Vpliv ß-ciklodekstrina na kinetiko in mehanizem reakcije umiljenja etilacetata : doktorska disertacija

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Vpliv ß-ciklodekstrina na kinetiko in mehanizem reakcije umiljenja etilacetata : doktorska disertacija

Petek, Anja, biokemija

Ciklodekstrini (CD) so v zadnjih letih pritegnili pozornost raziskovalcev zaradi svoje potencialne uporabe kot »molekularni reaktorji«, ki omogočajo izvedbo organskih reakcij v vodnih raztopinah ... (zelene tehnologije). So ciklični oligosaharidi, ki nastanejo pri encimski razgradnji škroba. Imajo obliko prisekanega stožca s hidrofobno notranjostjo in primarnimi ter sekundarnimi OH skupinami nameščenimi na zunanjih straneh odprtine. Zunanja površina CD je hidrofilna, zaradi česar so relativno dobro topni v vodi. Hidrofobna notranjost pa omogoča vključitev hidrofobnih molekul v notranjost CD, nastane vključitveni kompleks gostitelj-gost. Gostujoče molekule so v kompleks vezane samo na osnovi van der Waalsovih sil, brez tvorbe kovalentnih vezi, pri čemer se spremenijo fizikalne lastnosti in kemijska reaktivnost. Poznavanje mehanizma nastanka CD kompleksa in njegovega vpliva na potek reakcije je tako ključnega pomena. V doktorski disertaciji smo na modelnem sistemu alkiltrimetilamonijevih bromidov raziskali vpliv van der Waalsovih sil in hidrofobnega efekta. Proces micelizacije smo proučevali z merjenjem specifične prevodnosti in iz na lasten način izpeljanega pseudo-faznega modela določili termodinamske parametre: standardno prosto Gibbsovo energijo (∆G0mic), entalpijo (∆H0mic) in entropijo (∆S0mic) micelizacije ter jih analizirali kot funkcijo povečanja dolžine alkilne verige in temperature. Rezultati kažejo, da je micelizacija termodinamsko ugoden proces (∆G0mic

Type of material - dissertation ; adult, serious

Publication and manufacture - Maribor : [A. Petek], 2022

Language - slovenian

COBISS.SI-ID - 118101507

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Digital Library of the University of Maribor – DLUM
Digitalna knjižnica Slovenije - dLib.si

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Author
Petek, Anja, biokemija

Other authors
Krajnc, Majda | Bren, Urban

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GS II 746436 glavno skladišče	available - reading room

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Year	Impact factor		Edition		Category		Classification
Year	JCR	SNIP	JCR	SNIP	JCR	SNIP	JCR	SNIP

Links to authors' personal bibliographies	Links to information on researchers in the SICRIS system
Petek, Anja, biokemija	39608
Krajnc, Majda	03466
Bren, Urban	25434

Source: Personal bibliographies and: SICRIS

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