Change search
Refine search result
1 - 8 of 8
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the 'Create feeds' function.
  • 1.
    Dahlstedt, Emma
    et al.
    KTH, Superseded Departments, Chemistry.
    Hellberg, Jonas S. E.
    KTH, Superseded Departments, Chemistry.
    Petoral, R M
    Uvdal, K
    Synthesis of tetrathiafulvalenes suitable for self-assembly applications2004In: Journal of Materials Chemistry, ISSN 0959-9428, E-ISSN 1364-5501, Vol. 14, no 1, p. 81-85Article in journal (Refereed)
    Abstract [en]

    A series of new tetrathiafulvalenes, with double alkylthiol or alkyldisulfide substitution, have been prepared with a synthetic procedure that allows variation of different substituents. The target compounds 6a-e and 15e-i are sparsely soluble in organic solvents, but TTFs 6d and 15g gave a relatively dense packed monolayer upon exposure to gold surfaces.

  • 2. Friedlein, R
    et al.
    Crispin, X
    Osikowicz, W
    Braun, S
    de Jong, M P
    Simpson, C D
    Watson, M D
    von Kieseritzky, Fredrik
    KTH, Superseded Departments, Chemistry.
    Samori, P
    Jonsson, S K M
    Fahlman, M
    Jackel, F
    Rabe, J P
    Hellberg, Jonas
    KTH, Superseded Departments, Chemistry.
    Mullen, K
    Salaneck, W R
    Surface-induced vertical alignment of self-assembled supramolecular columns of large polycyclic aromatic hydrocarbons and porphyrins2004In: Synthetic metals, ISSN 0379-6779, E-ISSN 1879-3290, Vol. 147, no 1-3, p. 79-83Article in journal (Refereed)
    Abstract [en]

    Ordered films of polycyclic aromatic hydrocarbons (PAHs) and porphyrins with functional (e.g. thiophene) side-groups are good candidates for (opto-)electronic applications where fast charge separation and transport are required. Such highly ordered thin films of PAHs, including discotic hexa-peri-hexabenzocoronene (HBC) and C-132-C-16,C-4, as well as brominated functionalized porphyrin molecules have been grown from solutions on semi-metallic molybdenum disulfide substrates and characterized by angle-resolved valence band photoelectron spectroscopy. A vertical growth of self-assembled supramolecular columns perpendicular to the basal plane of the substrate along with their lateral ordering on the surface has been achieved. Annealing made it possible to increase the structural order in the HBC columns, with molecules positioned at a regular offset from the columnar axis. This permitted the formation of extended pi-electronic states with a bandwidth of at least 0.1-0.2 eV at room temperature.

  • 3. Friedlein, R
    et al.
    von Kieseritzky, Fredrik
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Braun, S
    Linde, C
    Osikowicz, W
    Hellberg, Jonas S. E.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Salaneck, W R
    Solution-processed, highly-oriented supramolecular architectures of functionalized porphyrins with extended electronic states2005In: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, no 15, p. 1974-1976Article in journal (Refereed)
    Abstract [en]

    Thin films of aligned supramolecular architectures built from newly synthesized thiophene-substituted porphyrins have been processed from solution on surfaces.

  • 4.
    Hellberg, Jonas
    et al.
    KTH, Superseded Departments, Chemistry.
    Dahlstedt, Emma
    KTH, Superseded Departments, Chemistry.
    Pelcman, Margit
    KTH, Superseded Departments, Chemistry.
    Synthesis of annulated dioxins as electron-rich donors for cation radical salts2004In: Tetrahedron, ISSN 0040-4020, E-ISSN 1464-5416, Vol. 60, no 40, p. 8899-8912Article in journal (Refereed)
    Abstract [en]

    The synthesis of a series of new alkoxylated linearly annulated dioxins is described together with their cyclic voltammetric behavior and some preliminary result on their ability to form cation radical salts. Of these dioxins, seven (8, 12, 19, 21, 27, 33, 34) are the first representatives of entirely new heterocyclic systems. Dioxins 8, 21, 22 and 27 gave good quality cation radical salts upon electrocrystallization.

