diplomsko delo
Alenka Zupančič (Author), Janez Cerar (Mentor)

Abstract

Vodikova vez je privlačna interakcija med vodikovim atomom molekule ali molekulskega fragmenta X-H, kjer je X bolj elektronegativen kot vodik, in atomom ali skupino atomov iste ali različne molekule, kjer obstaja dokaz za tvorbo take vezi.Jakost vodikovih vezi je odvisna od lokalnega okolja. Vodikove vezi narekujejo lastnosti marsikateri snovi.Najbolj znan sistem z vodikovimi vezmi je voda. Anomalije se v vodi pojavijo ravno zaradi vodikovih vezi. Voda je odlično topilo za ionske in polarne spojine. Prisotnost ionov v vodni raztopini vpliva tudi na jakost vodikove vezi med molekulami vode. Vodikova vez je pomembna interakcija tudi v bioloških sistemih. Poleg hidrofobnih interakcij ima ključno vlogo pri zvijanju proteinov in ohranjanju nativne strukture. Z vodikovimi vezmi so med sabo povezane dušikove baze v molekuli DNA, zaradi česarse molekula zvije v obliko dvojne vijačnice.V zadnjem času so predmet mnogih raziskav hidrogeli, kjer je vodikova vez ena izmed pomembnejših interakcij. Razvili so tudi nekaj močnih hidrogelov, kjerso ključne interakcije prav vodikove vezi.

Keywords

kemijske vezi;vodikova vez;voda;anomalije vode;vodne raztopine;hidrogeli;diplomska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [A. Zupančič]
UDC: 544.142.4(043.2)
COBISS: 1538508739 Link will open in a new window
Views: 1322
Downloads: 385
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Other data

Secondary language: English
Secondary title: Hydrogen bonding in aqueous solutions
Secondary abstract: The hydrogen bond is an attractive interaction between a hydrogen atom from a molecule or a molecular fragment X-H in which X is more electronegative than H, and an atom or a group of atoms in the same or a different molecule, in which there is evidence ofbond formation. Strengthof hydrogen bonds depends on local environment.Hydrogen bonds have a significant impactonthe properties of many substances. The most famoussystem with hydrogen bonds is water. Anomalies occur in the water due to occurrenceof hydrogen bonds. Water is an excellent solvent for ionic and polar compounds. The presence of ions in the aqueous solution also affects the strength of the hydrogen bond between the water molecules.Hydrogen bonding is also an important interaction in biological systems. In addition to hydrophobic interactions, it plays a key role in protein folding and maintaining native structure. In DNA molecule, the nitrogenous bases are linked to each other with hydrogen bonds, which causes the moleculeto twist into double helix.Recently, the hydrogels have been the subject of many researches, where the hydrogen bond is one of the most important interactions. Some strong hydrogels were developed, where the key interactions are hydrogen bonds.
Secondary keywords: hydrogen bond;water;aqueous solutions;hydrogels;
Type (COBISS): Bachelor thesis/paper
Study programme: 1000373
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, UNI Kemija
Pages: 44 str.
ID: 11342857