Change search
CiteExportLink to record
Permanent link

Direct 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
Synthesis and Characterization of a 3-Arm Star Platinum(II) Acetylide Chromophore Targeted for Optical Limiting Applications
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
Show others and affiliations
(English)In: Organometallics, ISSN 0276-7333, E-ISSN 1520-6041Article in journal (Other academic) Submitted
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-9174OAI: oai:DiVA.org:kth-9174DiVA: diva2:25568
Note
QS 20120328Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2012-03-28Bibliographically approved
In thesis
1. Nonlinear Absorbing platinum(II) Acetylides for Optical Power Limiting Applications
Open this publication in new window or tab >>Nonlinear Absorbing platinum(II) Acetylides for Optical Power Limiting Applications
2008 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

During the past few decades, laser technology has had a strong impact on our society, providing important contributions to materials processing, data storage, communications, medicine, and defense applications. However, the progress in laser technology has also brought about the development of harmful portable high‐power lasers and tactical laser weapons. As a result, the hazard of being blinded by lasers (accidentally or from hostile use) has increased significantly. Hence, the need for protection against lasers has emerged. In order to protect optical sensors against harmful laser radiation, materials that absorb high intensity light, such as nonlinear absorbing chromophores, are employed. The concept of controlling the intensity of an optical light beam is usually referred to as optical power limiting and can be used efficiently in sensor protection devices.In this thesis, various nonlinear absorbing platinum(II) acetylides have been synthesized and characterized regarding their photophysical and optical limiting properties. Dendronized platinum(II) acetylides were prepared in order to evaluate the site isolation effect offered by the dendritic surrounding. The photophysical measurements reveal that the dendritic encapsulation enhances the phosphorescence, increases the luminescence lifetimes, and improves the optical limiting performance due to reduced quenching of the excited states.Triazole‐containing chromophores were synthesized using click chemistry to achieve functionalized platinum(II) acetylides. It was found that the position of the triazole unit affects the photophysical properties of these chromophores. The most promising results were obtained for the chromophore with the triazole located at the end of the conjugation where it may act as an electron donor, thus contributing to improved two‐photon absorption.A branched platinum(II) acetylide was also prepared in order to investigate the effect of multiple conjugated arms as well as multiple heavy atoms within the same molecule on the optical limiting performance. The star shaped chromophore reached the lowest clamping level of all compounds included in this thesis and constitutes a highly suitable chromophore for optical power limiting applications.The nonlinear absorbing chromophores were also incorporated into novel solid state materials based on PMMA. The actual device fabrication of doped organic glasses as optical limiters for sensor protection is presented, and their optical limiting performance is reported. The obtained organic glasses can reduce the transmission of high intensity light by 97 %.

Place, publisher, year, edition, pages
Stockholm: KTH, 2008. 73 p.
Series
Trita-CHE-Report, ISSN 1654-1081 ; 2008:59
Keyword
optical power limiting
National Category
Polymer Chemistry
Identifiers
urn:nbn:se:kth:diva-9169 (URN)978-91-7415-102-2 (ISBN)
Public defence
2008-10-03, F3, Lindstedtsvägen 26, Stockholm, 10:15 (English)
Opponent
Supervisors
Note
QC 20100920Available from: 2008-09-30 Created: 2008-09-29 Last updated: 2010-09-20Bibliographically approved

Open Access in DiVA

No full text

Authority records BETA

Malmström, Eva E.

Search in DiVA

By author/editor
Westlund, RobertVestberg, RobertMalmström, Eva E.
By organisation
Fibre and Polymer Technology
In the same journal
Organometallics
Polymer Chemistry

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 72 hits
CiteExportLink to record
Permanent link

Direct 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