• derivative
  • This chapter contains a tabular compilation of infrared data and UV-visible spectral data of holmium complex of porphyrin derivative C 56 H 51 HoN 4 O 3 . (springer.com)
  • This chapter contains a tabular compilation of nuclear magnetic resonance data, infrared data and UV-visible spectral data of ruthenium complex of porphyrin derivative C 44 H 9 F 20 N 5 O 2 Ru. (springer.com)
  • This chapter contains a tabular compilation of nuclear magnetic resonance data and UV-visible spectral data of thallium complex of porphyrin derivative C 110 H 90 Cl 2 N 8 Tl 2 . (springer.com)
  • 2. A porphyrin derivative according to claim 1 in the form of its pyridylium salt of the formula: ##STR29## in which R 2 is as defined in claim 1, R 7 is a C 1 to C 4 alkyl radical, A is an anion chosen from among Cl - , Br - or I - and M is a radioactive metal. (google.nl)
  • 10. A pharmaceutical composition, characterized in that it comprises, as active ingredient, a porphyrin derivative as defined in claim 1, in a pharmaceutically acceptable carrier. (google.nl)
  • 11. A pharmaceutical composition, characterized in that it comprises, as active ingredient, a porphyrin derivative according to claim 2 in a pharmaceutically acceptable carrier. (google.nl)
  • The present invention relates to an optionally metallized porphyrin derivative, which can be coupled to a biologically active molecule. (google.nl)
  • One of the first functional analogues of myoglobin was the ferrous derivative of the "picket fence porphyrin," which is structurally related to Fe(TPP), being derived via the condensation of 2-nitrobenzaldehyde and pyrrole. (wikipedia.org)
  • ligand
  • A schematic equation for these syntheses is shown: H2porphyrin + [MLn]2+ → M(porphyrinate)Ln−4 + 4 L + 2 H+ where M = metal ion and L = a ligand A porphyrin without a metal-ion in its cavity is a free base. (wikipedia.org)
  • Co(II)-porphyrin catalysts has good thermal and metal coordination stability resulting from the macrocyclic chelation effect of the aromatic ligand. (wikipedia.org)
  • Third, it has been well documented that the physical and chemical properties of a porphyrin complex of a given metal ion can be systematically tuned by introducing peripheral substituents with varied electronic, steric, and conformational environments on the aromatic ring structure of the porphyrin ligand. (wikipedia.org)
  • The initially formed C- and N-centered radicals can undergo common radical reactions such as radical addition and atom abstraction, but with effective control of reactivity and stereoselectivity by the porphyrin ligand environment. (wikipedia.org)
  • Guilard
  • Published by World Scientific, the Handbook of Porphyrin Science: With Applications to Chemistry, Physics, Materials Science, Engineering, Biology and Medicine is a multi-volume reference set edited by scientists Karl Kadish, Kevin Smith and Roger Guilard. (wikipedia.org)
  • Uroporphyrins
  • No single vitamin of these three will inhibit the damaging effects of oxidized porphyrins, specifically uroporphyrins and coproporphyrins, but all three working together synergistically are capable of neutralizing their damaging effects. (wikipedia.org)

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  • radicals
  • Due to their distinctive radical mechanisms that involve metal-stabilized radical intermediates, such as α-metalloalkyl radicals, α-metalloaminyl radicals, and α-metalloxyl radicals, the Co(II)-porphyrin-based catalysis system addresses some long-standing challenges in organic transformations. (wikipedia.org)
  • Stable metalloradicals such as Co-porphyrin catalysis activate diazo reagents and organic azides to generate C- and N-centered radicals, respectively, with nitrogen as the only byproduct in a controlled and catalytic manner. (wikipedia.org)
  • polymers
  • The polymerization, in the presence of a free-base porphyrin cored chain transfer agent (CTA-FBP), produced porphyrin star polymers with controlled molecular weights and narrow polydispersities for a number of monomers including N , N -dimethylacrylamide (DMA) and styrene (St). Well-defined amphiphilic star block copolymers, P-(PS-PDMA) 4 and P-(PDMA-PS) 4 (P: porphyrin), were also prepared and used for self-assembly studies. (hindawi.com)
