University of Jyväskylä | JYX Digital Repository

  • English  | Give feedback |
    • suomi
    • English
 
  • Login
JavaScript is disabled for your browser. Some features of this site may not work without it.
View Item 
  • JYX
  • Opinnäytteet
  • Väitöskirjat
  • View Item
JYX > Opinnäytteet > Väitöskirjat > View Item

Gelation and gel properties of two- and three-component pyrene based low molecular weight organogelators

Thumbnail
View/Open
5.2 Mb

Downloads:  
Show download detailsHide download details  
Published in
Research report / Department of Chemistry, University of Jyväskylä
Authors
Leivo, Kimmo
Date
2011
Discipline
Kemia

 
The research described in this thesis covers the synthesis, characterization and the study of the gelation ability of fteen pyrene based low molecular weight organogelators (LMOGs). The gelation and gel properties were investigated by rheometry, scanning electron microscopy, di erential scanning calorimetry, UV-Vis and uorescence spectroscopy. The pyrene based LMOGs form complexes with 2,4,7-trinitro uorenone (TNF) and self-assemble non-covalently through - stacking, donor-acceptor and van der Waals interactions to form thermoreversible gels, which remain stable at least for two years. The strongest gels were obtained in primary alcohols whereas the poor solubility of TNF restricted gelation in nonpolar hydrocarbons. It was observed that the gelation behavior of the two-component gelator system can be estimated in both nonpolar and polar solvents by using the Hansen solubility parameters and distance. The unknown solubility parameters of the gelators were estimated by a group contribution method. The gelation ability of the two-component system was found to correlate with the hydrogen bonding solubility parameter of the solvent. Electron microscopy showed that the gelation occurs due to self-assembly of the gelators into long gel bers that form an entangled gel network. The solvent and the structure of the pyrene based LMOG have a large e ect on the gel structure and; consequently, the properties. The gels with less ber bundles and denser gel network were more elastic and had higher stability and viscosity. The organogels are viscoelastic soft materials showing shear thinning behavior and a yield point. The e ect of the solvent, additives like pyrene, crosslinker molecule and aluminum nanoparticles, functionality and alkyl side chain length of the pyrene based gelator on the gel properties were studied by rheometry. The results of this work indicate that two- and three-component gelator systems open wide possibilities to control the gel properties in various solvents. ...
Publisher
University of Jyväskylä
ISBN
978-951-39-4232-8
ISSN Search the Publication Forum
0357-346X
Keywords
gelator organogelator gel rheology low molecular weight organogelator self-assembly solubility parameters scanning electron microscopy fysikaalinen kemia geelit
URI

http://urn.fi/URN:ISBN:978-951-39-4232-8

Metadata
Show full item record
Collections
  • Väitöskirjat [3079]

Related items

Showing items with similar title or keywords.

  • DNA-based applications in molecular electronics 

    Linko, Veikko (University of Jyväskylä, 2011)
    This thesis is mainly focused on DNA molecules and especially on self-assembled DNA constructs and their potential applications in nanotechnology and molecular electronics. In the field of molecular electronics the ...
  • Phase-selective low molecular weight organogelators derived from allylated D-mannose 

    Mattsson, Ida; Lahtinen, Manu; Sitdikov, Ruzal; Wank, Bianca; Saloranta-Simell, Tiina; Leino, Reko (Elsevier BV, 2022)
    In the last decades, synthesis and design of low molecular weight organogelators has gained increasing attention due to their versatile use in, for example, cosmetics, biomedicine and oil spill remediation. In this work, ...
  • Multivalent N-donor ligands for the construction of coordination polymers and coordination polymer gels 

    Tatikonda, Rajendhraprasad (University of Jyväskylä, 2018)
    This work describes the synthesis and characterisation of several multivalent N-donor ligands and their coordination compounds and the use of these ligands in the construction of coordination polymers and coordination ...
  • Nanodevices by DNA based gold nanostructures 

    Tapio, Kosti (University of Jyväskylä, 2017)
    In this thesis DNA based structures were utilized to create gold nanostructures for nanosensing and nanoelectronic applications. In the past, both of these fields have been dominated by the conventional lithography methods, ...
  • A Multi‐Component Reaction towards the Development of Highly Modular Hydrogelators 

    Sundén, Henrik; Sauvée, Claire; Haukka, Matti; Stöm, Anna (Wiley, 2018)
    Herein we report a multi‐component reaction approach for the development of a new class of hydrogelators based on the OxoTriphenylHexanOate (OTHO) backbone. A focused library of OTHOs has been synthesized and their ...
  • Browse materials
  • Browse materials
  • Articles
  • Conferences and seminars
  • Electronic books
  • Historical maps
  • Journals
  • Tunes and musical notes
  • Photographs
  • Presentations and posters
  • Publication series
  • Research reports
  • Research data
  • Study materials
  • Theses

Browse

All of JYXCollection listBy Issue DateAuthorsSubjectsPublished inDepartmentDiscipline

My Account

Login

Statistics

View Usage Statistics
  • How to publish in JYX?
  • Self-archiving
  • Publish Your Thesis Online
  • Publishing Your Dissertation
  • Publication services

Open Science at the JYU
 
Data Protection Description

Accessibility Statement

Unless otherwise specified, publicly available JYX metadata (excluding abstracts) may be freely reused under the CC0 waiver.
Open Science Centre