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413045

Solvent effects on the UV-visible absorption spectra of some new (4-arylazothiophen-2-yl) (5-bromothiophen-2-yl) ketone dyes

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Last updated: 25 Feb 2025

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Abstract

A facile synthesis of various (4-arylazothiophen-2-yl) (5-bromothiophen-2-yl) ketone dyes 4a-e was described through heterocyclization of the precursor 2-arylazo-2-acetyl-thioacetanilides 3 with 5-bromo-2-(bromoacetyl)-thiophene. The effect of solvent polarity on absorption spectra was investigated, as was the relationship between dye structures and absorption in the UV–visible region. The absorption maxima of the tested arylazo-thiophene dyes ranged from 464 to 490 nm in ethanol, from 484 to 492 nm in DMF and from 494 to 496 nm in acetone.

DOI

10.21608/mjcc.2019.413045

Keywords

2-Acetyl-2-arylazothioacetanilides, 5-Bromo-2-(bromoacetyl)-thiophene, dithiophen-2-yl ketones, UV-visible Absorption, solvent effect

Volume

46

Article Issue

4

Related Issue

53941

Issue Date

2019-12-01

Receive Date

2025-02-19

Publish Date

2019-12-01

Page Start

12

Page End

15

Print ISSN

1687-5060

Online ISSN

2974-4938

Article File

MJCC_Volume 46_Issue 4_Pages 12-15.pdf

PDF . 662.3kB

Link

https://micc.journals.ekb.eg/article_413045.html

Detail API

http://journals.ekb.eg?_action=service&article_code=413045

Order

413,045

Type

Original Article

Type Code

3,440

Publication Type

Journal

Publication Title

Mansoura Journal of Chemistry

Publication Link

https://micc.journals.ekb.eg/

MainTitle

Solvent effects on the UV-visible absorption spectra of some new (4-arylazothiophen-2-yl) (5-bromothiophen-2-yl) ketone dyes

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Type

Article

Created At

25 Feb 2025