Refernces
10.1016/j.molstruc.2010.05.038
The study presents a density functional theory (DFT) and experimental investigation of N,N'-bis(3-carboxy,4'-aminophenyl)-1,4-quinonediimine, a carboxyl-substituted aniline trimer. The research aims to understand the electronic and steric effects in co-polymers of aniline and anthranilic acid, and to explore the trimer's potential in corrosion inhibition. Chemicals used include 1,4-phenylenediamine, hydrochloric acid, ammonium persulfate, anthranilic acid, and ammonium hydroxide for the synthesis of the trimer. The synthesized trimer was then subjected to various experimental analyses, including UV-vis, near-IR, and NMR spectroscopy, to study its properties. The study also utilized computational methods to optimize the structures of the trimer's isomers and calculate their electronic properties, providing insights into the trimer's behavior in different oxidation states and solvent environments. The purpose of these chemicals was to synthesize the trimer and understand its redox properties, its ability to 'self-dope', and its effectiveness in corrosion inhibition, particularly in alkaline environments where standard oligo- and polyanilines fail.
10.1016/j.jphotochem.2018.04.026
The study focuses on the photosonoelectrochemical (PSEC) analysis of Lawsonia inermis (henna) and artificial dyes, specifically lawsone and p-Phenylenediamine (PPD), used in the tattoo and dye industry. The primary objective was to understand the degradation mechanisms and the formation of harmful byproducts when these dyes are exposed to conditions simulating those of tattoo ink application, such as UV irradiation, sonication, and electrochemical perturbations. The chemicals used in the study served various purposes: Lawsonia inermis was analyzed for its natural dye properties, lawsone as a major constituent of henna was examined for its electroactivity and degradation, and PPD, an artificial dye often added to henna for color enhancement, was assessed for its degradation products. The study aimed to demonstrate the potential harmfulness of using artificial dyes like PPD over natural dyes like henna in body art and dyeing applications.
10.1016/j.tetlet.2006.04.136
The study investigates the structure-biodistribution relationship of neutral 99mTc(CO)3-complexes with tridentate N-substituted derivatives of aminoethylglycine (EDAA) and phenylenediamine (PDAA). The researchers synthesized and characterized a series of 99mTc-tricarbonyl complexes with varying lipophilicity by modifying the amines with uncharged substituents such as methyl, ethyl, butyl, or benzyl groups. These modifications aimed to influence the biodistribution of the complexes in mice, particularly their ability to cross the blood-brain barrier (BBB). The chemicals used included ethylenediamine-N-acetic acid (EDAA) and ortho-phenylenediamine-N-acetic acid (PDAA) derivatives, which served as ligands to form neutral complexes with the 99mTc(CO)3+-moiety. The purpose of these chemicals was to create radiopharmaceuticals for potential use in diagnosing and monitoring neurological diseases, with a focus on their ability to pass the BBB and be taken up by the brain.
10.1016/j.tetlet.2004.07.085
The research focuses on the design and synthesis of novel dendritic cores based on thiacalix[4]arene derivatives, which possess potential applications in supramolecular chemistry due to their unique properties such as complexation ability towards transition metals and chemical modifiability. The purpose of the study was to overcome the steric hindrance issues encountered during the derivatization of thiacalix[4]arene derivatives to create dendritic cores with amino surface groups. The researchers successfully applied a synthetic strategy that involved the use of benzylic spacers to withdraw carboxyl groups from the thiacalix[4]arene moiety, allowing for the realization of novel thiacalix[4]arenes bearing two or four protected lysine units. Key chemicals used in the process included thiacalix[4]arene tetraacids, oxalyl chloride, mono-Boc-protected 1,2-diaminoethane, mono-Boc-protected 1,4-phenylenediamine, methyl p-bromomethylbenzoate, and CDI (1,1,3,3-tetramethyluronium chloride).
10.1016/s0022-328x(97)00456-7
The study investigates the formation of dimeric and trimeric molybdenum(II) complexes containing 2-substituted 3-bonded butadienyl bridging ligands. The starting material used is [MoCI(CO)2(@-CH2(COCI)C=CH2)phen] (phen = 1,10-phenanthroline) (1). When 1 reacts with 1,2-ethanediol or N,N'-diethylethylenediamine in a 2:1 mole ratio, dimeric complexes [MoCI(CO)2(@-CH/(COACH2)C=CH2)phen]2 are formed, where A represents the substituent group (A = O for ester, A = NEt for amide). Reactions with hydroquinone or 1,4-phenylenediamine yield monomeric complexes [MoCI(CO)2(@-CH2(COA)C=CH2)phen], while dimeric complexes are isolated from reactions involving 4,4'-ethylenedianiline or p-xylylenediamine. Attempts to prepare a novel complex bridged by three linked amide substituted butadienyl groups using diethylenetriamine were unsuccessful. However, reaction of 1 with triethanolamine or tris(2-aminoethyl)amine in a 3:1 mole ratio gives trimeric complexes [MoCI(CO)2(~/a-CH2(COACH2CH2)C=CH2)phen]3 N (A = O, NH) in good yield. The study establishes conditions for the formation of these complexes and examines the boundaries of dimer and trimer formation using various bifunctional and trifunctional reagents.
T,
N,
T+,
Xn
T:Toxic;
