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A Spectroscopic Study in Solution and Solid States: Synthesis, Spectroscopic and Thermal Studies on Intermolecular Charge-Transfer Complexes Associated with the In Situ Reaction of Triamterene Drug with σ- and π-Electron Acceptors

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Triamterene (TM) is an important diuretic medication used to treat edema caused by various conditions, including liver and heart disease. Triamterene is a good donating drug containing seven nitrogen atoms, out of which three are found as –NH2 terminal groups and the other four atoms are involved in aromatic rings as 6-phenylpteridine moiety. This study focused on the spectroscopic investigation of electron transfer associated with the reaction between TM pure drug and two different types of electron acceptors, namely iodine, a σ-acceptor, and 7,7,8,8-tetracyanoquinodimethane (TCNQ), a π-acceptor. The morphological features of the associated charge-transfer (CT) complexes were examined using scanning and transmission electron microscopy. The spectroscopic characteristics of the CT complexes in both solid and solution states were examined using UV-visible (UV/Vis), Fourier transform infrared (FTIR) spectroscopy, proton nuclear magnetic resonance (1H-NMR) spectroscopy and elemental analyses. FTIR bands were interpreted and confirmed that the interaction between TM and iodine or TCNQ acceptors occurs through the electron lone pair on the nitrogen atom of the –NH2 group and the benzene ring of the donor to the acceptor molecule with donor: acceptor molar ratio of 1:2.
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Keywords: CHARGE-TRANSFER; IODINE; SPECTROSCOPY; TCNQ; TRIAMTERENE

Document Type: Research Article

Publication date: September 1, 2019

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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