The excitation wavelength dependent fluorescence of porphyrins

作者: Mahesh Uttamlal , A. Sheila Holmes-Smith

DOI: 10.1016/J.CPLETT.2008.02.012

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摘要: Abstract Spectroscopic studies of meso-tetraphenylporphyrin and other meso-substituted porphyrin derivatives have revealed a dual fluorescence emission process. The first is the usual 1(π←π∗) transition. second alternative process proposed to arise following tautomerism inner macrocyclic hydrogen atoms via an atom tunnelling This occurs when exciting at virtually all wavelengths in Q band region but, its most intense Qx(0,0) not observed Soret maximum, i.e., spectrum TPP dependent on excitation wavelength.

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