Synthesis of symmetrical and unsymmetrical benzoylthiourea ligand as potential chemosensor for selective determination of Cu(II) ion / Nurul Asma Hamedan

Design of a new specific colorimetric and fluorescence chemosensor for detection of Cu2+ is a challenge in the context of interference from coexisting metal ions in an aqueous solution. Therefore, new chemosensor were synthesized: symmetrical (LI, L2, L3) and unsymmetrical (L4, L5, L6, L7) benzoylth...

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Main Author:	Hamedan, Nurul Asma
Format:	Thesis
Language:	English
Published:	2018
Subjects:	Special processes and operations
Online Access:	https://ir.uitm.edu.my/id/eprint/79465/1/79465.pdf
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spelling	my-uitm-ir.794652023-09-08T08:13:11Z Synthesis of symmetrical and unsymmetrical benzoylthiourea ligand as potential chemosensor for selective determination of Cu(II) ion / Nurul Asma Hamedan 2018 Hamedan, Nurul Asma Special processes and operations Design of a new specific colorimetric and fluorescence chemosensor for detection of Cu2+ is a challenge in the context of interference from coexisting metal ions in an aqueous solution. Therefore, new chemosensor were synthesized: symmetrical (LI, L2, L3) and unsymmetrical (L4, L5, L6, L7) benzoylthiourea ligand. The symmetrical ligands were synthesized by the reaction of benzoyl isothiocyanate with diethylenetriamine (2:1). The unsymmetical ligands were synthesized involving two steps. The first step was undergoing 1:1 condensation of 4- dimethylaminobenzaldehyde with diethylenetriamine. The reaction was completed by adding benzoyl isothiocyanate to form unsymmetrical ligands. All ligands were characterized by using Elemental Analysis (EA), Fourier Transform Infrared (FTIR) spectroscopy and proton Nuclear Magnetic Resonance (*H NMR) spectroscopy. For application, further study on selectivity, sensitivity, stoichiometry, binding constant, and the competition of ligands were conducted. Ultraviolet visible spectroscopy (UV Vis) was used to study the symmetrical ligands and fluorescent emission spectroscopy (FES) was applied for all unsymmetrical ligands. All ligands showed more selective towards Cu than other metal ions (Fe , Co , Ni , Mn , Cr and Zn ). However, only L4 shows selective towards both Fe3+ and Cu2+ ions which is not a selective sensor. In conclusion, LI is more sensitive (6.2 x 10"6 M) than L2 (1.5 x 10"6 M) and L3 (1.15 x 10"5 M) by forming a stable 1:2 (metal:ligand) complexes while for unsymmetrical ligand, L7 (9.7 x 10"6 M) is more sensitive than L5 (1.46 x 10"5 M) and L6 (9.7 x 10"5 M) by forming 2:1 (metal:ligand) complexes. 2018 Thesis https://ir.uitm.edu.my/id/eprint/79465/ https://ir.uitm.edu.my/id/eprint/79465/1/79465.pdf text en public masters Universiti Teknologi MARA (UiTM) Faculty of Applied Sciences Hasan, Sharizal
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Hasan, Sharizal
topic	Special processes and operations
spellingShingle	Special processes and operations Hamedan, Nurul Asma Synthesis of symmetrical and unsymmetrical benzoylthiourea ligand as potential chemosensor for selective determination of Cu(II) ion / Nurul Asma Hamedan
description	Design of a new specific colorimetric and fluorescence chemosensor for detection of Cu2+ is a challenge in the context of interference from coexisting metal ions in an aqueous solution. Therefore, new chemosensor were synthesized: symmetrical (LI, L2, L3) and unsymmetrical (L4, L5, L6, L7) benzoylthiourea ligand. The symmetrical ligands were synthesized by the reaction of benzoyl isothiocyanate with diethylenetriamine (2:1). The unsymmetical ligands were synthesized involving two steps. The first step was undergoing 1:1 condensation of 4- dimethylaminobenzaldehyde with diethylenetriamine. The reaction was completed by adding benzoyl isothiocyanate to form unsymmetrical ligands. All ligands were characterized by using Elemental Analysis (EA), Fourier Transform Infrared (FTIR) spectroscopy and proton Nuclear Magnetic Resonance (*H NMR) spectroscopy. For application, further study on selectivity, sensitivity, stoichiometry, binding constant, and the competition of ligands were conducted. Ultraviolet visible spectroscopy (UV Vis) was used to study the symmetrical ligands and fluorescent emission spectroscopy (FES) was applied for all unsymmetrical ligands. All ligands showed more selective towards Cu than other metal ions (Fe , Co , Ni , Mn , Cr and Zn ). However, only L4 shows selective towards both Fe3+ and Cu2+ ions which is not a selective sensor. In conclusion, LI is more sensitive (6.2 x 10"6 M) than L2 (1.5 x 10"6 M) and L3 (1.15 x 10"5 M) by forming a stable 1:2 (metal:ligand) complexes while for unsymmetrical ligand, L7 (9.7 x 10"6 M) is more sensitive than L5 (1.46 x 10"5 M) and L6 (9.7 x 10"5 M) by forming 2:1 (metal:ligand) complexes.
format	Thesis
qualification_level	Master's degree
author	Hamedan, Nurul Asma
author_facet	Hamedan, Nurul Asma
author_sort	Hamedan, Nurul Asma
title	Synthesis of symmetrical and unsymmetrical benzoylthiourea ligand as potential chemosensor for selective determination of Cu(II) ion / Nurul Asma Hamedan
title_short	Synthesis of symmetrical and unsymmetrical benzoylthiourea ligand as potential chemosensor for selective determination of Cu(II) ion / Nurul Asma Hamedan
title_full	Synthesis of symmetrical and unsymmetrical benzoylthiourea ligand as potential chemosensor for selective determination of Cu(II) ion / Nurul Asma Hamedan
title_fullStr	Synthesis of symmetrical and unsymmetrical benzoylthiourea ligand as potential chemosensor for selective determination of Cu(II) ion / Nurul Asma Hamedan
title_full_unstemmed	Synthesis of symmetrical and unsymmetrical benzoylthiourea ligand as potential chemosensor for selective determination of Cu(II) ion / Nurul Asma Hamedan
title_sort	synthesis of symmetrical and unsymmetrical benzoylthiourea ligand as potential chemosensor for selective determination of cu(ii) ion / nurul asma hamedan
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	Faculty of Applied Sciences
publishDate	2018
url	https://ir.uitm.edu.my/id/eprint/79465/1/79465.pdf
_version_	1783736282171572224

Synthesis of symmetrical and unsymmetrical benzoylthiourea ligand as potential chemosensor for selective determination of Cu(II) ion / Nurul Asma Hamedan

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