Fading of Nitrodiphenylamine Dyes in Relation to their Structure and Ultraviolet Absorption Spectra | Zendy

ASQUITH R. S. | Zendy; BRIDGEMAN I. | Zendy; JNR A. T. PETERS | Zendy

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Fading of Nitrodiphenylamine Dyes in Relation to their Structure and Ultraviolet Absorption Spectra

Author(s) -

ASQUITH R. S.,

BRIDGEMAN I.,

JNR A. T. PETERS

Publication year - 1965

Publication title -

journal of the society of dyers and colourists

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.297

H-Index - 49

eISSN - 1478-4408

pISSN - 0037-9859

DOI - 10.1111/j.1478-4408.1965.tb02616.x

Subject(s) - fading , ultraviolet , relation (database) , absorption (acoustics) , absorption spectroscopy , spectral line , chemistry , photochemistry , physics , optics , telecommunications , computer science , quantum mechanics , decoding methods , database

Previous assumptions that ultraviolet absorption spectra can be used to indicate the presence of ‘quinonoid’ forms in nitrodiphenylamine dyes are substantiated. These forms may, however, only occur to a significant extent during irradiation, i. e. as excited charge–transfer forms. The differences in wavelength of maximum absorption (λ max ) between ortho and para forms would indicate that differentiation between them may be possible in cases where both forms can exist.

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