PhD Studentship: Dynamics of Photomolecular Motors in the Gas Phase and in Solution

Project Supervisor - Dr James Bull

A PhD position is available in laser spectroscopy to probe the excited- and ground-state dynamics of next-generation photomolecular motors (PMMs). The position is based at the University of East Anglia under the supervision of Assoc. Prof. James Bull and is linked to a successful EPSRC grant. PMMs, based on overcrowded alkenes, enable the conversion of light into directional molecular motion required for microscopic machines. Coupled PMMs have demonstrated concerted, directional intramolecular rotation to support molecular translation. These dynamics are driven by successive photoisomerisation and thermal helix inversion (THI) steps. Synthetic efforts have optimised the rate of THI but often at the expense of isomerisation yield. The ultimate goal of the project is to use ultrafast spectroscopic techniques, including gas-phase methods such as tandem ion mobility mass spectrometry and time-resolved photoelectron spectroscopy, together with solution-phase transient absorption, to uncover the detailed mechanism of PMMs. This understanding will guide the rational design of improved derivatives. 

The project will focus on a series of unsymmetrical PMM derivatives containing electron-donating and electron-withdrawing groups to modify charge-transfer and polarisation effects along the reaction coordinate. Experiments will use custom-built vacuum instrumentation and high-powered laser systems to determine how environmental factors (e.g., solvent identity and viscosity) affect the dynamics (lifetimes, branching ratios) and isomerisation yield. Many of the experimental capabilities in our laboratory are unique worldwide, enabling the preparation, separation, and study of short-lived intermediates that may occur in gas-phase PMM cycles. Further details are available on our website: http://www.eigenket.org/ 

The successful candidate will receive comprehensive training and will work alongside experienced postdoctoral researchers and other research students. The project will involve small elements of computational chemistry (electronic structure calculations) to help interpret experimental observations, supported by local and national supercomputing facilities. 

Entry Requirements

Acceptable first degree subjects - Chemistry, Biochemistry, Natural Sciences, or related disciplines.

Minimum academic requirement - A 2:1 undergraduate degree with a Master’s qualification.

Mode of study

Full-time

Start date

1 October 2026

Funding Information: This PhD project is in a competition for a Faculty of Science funded studentship. Funding is available to UK applicants and comprises ‘home’ tuition fees and an annual stipend for 3 years.

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