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Red-shifting the optical response of firefly oxyluciferin with group 15/16 substitutions.

Authors: Bruce F. Milne

Ref.: Physical Chemistry Chemical Physics 16, 24971-24977 (2014)

Abstract: Time-dependent density functional theory has been used to investigate the effects of group 15/16 element substitution on the optical response of firefly oxyluciferin. A range of analogues containing symmetrical substitutions at the N and S atom positions of the naturally-occurring oxyluciferin have been found to have red-shifted electronic excitation energies with the heaviest derivative investigated (As/Se) displaying a shift of −0.69 eV. Fluorescence emission wavelengths for all P- and As-containing derivatives in DMSO are estimated to lie in the 710–930 nm region making them interesting for bio-imaging applications.

DOI: 10.1039/C4CP04347B