  • 5.
    Hellberg, Jonas
    et al.
    KTH, Superseded Departments, Chemistry.
    Dahlstedt, Emma
    KTH, Superseded Departments, Chemistry.
    Woldegiorgis, Andreas
    KTH, Superseded Departments, Chemistry.
    Umpolung of the 5-alkyl-2-dimethylamino-1,3-dithiolium-4-thiolate mesoion and its application in the synthesis of some new tetrathiafulvalenes2004In: European Journal of Organic Chemistry, ISSN 1434-193X, E-ISSN 1099-0690, no 7, p. 1455-1463Article in journal (Refereed)
    Abstract [en]

    The 5-alkyl-2-dimethylamino-1,3-dithiolium-4-thiolate mesoion could be umpoled with sulfuryl chloride to yield a dicationic electrophile 3 that reacted with various electron-rich aromatic substrates to yield arylthio-substituted 1,3-dithiolium salts 13-25. Two of these compounds have been transformed to the corresponding symmetrical tetrathiafulvalenes 43 and 44, and their cyclovoltammetric behaviour recorded.

  • 6. Petoral, Rodrigo M.
    et al.
    Wermelin, Karin
    Dahlstedt, Emma
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Hellberg, Jonas S. E.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Uvdal, Kajsa
    Adsorption of n-butyl-substituted tetrathiafulvalene dodecanethiol on gold2005In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 287, no 2, p. 388-393Article in journal (Refereed)
    Abstract [en]

    Tetrathiafulvalene (TTF) derivative substituted with two butyl- and two dodecylthiol chains is adsorbed on polycrystalline gold. The TTF-derived thiol adsorbates were characterized by ellipsometry, contact angle goniometry, infrared and X-ray photoelectron spectroscopy and cyclic voltammetry. The molecule is strongly anchored on the gold surface through the sulfur terminating the alkylthiol chains. On the average, the TTF moiety is oriented extended away from the gold surface. The topmost layer of the film containing the dibutyl chains is disordered with gauche defects. The molecule was organized with majority of the alkylthiol chains bound to the gold surface. There are indications of pinholes in the monolayer due to steric hindrance of the bulky TTF rings. The molecular systems consisting of an electroactive pi-system such as TTF, are promising for thin-film field effect transistor application.

  • 7.
    von Kieseritzky, Fredrik
    et al.
    KTH, Superseded Departments, Chemistry.
    Allared, Fredrik
    KTH, Superseded Departments, Chemistry.
    Dahlstedt, Emma
    KTH, Superseded Departments, Chemistry.
    Hellberg, Jonas
    KTH, Superseded Departments, Chemistry.
    Simple one-step synthesis of 3,4-dimethoxythiophene and its conversion into 3,4-ethylenedioxythiophene (EDOT)2004In: Tetrahedron Letters, ISSN 0040-4039, E-ISSN 1359-8562, Vol. 45, no 31, p. 6049-6050Article in journal (Refereed)
    Abstract [en]

    3,4-Dimethoxythiophene (2) was synthesized in one-step front readily available bulk chemicals via a ring closure reaction, and was then trans-etherified with ethylene glycol to give 3,4-ethylenedioxythiophene (3) (EDOT).

  • 8.
    Woldegiorgis, Andreas
    et al.
    KTH, Superseded Departments, Chemistry.
    von Kieseritzky, Fredrik
    KTH, Superseded Departments, Chemistry.
    Dahlstedt, Emma
    KTH, Superseded Departments, Chemistry.
    Hellberg, Jonas
    KTH, Superseded Departments, Chemistry.
    Brinck, Tore
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry (closed 20110630).
    Roeraade, Johan
    KTH, Superseded Departments, Chemistry.
    Polymer-assisted laser desorption/ionization analysis of small molecular weight compounds2004In: Rapid Communications in Mass Spectrometry, ISSN 0951-4198, E-ISSN 1097-0231, Vol. 18, no 8, p. 841-852Article in journal (Refereed)
    Abstract [en]

    The use of non-polar, small polymers as matrices for the analysis of low molecular weight compounds in polymer-assisted laser desorption/ionization mass spectrometry (PALDI-MS) is demonstrated. The matrices evaluated were either based on an oligothiophene or a benzodioxin backbone. Metallocenes, polycyclic hydrocarbons, a fluorosurfactant, and a subset of small organic compounds with various functionalities, served as model analytes. The mechanism of ionization charge transfer is discussed and ionization potentials for the matrices in the study have been estimated using density functional theory (DFT) calculations. Some of the results are possibly contradictory to the generally accepted limiting conditions for gas-phase charge-transfer reactions. These results are interpreted in the light of energy pooling. Also a new mass calibration procedure for the lowmass region in positive ion mode is presented, and some aspects of the ionization/desorption process leading to radical cations are studied.

1 - 8 of 8
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf