123444-60-0Relevant articles and documents
Through the challenging synthesis of tetraphenylporphyrin derivatives bearing nitroxide moieties
?nal, Emel,Fidan, Ismail,Luneau, Dominique,Hirel, Catherine
, p. 584 - 588 (2019)
Tetraphenylporphyrin derivatives a synthetic heterocycles with convenient preparation and a richness of properties which make them attractive in broad fields such as energy, life and materials sciences. Thus, in the quest for new radical architectures, tetraphenylporphyrins are prime candidates. To this end, we designed free-base tetraphenylporphyrins bearing nitronyl and imino nitroxide moieties covalently bonded to the para-position of the meso-phenyl substituent. Their detailed synthesis and characterization are reported here.
SYNTHESIS AND PHOTOPHYSICS OF DIAZA-CROWN ETHER-BASED BISPORPHYRINS
Martensson, Jerker,Sandros, Kjell,Wennerstroem, Olof
, p. 534 - 544 (1994)
The bisporphyrin N,N'-bis-4,13-diaza-18-crown-6 and its mono- and dizinc derivatives were synthesized in 66percent, 46percent and 53percent yields, respectively, from 5-(4'-bromomethylphenyl)-10,15,20-triphenylporphyrin or its zinc derivative and 4,13-diaza-18-crown-6.The zinc-containing bisporphyrins form dimers in solution at low temperature or at high concentration.The unsymmetrical bisporphyrin; monozinc N,N'-bis-4,13-diaza-18-crown-6 shows singlet-singlet energy transfer from the zinc porphyrin moiety to the free base moiety in both the monomeric and the dimeric form.The energy transfer rates were determined using time-resolved fluorescence spectroscopy and were found to be 1.26x109 and 2.29x109 s-1 for the monomeric and dimeric form, respectively.The difference in energy transfer rates between the two forms can be rationalized by the difference in overlap between the donor fluorescence spectrum and acceptor absorption spectrum, donor-acceptor distance and donor-acceptor orientation.
Combining metalloporphyrins and cyclometalated complexes – A luminous pair?
Borisov, Sergey M.,Moritz, Yvonne,Steinegger, Andreas
, (2021)
Cyclometalation is investigated as a method to modulate the photophysical properties of phosphorescent (benzo)porphyrins. For cyclometalation with Pt(II), 2-pyridyl groups were incorporated into three Pd(II) porphyrin complexes. Integration of the freely rotating cyclometalated 2-phenylpyridyl based motif in meso-position does not lead to notable spectral changes and only affects the luminescence decay time (about 2-fold decrease) in solution at room temperature. The decay times, however, are not affected in frozen glass at 77 K or immobilized into a rigid polystyrene matrix. In contrast, cyclometalation involving a 2-pyridyl unit in meso-position and the β-H of the porphyrin results in a large bathochromic shift (～ 1900 cm?1) of Q-bands in the absorption spectrum and the phosphorescence peak. A drastic decrease of the phosphorescence lifetime (about 20-fold) also is observed. Cyclometalation is accompanied by an increase of the singlet oxygen quantum yield to 85 % making the new dye a powerful red-light excitable 1O2 photosensitizer.
Synthesis and photodynamic activities of a new metronidazole-appended porphyrin and its Zn(II) complex
Yu, Qiong,Xu, Wei-Xia,Yao, Ya-Hong,Zhang, Zeng-Qi,Sun, Shu,Li, Jun
, p. 1107 - 1113 (2015)
One novel porphyrin 5,10,15-tris(phenyl)-20-[4-(2-(2-methyl-5-nitro-imidazolyl)ethoxyl)phenyl] porphyrin and its zinc(II) metalloporphyrin were synthesized and characterized by IR, UV-vis, 1H NMR, MS and elemental analysis. The single crystal s
Preparation and application of double-porphyrin-containing compound
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Paragraph 0029-0034, (2021/06/26)
The invention relates to a double-porphyrin compound with switching performance. The structural general formula of the double-porphyrin compound is I. The double-porphyrin compound provided by the invention not only can be complexed with fullerene supramo
