Entalpije mešanja raztopin fulerenatnih soli z raztopinami enostavnih soli

Rifelj, Luka (avtor), Cerar, Janez (mentor)

V okviru magistrskega dela smo po znanem postopku sintetizirali natrijevo sol fulerenheksamalonske kisline (FHMA), ki smo jo nato z ionsko izmenjavo pretvorili v njeno kislinsko obliko. Z nevtralizacijo kisline FHMA z raztopinami alkalijskih hidroksidov smo pripravili litijevo, natrijevo in cezijevo sol FHMA (LiFHM, NaFHM in CsFHM). Raztopino LiFHM s koncentracijo 0,005 mol COO-skupin / dm3smo pri treh različnih temperaturah (5,0 ºC; 25,0 ºC; 45,0 ºC) titrirali z 0,15 molarnimi raztopinami izbranih 1:1 alkalijskih (LiCl, NaCl, CsCl) in tetraalkilamonijevih (tetrametil-, tetraetil-, tetrapropil-, in tetrabutilamonijevih) kloridov, pri tem pa smo merili izmenjano toploto (z uporabo izotermnega titracijskega kalorimetra) in (samo pri 25,0 °C) električno prevodne (konduktometer) spremembe v titriranih raztopinah.

• Jezik: Slovenski jezik
• Ključne besede: ITC, entalpija mešanja fulerenatnih soli, FHMA, konduktometrija, Onsagerjeva enačba
• Vrsta gradiva: Magistrsko delo/naloga
• Tipologija: 2.09 - Magistrsko delo
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Leto izida: 2019
• PID: 20.500.12556/RUL-108811
• COBISS.SI-ID: 1538298051
• Datum objave v RUL: 29.07.2019

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Enthalpies of mixing of fullerenate salts solutions with solutions of simple salts

Izvleček

As part of our master’s thesis a well-known procedure was used to synthesise sodium salt of fullerenehexamalonic acid (FHMA), which was then transformed into its acidicform by means of ion exchange. Lithium, sodium and caesium salts of FHMA were prepared by neutralising FHMA with solutionsof alkali hydroxides. Solution of LiFHM with concentration of 0.005mole COO-groups / dm3was titrated at three different temperatures (5.0 ºC; 25.0 ºC; 45.0 ºC) with selected alkali (LiCl, NaCl, CsCl) and tetraalkylammonium (tetramethyl-, tetraethyl-, tetrapropyl-, and tetrabutylammonium) chlorides, during which exchanged heat (by means of isothermal titration calorimeter) and (only at 25.0 ºC) electroconductivity (conductometer) changes were being measured.

• Ključne besede: ITC, enthalpies of mixing of fullerenehexamalonic salt, FHMA, conductometry, Onsager equation