Observation of the distorted form of Pd-porphin in single site spectra at low temperatures

Sensing Properties of Palladium and Lanthanide Porphynates Embedded in Nanoporous Silica Gel-Materials

“…Absorption spectrum of PdP in TEOS:VTEOS bulk contains bands at 386 (Soret), 502 (Q 01 ) and 534 (Q 00 ) nm and is close to PdP absorption in DMF. [9,13,15] Fluorescence spectra of the obtained solid-state films and bulks coincide with the fluorescence spectra of PdP in DMF solution (Figure 2). Phosphorescence spectrum of PdP in gel-film and volume matrix (λ ex =370 nm) under argon is presented by 0-0-band with maximum at 647 nm and vibrational satellite at 716 nm (Figure 3), that is close to phosphorescence spectrum of PdOEP.…”

Influence of Macrocycle Protonation on the Photophysical Properties of Porphyrins

“…[41] For metallocomplexes of symmetrically substituted porphyrin derivatives as well as for metallocomplexes of unsubstituted porphin the splitting value exceeds a few tens of wavenumbers. [41][42][43][44][45][46] As it was found in case of the H 2 TMP complex with Zn II and Pd II ions, lifting in the degeneracy of two lowest singlet electronic [42,43] The amount of the ∆E(S 2 -S 1 ) splitting due to this asymmetrical substitution was found to be as high as 260 and 215 cm -1 for the former and latter cases, respectively, being almost one order of magnitude larger than in the case of symmetrically substituted derivatives. Therefore, two separate distinct bands belonging to the S 1 and S 2 states can easily be observed in the absorption and fluorescence spectra of metallocomplexes of asymmetrically substituted porphyrin macrocycles.…”

Porphyrin (porphine) — A neglected parent compound with potential

“…Starukhin and co-workers [86,87]. They traced two PdP macrocycle conformations in the fine structure phosphorescence spectra in a large number of Shpol'skii matrices at liquid helium temperature.…”