Constitution of Organic Molecules.

Ferguson¹

1948

Chem. Rev.

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“…However, it hardly be said about the properties of chalcone and its amino-derivatives. Due to the flexible -CQC-C(-)QO chain and non-planar structure [8,9] they have distinguishing features, such as fluorescence quenching in protic solvents [4,[10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%