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  • Fig. 2 Estimated charge distribution changes on the APTS photoacid and conjugate photobase forms, showing major changes in Mulliken charges and in the electric dipole moment upon electronic excitation. An ultrafast X-ray glance into photoacid electronic structure 2022-03-30 Photoacids are molecules that release a proton upon electronic excitation, thus enhancing the acidity of a liquid. Pioneering work by Theodor Förster has shown the direct relationship between the wavelength position of optical absorption and acidity properties with which the increase in acidity in the first electronic excited state can be quantified.

16 profile research areas at Stockholm University

Stockholm University is a prominent research university characterised by its independent basic research. The university has identified 16 profile areas within the broad research spectrum. The research within three out of these profile areas is performed at the Department of Physics.

Astrophysics, Cosmology and Particle Physics

From the smallest building blocks of the universe to how galaxies form and evolve over billions of years

Den dubbla elektrostatiska lagringsringen DESIREE vid Fysikum

Atomic, Molecular and Complex Quantum System Physics

This profile area spans many fields, from studies of single isolated atoms to fundamental molecular processes in bulk water, to studies of entangled photon and particle states, quantum encryption, quantum information

Mathematical Theory Development and Modelling

The mathematical equations that describe matter and its interactions at the fundamental level

Research Divisions

Condensed Matter and Quantum Optics
Elementary Particle Physics
Instrumentaton Physics