Synthesis and properties of 5,10,15,20-tetra[4-(3,5-dioctoxybenzamidephenyl] porphyrin and its metal complexes

Abstract

A novel 5,10,15,20-tetra[4-(3,5-dioctoxybenzamide)phenyl]porphyrin and its transition metal complexes are reported in this paper. Their molecular structures were characterized by elemental analysis, IR spectra, 1HNMR spectra and UV-Vis spectra. Their spectroscopic properties were studied by Raman spectra, fluorescence spectra and X-ray photoelectron spectra (XPS). The fluorescence quantum yields have been measured at room temperature. The fluorescence intensity of porphyrin ligand was stronger than that of the complexes. In Raman spectra, there was much difference between porphyrin ligand and its metal complexes due to changes of the symmetry of porphyrin plane. In the XPS spectra, the replacement of the free-base protons by a metal ion to form the metalloporphyrin increases the symmetry of the molecule also introduces an electron with-drawing group into the center of the porphyrin ligand which increases the N1s binding energy

One-pot synthesis of manganese porphyrin covalently functionalized graphene oxide for enhanced photocatalytic hydrogen evolution

“…Figure 4a illustrates the survey spectra of GO, MnTPPCl, and GO-MnTPP. The peaks at about 285.2, 400.2, 532.2 and 642.2 eV in the spectra can be assigned to the binding energy of C 1s, N 1s, O 1s and Mn 2p, respectively [42,47,48]. The spectrum of GO shows the presence of C and O elements.…”

“…The FTIR spectrum of MnTPPCl shows bands centered at 1596 and 1204 cm -1 , corresponding to the bending vibrations of the C=N and the C-N bonds, respectively [39][40][41]. Besides, the band at 1009 cm -1 attributed to the Mn-N vibration can also be observed [42]. In the spectrum of GO-MnTPP, the characteristic peaks of both GO and MnTPP moieties can be observed.…”

Novel Platinum-Porphyrin as Sensing Compound for Efficient Fluorescent and Electrochemical Detection of H2O2

“…The C=N bonding vibration has a lower frequency (1452 cm −1 ) in Pt(II)-TAPP than in the porphyrin base (1472 cm -1 ) due to the influence of the platinum atom [31,32]. Another significant band is the vibration of the C-O-C bond, located at 1006 cm −1 in the Pt-porphyrin [33].…”

Photoinduced energy and electron transfer in rubrene–benzoquinone and rubrene–porphyrin systems

“…Thus, Ru emission overlaps with the Q bands of TAPP, potentially allowing for energy migration from Ru to TAPP. For comparison, at the same excitation wavelength, amino substituted porphyrin provides emission at 687 nm with a typical quantum efficiency of 0.06 [49], and it does not have a strong spectral overlap with the absorption spectrum of Ru. Consequently, the opposite process, energy migration from TAPP to Ru, is less feasible.…”