Optically responsive switches: understanding and improving photochromic properties

Thomas Pijper

Research output: ThesisThesis fully internal (DIV)

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Abstract

Photochromic molecular switches are molecules that can be switched back and forth between two or more isomers by irradiating with light whereby these isomers have different colors. The phenomenon of photochromism has received much interest from researchers because of its potential applications. This is because, in addition to a color change, photochromic switching takes place with a change in various other molecular characteristics such as shape, conductivity, redox potential, and polarity. This creates many possible ways in which the switch can interact with its environment and allows for the design of large molecular systems that can be influenced by means of irradiation with light. The main topics described in this thesis are:
- the photochemical behavior of an asymmetric dithienylethene molecular switch in solution;
- the surface immobilization of symmetric and asymmetric dithienylethene switches, which is found to result in a large change in the photochemical behavior of the asymmetric switches;
- the synthesis and surface immobilization of a dithienylethene switch with a tripodal anchoring group that is designed to limit interactions between the switch and the surface;
- the use of a chiral dithienylethene switch as a dopant in a liquid crystal, which leads to the formation of a chiral (helical) phase with a pitch that can be influenced with light;
- the investigation of a computational method for studying the thermally driven isomerization of sterically overcrowded alkenes and second-generation molecular motors.
Translated title of the contributionOptisch responsieve schakelaars: het begrijpen en verbeteren van fotochromische eigenschappen
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • University of Groningen
Supervisors/Advisors
  • Feringa, Ben L., Supervisor
  • van Wees, Bart, Supervisor
  • Browne, Wesley, Supervisor
Award date11-May-2015
Place of Publication[Groningen]
Publisher
Print ISBNs9789036778305
Electronic ISBNs9789036778299
Publication statusPublished - 2015

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