The introduction of a pyrrole ring at one of the meso positions of carbazole-based porphyrins lowers the structural symmetry and results in dual emission, which strongly depends on the excitation wavelength and temperature. The origin of dual emission induced by NH-tautomerism is confirmed via photophysical and DFT calculations.
A. Kalaiselvan, A. Spergen, I. S. V. Krishna, V. S. Reddy and S. Gokulnath, Chem. Commun., 2021, 57, 4420 DOI: 10.1039/D1CC00868D
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