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Abstract
Herein, we report a simple approach to generate stable
luminescent radicals in the presence of gentle UV irradiation. The newly generated radical
species are capable of emitting unusual red light with a maximum fluorescence quantum
efficiency of 4.6% at ambient conditions in the solid state. Additionally, the luminescent
radicals show extraordinary stability with more than one-year life-span at ambient conditions.
X-ray diffraction study combined with photophysical and computational analyses reveal that
the unique molecular symmetry breaking in the crystalline state lead to the unusual formation
and stabilization of radical ion pairs via the photo-induced electron transfer (PET) process. Such
results represent the first time to achieve stable emissive radicals in the solid state at ambient
conditions via in-situ PET process.
luminescent radicals in the presence of gentle UV irradiation. The newly generated radical
species are capable of emitting unusual red light with a maximum fluorescence quantum
efficiency of 4.6% at ambient conditions in the solid state. Additionally, the luminescent
radicals show extraordinary stability with more than one-year life-span at ambient conditions.
X-ray diffraction study combined with photophysical and computational analyses reveal that
the unique molecular symmetry breaking in the crystalline state lead to the unusual formation
and stabilization of radical ion pairs via the photo-induced electron transfer (PET) process. Such
results represent the first time to achieve stable emissive radicals in the solid state at ambient
conditions via in-situ PET process.
Content
Supplementary material
Supporting information
After purification-daylight
After purification-UV light
Commercial TCPP
TCPP 100 K
TCPP 293 k
