Mechanistic study of the synthesis and spectral properties of meso-tetraarylporphyrins

Porphyrins XXIV. Energy, oscillator strength, and Zeeman splitting calculations (SCMO-CI) for phthalocyanine, porphyrins, and related ring systems

“…[11] show positive and negative polarization regions of the B band separated by 600 em - 1 . (ii) The vapor and solution In addition we might note that a weak peak at ~ 21000 em -1 has been consistently observed by Longo and coworkers [13] in substituted free base tetraphenylporphins between QY (1, 0) and the Soret band. It can also be observed in free base octaethylporphin [12a], and possibly one of the peaks in free base porphin in the region }, ~ 485 11111 [8] is of the same origin.…”

“…The most important terms for vlt;<;l are the orbital/z values. It is simple enough to show that (13) a a<b…”

Quantum efficiency of energy transfer in noncovalent carbon nanotube/porphyrin compounds

“…The PLE peak amplitude of nanotubes is related to their absorption cross-section σ S 22 (1.1 ± 0.1×10 −12 cm 2 .µm −1 ) for (6,5) nanotubes [11], since it is well established that the internal conversion from S 22 to S 11 is ultrafast and efficient [12,13]. On the other hand, the PLE peak at 2.805 eV (EET) is related to the absorption cross-section of the porphyrin (σ T P P = 7 × 10 −16 cm 2 ) [14], the surface coverage of the nanotube by TPP molecules (α) and the transfer yield (η). The equal amplitude of the two PLE peaks leads to the following relationship:…”

Using 5,10,15,20-tetra(4-nitrophenyl)porphyrin as a fluorescent chemosensor to determine Ru3+

“…Herein, 5,10,15,20-tetra(4-nitrophenyl)porphyrin (TNPP) was synthesized and then used as a fluorescent chemosensor for the determination of Ru 3+ . To the best of our knowledge, TNPP has been synthesized by various methods [21][22][23] but it has never been used as a tool to determine the amount of any ions before. Consequently, it would be beneficial to use TNPP as a new fluorescent chemosensor to determine Ru 3+ .…”