TY - JOUR
KW - General Materials Science
AU - Wyatt Zagorec-Marks
AU - Madison Foreman
AU - Jan Verlet
AU - J. Mathias Weber
AB - We present vibrational and electronic photodissociation spectra of a model chromophore of the green fluorescent protein in complexes with up to two water molecules, prepared in a cryogenic ion trap at 160–180 K. We find the band origin of the singly hydrated chromophore at 20 985 cm–1 (476.5 nm) and observe partially resolved vibrational signatures. While a single water molecule induces only a small shift of the S1 electronic band of the chromophore, without significant change of the Franck–Condon envelope, the spectrum of the dihydrate shows significant broadening and a greater blue shift of the band edge. Comparison of the vibrational spectra with predicted infrared spectra from density functional theory indicates that water molecules can interact with the oxygen atom on the phenolate group or on the imidazole moiety, respectively.
BT - The Journal of Physical Chemistry Letters
DA - 2020-02
DO - 10.1021/acs.jpclett.0c00105
IS - 5
N2 - We present vibrational and electronic photodissociation spectra of a model chromophore of the green fluorescent protein in complexes with up to two water molecules, prepared in a cryogenic ion trap at 160–180 K. We find the band origin of the singly hydrated chromophore at 20 985 cm–1 (476.5 nm) and observe partially resolved vibrational signatures. While a single water molecule induces only a small shift of the S1 electronic band of the chromophore, without significant change of the Franck–Condon envelope, the spectrum of the dihydrate shows significant broadening and a greater blue shift of the band edge. Comparison of the vibrational spectra with predicted infrared spectra from density functional theory indicates that water molecules can interact with the oxygen atom on the phenolate group or on the imidazole moiety, respectively.
PB - American Chemical Society (ACS)
PY - 2020
SP - 1940
EP - 1946
T2 - The Journal of Physical Chemistry Letters
TI - Probing the Microsolvation Environment of the Green Fluorescent Protein Chromophore In Vacuo
VL - 11
SN - 1948-7185, 1948-7185
ER -