14—the Absorption Spectra of the Direct Dye Benzopurpurine 4b and Related Structures

Standing, H. A.; Stein, Monika

doi:10.1080/19447025308659741

Journal of the Textile Institute Transactions

1953

DOI: 10.1080/19447025308659741

|View full text |Cite

14—the Absorption Spectra of the Direct Dye Benzopurpurine 4b and Related Structures

H. A. Standing¹,

Monika Stein²

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1960

1965

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Absorption Spectra of Dyes. VI. Steric Effects in Conjugated Systems of Benzidine Disazo Dyes and their Copper Derivatives

Kobayashi¹,

Tanizaki²,

Ando³

1960

Bulletin of the Chemical Society of Japan

View full text Add to dashboard Cite

1. Absorption spectra of benzidine disazo dyes and their copper derivatives in aqueous solution were measured at room temperature, and they are compared with one another. 2. It was shown by a simple calculation that the dyes, each of which has sulfonic groups adjacent to the azo groups, have strained conformations caused by the repulsion between the sulfonic groups and the unshared electrons of nitrogen. It was also shown that the relationship between the relative positions of sulfonic groups to the azo groups and the relative absorption intensities could well be explained. 3. The absorption intensities of the copper derivatives were nearly equal, having no relation to the positions of the sulfonic groups, and in addition they were near to those of the non-copper dyes which have the sulfonic groups adjacent to the azo groups. Hence, it was pointed out that the introduction of copper caused the same extent of strain in conjugated systems as sulfonic groups did.

show abstract

Absorption Spectra of Dyes. VI. Steric Effects in Conjugated Systems of Benzidine Disazo Dyes and their Copper Derivatives

Kobayashi¹,

Tanizaki²,

Ando³

1960

Bulletin of the Chemical Society of Japan

View full text Add to dashboard Cite

show abstract

Absorption Spectra of Dyes. IX. Electronic Spectra of a 1 : 1 and a 1 : 2 Complex, and CT-Bands

Hoshi¹,

Tanizaki²,

Ando³

1965

Bulletin of the Chemical Society of Japan

View full text Add to dashboard Cite

1) The absorption spectra of binary mixtures of Chrysophenine G (notation: G) and disazo dyes (P), which were the same as those used in a preceding study,1) have been measured at room temperature (ca. 20°C), and the characteristic spectra of the complexes have been determined by using the equilibrium constants, K1 and K2, previously obtained (at 20°C) for the 1 : 1 (PG) and 1 : 2 (PG2) complex formation. 2) The absorption spectra of the PG and PG2 complex have been compared with the respective corresponding additive spectra (P+G and P+2G), and the correlations among these spectra have been discussed in detail. 3) The MO pattern of the G molecule has been decided empirically by applying Platt’s theory; similarly, that of the P molecule has been decided by assuming that there is at least one symmetry species; then the spectral change caused by the complex formation could be explained in relation to the MO’s of the component molecules. 4) It has been confirmed that there exists an intermolecular charge transfer from P as an electron donor to G as an acceptor. It has also been shown that the first band of a disazo dye (P) consists of two electronic transitions; one is a π→π*(shorter wavelength) and the other an l→π* transition (longer wavelength).

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

14—the Absorption Spectra of the Direct Dye Benzopurpurine 4b and Related Structures

Cited by 2 publications

References 5 publications

Absorption Spectra of Dyes. VI. Steric Effects in Conjugated Systems of Benzidine Disazo Dyes and their Copper Derivatives

Absorption Spectra of Dyes. VI. Steric Effects in Conjugated Systems of Benzidine Disazo Dyes and their Copper Derivatives

Absorption Spectra of Dyes. IX. Electronic Spectra of a 1 : 1 and a 1 : 2 Complex, and CT-Bands

Contact Info

Product

Resources

About