Študij vezave izbranih kovinskih ionov z vinsko kislino

Jančigaj, Eva (avtor), Kočar, Drago (mentor)

Vinska kislina je organska spojina, ki jo pogosto najdemo v naravi v obliki same vinske kisline, hidrogentartrata in tartrata. Uporabljamo jo kot kiralno molekulo pri ločevanju, kot izhodno molekulo za tvorbo novih kiralnih molekul, v živilski, farmacevtski in kozmetični industriji. Kislina ima dve hidroksilni in dve karboksilni skupini, prek katerih lahko tvori komplekse z večkrat nabitimi ioni, kot sta tudi železov(III) in bakrov(II) ion. Namen magistrskega dela je bil ugotoviti, pri katerih pH pride do tvorbe kompleksov in kakšna je njihova stehiometrija. Vse to sem ugotavljala s pomočjo Jobove metode in ciklične voltametrije. Pripravila sem raztopine pri pH 1 (samo pri ciklični voltametriji), 3, 5 in 7 ter posnela njihove UV-VIS spektre in ciklične voltamograme. Iz rezultatov sem določila konstante stabilnosti in jih primerjala s teoretičnimi.

• Jezik: Slovenski jezik
• Ključne besede: železov(III) tartrat, bakrov(II) tartrat, vinska kislina, spektrofotometrija, ciklična voltametrija
• Vrsta gradiva: Magistrsko delo/naloga
• Tipologija: 2.09 - Magistrsko delo
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Leto izida: 2022
• PID: 20.500.12556/RUL-141967
• COBISS.SI-ID: 132095747
• Datum objave v RUL: 13.10.2022

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Study of binding of selected metal ions with tartaric acid

Izvleček

Tartaric acid is an organic compound often found in nature in the form of tartaric acid, hydrogentartrate and tartrate. It is used as a chiral acid for racemic resolution and as a starting material for organic synthesis of new chiral compounds. It can often be used in pharmaceutical, cosmetic and food industry as well. Tartaric acid contains two hydroxyl and two carboxylic functional groups through which it can form coordinate compounds with multiply-charged ions such as iron(III) and copper(II) ion. The goal of the master's thesis was to determine the stoichiometry and the pH values of solutions in which coordinate compounds can be formed. This was done using the Job's method and cyclic voltammetry. Solutions of pH 1 (only for cyclic voltammetry), 3, 5 and 7 were prepared and the corresponding UV-VIS spectra and cyclic voltammograms were scanned. Out of all collected data stability constants were calculated and compared to theoretical values.

• Ključne besede: iron(III) tartrate, copper(II) tartrate, tartaric acid, spectrophotometry, cyclic voltammetry