Spectrophotometric study on the charge-transfer reaction between 4-aminopyridine with 2,5-dihydroxy-p-benzoquinone in methanol and the binary mixture 50% acetonitrile + 50% 1,4-dioxane (v/v)

Khairia Mohamed Al-Ahmary; Moustafa Mahmoud Habeeb; Eman Atya Al-Solmy

doi:10.1080/00319104.2013.764500

Back

Spectrophotometric study on the charge-transfer reaction between 4-aminopyridine with 2,5-dihydroxy-p-benzoquinone in methanol and the binary mixture 50% acetonitrile + 50% 1,4-dioxane (v/v)

Journal article

Peer reviewed

Spectrophotometric study on the charge-transfer reaction between 4-aminopyridine with 2,5-dihydroxy-p-benzoquinone in methanol and the binary mixture 50% acetonitrile + 50% 1,4-dioxane (v/v)

Khairia Mohamed Al-Ahmary, Moustafa Mahmoud Habeeb and Eman Atya Al-Solmy

Physics and chemistry of liquids, Vol.51(5), pp.621-634

01/09/2013

DOI: https://doi.org/10.1080/00319104.2013.764500

Abstract

2,5-dihydroxy-p-benzoquinone

4-aminopyridine

charge transfer

hydrogen bond

spectrophotometry

Charge-transfer (CT) reaction between 4-aminopyridine (4APy) as the electron donor with 2,5-dihydroxy-p-benzoquinone (DHBQ) as the electron acceptor has been investigated spectrophotometrically in methanol (MeOH) and a binary mixture composed of 50% acetonitrile and 50% 1,4-dioxane (v/v) (ANDI). The composition of the complex has been investigated utilising Job's and photometric titration methods to be 1:1. Benesi-Hildebrand equation has been applied to estimate the formation constant of the CT reaction (K CT ) and the molecular extinction coefficient (ϵ) where they reached high values confirming high stability of the produced complex. The solid CT complex (4APy-DHBQ) was isolated, and elemental analysis proved its formation in 1:1 ratio. A spectral study on the formed complex has been carried out using infrared and 1 H NMR measurements, where it included hydrogen bonding beside CT.

Metrics

1 Record Views

Details

Title: Spectrophotometric study on the charge-transfer reaction between 4-aminopyridine with 2,5-dihydroxy-p-benzoquinone in methanol and the binary mixture 50% acetonitrile + 50% 1,4-dioxane (v/v)
Creators - without role: Khairia Mohamed Al-Ahmary - King Abdulaziz University
Moustafa Mahmoud Habeeb - King Abdulaziz University
Eman Atya Al-Solmy - King Abdulaziz University
Publication Details: Physics and chemistry of liquids, Vol.51(5), pp.621-634
Publisher: Taylor & Francis
Identifiers: 9933009908331
Academic Unit: University of Jeddah
Language: English
Resource Type: Journal article