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@INPROCEEDINGS{Schrader:972034,
author = {Schrader, Tobias Erich},
title = {{D}esign considerations of {UV}-visible {M}icrospectroscopy
at single crystal neutron diffractometers},
reportid = {FZJ-2023-01043},
year = {2022},
abstract = {Single crystal neutron diffraction experiments on protein
crystals often require beamtimes of several days in order to
measure a complete data set which leads to meaningful
results on atom positions and occupancies. In case of room
temperature measurements, the sample under investigation
might change during that time. If one wants to study a
radical intermediate state of the protein, often linked to a
distinct UV-visible absorption of the crystal, one is often
interested in the decay of the number of radicals in the
crystal. Below a certain number, one would rather switch to
another freshly prepared crystal. This would save precious
neutron beamtime. At synchrotron beamlines, UV-Visible
microspectroscopy of the crystals mounted on the goniometer
is readily available. The purpose of this set-up is to
measure the UV-visible spectrum on an oriented crystal on
the beamline without the need to take it off the beamline
goniometer. This has the advantage that the crystal
orientation relative to the light beam and polarization is
known. Furthermore, a crystal unmounting step can be avoided
for just measuring its UV-visible spectrum. At neutron
instruments, such microspectroscopy set-ups are usually not
found. But this set-up could also be used to detect whether
a ligand is present in a crystal, when the ligand has some
optical absorption fingerprint. In this contribution I will
discuss some design considerations of such a set-up.},
month = {Dec},
date = {2022-12-08},
organization = {MLZ usermeeting 2022, München
(Germany), 8 Dec 2022 - 9 Dec 2022},
subtyp = {After Call},
cin = {JCNS-FRM-II / MLZ / JCNS-1 / JCNS-4},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-4-20201012},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
(POF4-6G4) / 632 - Materials – Quantum, Complex and
Functional Materials (POF4-632)},
pid = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632},
experiment = {EXP:(DE-MLZ)BIODIFF-20140101},
typ = {PUB:(DE-HGF)24},
url = {https://juser.fz-juelich.de/record/972034},
}