A comparative study of the metal binding behavior of alanine based bis-thiourea isomers

Abstract Two new symmetrical bis-thiourea, 2,2′-[{(terephthaloylbis(azanediyl)bis(carbonothioyl) bis(azanediyl)}dipropanoic acid] (1A) and 3,3′-[{(terephthaloylbis(azanediyl)bis (carbonothioyl)bis(azanediyl)} dipropanoic acid] (1B) were synthesized by the reaction of terephthaloyl chloride with α- a...

Full description

Bibliographic Details
Main Authors: Imran Fakhar, Bohari M. Yamin, Siti Aishah Hasbullah
Format: Article
Language:English
Published: BMC 2017-08-01
Series:Chemistry Central Journal
Subjects:
Online Access:http://link.springer.com/article/10.1186/s13065-017-0304-2
Description
Summary:Abstract Two new symmetrical bis-thiourea, 2,2′-[{(terephthaloylbis(azanediyl)bis(carbonothioyl) bis(azanediyl)}dipropanoic acid] (1A) and 3,3′-[{(terephthaloylbis(azanediyl)bis (carbonothioyl)bis(azanediyl)} dipropanoic acid] (1B) were synthesized by the reaction of terephthaloyl chloride with α- and β-alanine in good yields. Their binding properties were investigated with various metal cations using UV–Vis titration experiments. Both isomers exhibited effective binding with Ag+, Cu2+, Hg2+, Pb2+, Fe2+ and Fe3+ cations. However, in the presence of other cations, such as Na+, Ni2+, Co2+, Cd2+, Zn2+, Mn2+, Mg2+, Ca2+, Sn2+, Al3+, and anions tetrabutylammonium Cl− and H2PO4 −, no interaction occurred. Both isomers displayed similar trends towards binding with metal cations.
ISSN:1752-153X