Ispitivanje mehaničkog odziva kristala bakrovih(II) halogenida s metilnim derivatima piridina

master's thesis

• Title (english): Exploring mechanical responsiveness of crystals of copper(II) bromides and methyl derivatives of pyridine
• Author: Andrea Mihal
• Mentor: Marijana Đaković (mentor)
• Committee member: Marijana Đaković (predsjednik povjerenstva)
• Committee member: Davor Kovačević (član povjerenstva)
• Committee member: Ivan Kodrin (član povjerenstva)
• Committee member: Biserka Prugovečki (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2022-04-14, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

U okviru ovog diplomskog rada sintetizirani su koordinacijski polimeri bakrovih(II) klorida (1)
i bakrovih(II) bromida (2) s 3-metilpiridinom (3-Mepy, a) i 4-metilpiridinom (4-Mepy, b).
Priređeni spojevi [CuCl2(3-Mepy)2]n (1a), [CuCl2(4-Mepy)2]n (1b), [CuBr2(3-Mepy)2]n (2a) i
[CuBr2(4-Mepy)2]n (2b) sintetizirani su i kristalizirani metodom tekućinske difuzije uz
primjenu različitih otapala, metanola, etanola i izopropanola. Nastali produkti okarakterizirani
su infracrvenom spektroskopijom (IR), termičkim metodama (TG/DSC) i metodom difrakcije
rendgenskih zraka u polikristalnom uzorku (PXRD), dok su metodom difrakcije rendgenskog
zračenja u monokristalnom uzorku (SCXRD) određene njihove molekulske i kristalne
strukture. Ispitan je odziv igličastih kristala priređenih spojeva na primjenu vanjske mehaničke
sile, te je uočeno da su kristali spojeva 1a, 2a i 2b plastični, a kristali spoja 1b elastični te je
njihov mehanički odziv kvantificiran. Pokazalo se da male razlike u geometriji te posljedično i
jakosti vodikovih veza ostvarenih u kristalnim strukturama priređenih spojeva imaju značajan
utjecaj na vrstu mehaničkog odziva njihovih jediničnih kristala.

Abstract (english)

This master thesis presents syntheses of coordination polymers of copper(II) chloride (1) and
copper(II) bromide (2) with 3-methylpyridine (3-Mepy, a) and 4-methylpyridine (4-Mepy, b).
Complexes [CuCl2(3-Mepy)2]n (1a), [CuCl2(4-Mepy)2]n (1b), [CuBr2(3-Mepy)2]n (2a) and
[CuBr2(4-Mepy)2]n (2b) were synthesized and crystallized via the layering technique using
different solvents, methanol, ethanol, and isopropanol. The resulting compounds were
characterized by infrared spectroscopy (IR), thermal methods (TG/DCS), and powder X-ray
diffraction (PXRD), while the single-crystal X-ray diffraction (SCXRD) method was used to
determine their molecular and crystal structures. Crystals of all prepared complexes were
subjected to the application of mechanical force and their responses were mapped out. Crystals
of 1a, 2a, and 2b were plastically deformable, while crystals of 1b were elastically responsive
and their responses were quantified. It was observed that slight differences in the geometry and
consequently the strength of the hydrogen bonds that materialized in the crystal structures of
prepared compounds have a substantial impact on the type of mechanical responses.

• Keywords: elastičnost; koordinacijski spojevi bakra(II); plastičnost; vodikova veza
• Keywords (english): copper(II) coordination compounds; elasticity; hydrogen bond; plasticity
• Language: croatian
• URN:NBN: urn:nbn:hr:217:458479
• Project: Number: IP-2019-04-1242; Title: Od oblika do funkcije: Fleksibilni kristalni materijali s kontroliranim mehaničkim odzivom; Title: From form to function: Mechanically flexible crystalline materials with controllable responses; Acronym: FlexibleCrystals; Leader: Marijana Đaković; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Study programme: Title: Graduate university studies in chemistry; specializations in: Research programme; Course: Research programme; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2024-04-14
• Created on: 2022-05-03 15:50:40