  • Several porphyrin polymers have been synthesized [ 3 - 17 ]. (hindawi.com)
  • 14 ]. Despite these interesting discoveries, the self-assembly behaviour of porphyrin polymers is far from being understood and further research is required. (hindawi.com)
  • However, its use has been limited to metal ion (Zn(II) [ 16 ], Pd(II) [ 17 ]) coordinated porphyrin initiators and thus the production of metal complexed polymers. (hindawi.com)
  • Attempts to synthesize polymers containing free-base porphyrin using ATRP was unsuccessful, because Cu(II) (formed by the Cu(I) catalyst) will preferentially insert into the porphyrin core [ 14 , 16 ]. (hindawi.com)
  • Although metalloporphyrin polymers possess many interesting properties for applications, such as catalysis, light harvesting, oxygen transportation [ 3 - 17 ], and so on, other increasingly studied applications, such as sensors [ 18 ], prefer free-base porphyrin polymers. (hindawi.com)
  • pyrrole
  • A benzoporphyrin is a porphyrin with a benzene ring fused to one of the pyrrole units. (wikipedia.org)
  • Chlorins (2,3-dihydroporphyrin) are more reduced, contain more hydrogen than porphyrins, i.e. one pyrrole has been converted to a pyrroline. (wikipedia.org)
  • derivatives
  • Some porphyrin derivatives follow Hückel's rule, but most do not. (wikipedia.org)
  • The present invention relates to metallized porphyrin derivatives having the formula: ##STR1## wherein the R and M variables are as defined in the specification. (google.nl)
  • Said porphyrin derivatives having uses as antitumor agents, diagnostics agents, or in therapy. (google.nl)
  • More specifically, it relates to porphyrin derivatives usable in the pharmaceutical field, either as antitumour agents, or diagnostic agents, or in therapy, particularly when they incorporate a radioactive metal. (google.nl)
  • Molecules
  • They find that electron- acceptor molecules such as trinitrobenzene (TNB) form 1:1 adducts with the expanded porphyrins, which leads to changes in color and can produce columnar stacking and the formation of discotic mesophases. (sciencemag.org)
  • molecular
  • A very simple and efficient singlet-oxygen-mediated oxidative system that uses solar radiation, molecular oxygen, and Merrifield-supported porphyrins is presented. (wiley.com)
  • Hydrogels prepared from high molecular mass PVA have a better sorption profile for porphyrins, and are better suited for the preparation of controlled release vehicles. (ad-astra.ro)
  • aromatic
  • With a total of 26 π-electrons, of which 18 π-electrons form a planar, continuous cycle, the porphyrin ring structure is often described as aromatic. (wikipedia.org)
  • iron
  • Some iron-containing porphyrins are called hemes. (wikipedia.org)
  • The damaging effects of porphyrins interacting with iron, absorbing photons to then emit reactive oxygen species is the mechanism of action that results in the itchy, painful blisters that are common with PCT. (wikipedia.org)
  • electron
  • Density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations suggest that the higher J sc values of Zn-based porphyrin sensitizers result from the favorable electron injection from the LUMO at higher energy levels. (mdpi.com)
  • acid
  • In non-photosynthetic eukaryotes such as animals, insects, fungi, and protozoa, as well as the α-proteobacteria group of bacteria, the committed step for porphyrin biosynthesis is the formation of δ-aminolevulinic acid (δ-ALA, 5-ALA or dALA) by the reaction of the amino acid glycine with succinyl-CoA from the citric acid cycle. (wikipedia.org)
  • biological
  • Porphyrin containing biological systems, where the dye usually works in aggregated structures, offer insights to these possibilities. (hindawi.com)
  • Visual phototransduction Woodward's rules Chromatophore Pigment Photophore Fluorophore Litmus Biological pigment IUPAC Gold Book Chromophore Gouterman, M. (1978) Optical spectra and electronic structure of porphyrins and related rings. (wikipedia.org)