Tag: 600-700

A calix[4]arene-modified (Pc)Eu(Pc)Eu[T(C4A)PP]-based sensor for highly sensitive and specific host-guest electrochemical recognition was written by Dong, Jurong;Yu, Zhenning;Kong, Xia;Zhao, Shuai;Li, Xiyou;Chen, Yuting;Chen, Yanli;Jiang, Jianzhuang. And the article was included in Dalton Transactions in 2019.Application of 57412-08-5 The following contents are mentioned in the article:

A calix[4]arene (C4A)-functionalized (phthalocyaninato)(porphyrinato) europium(III) triple-decker compound (Pc)Eu(Pc)Eu[T(C4A)PP] (1) is firstly designed, synthesized and prepared into well-organized films using a simple solution-processing quasi-Langmuir-Shaefer (QLS) method. The QLS film of 1 on an ITO (film 1/ITO) electrode, serving as a host-guest electrochem. recognition layer, is able to establish specific responses/interactions toward organic mols. with biol. and drug interest including dopamine (DA), uric acid (UA), tyrosine (Tyr), tryptophan (Trp) and Acetaminophen (APAP), depending mainly on the matching degree of mol. dimensions between the analytes and the C4A cavity in addition to their chem. nature. More significantly, the film 1/ITO electrode shows a wide linear range of electrochem. detection (from 0.1 to 100¦ÌM) to DA and APAP, with a high sensitivity of 53.0 and 94.3¦ÌA mM^-1 and a low detection limit of 25 and 11 nM for DA and APAP, resp., representing the best result among the nonenzymic organic semiconductor-based biosensors. In particular, the film 1/ITO electrode exhibits excellent stability, reproducibility, high selectivity, and anti-interference nature for the detection of both DA and APAP, indicating the great potential of calix[n]arene macrocycle-modified tetrapyrrole rare earth sandwich compounds in the field of ultrasensitive and specific nonenzymic sensors. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Application of 57412-08-5).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. A ligand is an ion or molecule, which donates a pair of electrons to the central metal atom or ion to form a coordination complex. Replacing precious metals with cheaper and more environmentally friendly metals is regarded as a highly desirable goal in the field of catalysis.Application of 57412-08-5

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Phosphorus-nitrogen compounds. Part 17: The synthesis, spectral and electrochemical investigations of porphyrino-phosphazenes was written by Egemen, Gamze;Hayvali, Mustafa;Kilic, Zeynel;Solak, A. Osman;Ustundag, Zafer. And the article was included in Journal of Porphyrins and Phthalocyanines in 2010.Quality Control of 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol The following contents are mentioned in the article:

The reactions of unsym. porphyrins 5,10,15-tris(4-tolyl)-20-(3-R-4-R’-phenyl)porphyrins (R’ = OH; R = H, 1; R = Me, 2) with Ni(OAc)₂¡¤4H₂O in boiling DMF produce porphyrin complexes (3 and 4). From the reactions of free porphyrin ligands 1 and 2 with hexachlorocyclotriphosphazatriene, N₃P₃Cl₆, the new free porphyrino-phosphazene derivatives (R’ = O-P₃N₃Cl₅, 5 and 6) were obtained. However, the reactions of N₃P₃Cl₆ with porphyrin complexes (3 and 4) afford the new nickel porphyrino-phosphazene complexes (R’ = O-P₃N₃Cl₅, 7 and 8). In the literature there are a few examples of the porphyrino-phosphazene architectures. The structural studies of all the compounds were made by elemental analyses, MS, FTIR, ¹H NMR, ³¹P NMR and UV-visible techniques. The cyclic voltammograms (CVs) were examined in acetonitrile (MeCN) containing 0.1M tetrabutylammonium-tetrafluoroborate (TBATFB) to study the surface attachment properties at the glassy carbon electrode (GCE) and the influence of the presence of metal cations in the porphyrin ring. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Quality Control of 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligands are classified based on the number of lone pair electrons available for the central metal atom, size and charge like anionic, cationic, neutral, monodentate, bidentate, polydentate ligands. The ability of ligands to engender a variety of useful properties of organometallic complexes is the major enabling force for the discovery of new catalytic reactions, activation of small molecules, dramatically enhanced reactivity.Quality Control of 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Synthesis and Photophysical Properties of a Conformationally Flexible Mixed Porphyrin Star-Pentamer was written by Bell, Toby D. M.;Bhosale, Sheshanath V.;Ghiggino, Kenneth P.;Langford, Steven J.;Woodward, Clint P.. And the article was included in Australian Journal of Chemistry in 2009.Formula: C47H36N4O The following contents are mentioned in the article:

The synthesis of a porphyrin star-pentamer bearing a free-base porphyrin core and four Zn(II) metalloporphyrins, which are tethered by a conformationally flexible linker about the central porphyrin’s antipody, is described. The synthetic strategy is highlighted using olefin cross metathesis to link the five chromophores together in a directed fashion in high yield. Photoexcitation into the Soret absorption band of the Zn porphyrin chromophores at 425 nm leads to a substantial enhancement of central free-base porphyrin fluorescence, indicating energy transfer from the photoexcited Zn porphyrin (outer periphery) to central free-base porphyrin. Time-resolved fluorescence decay profiles required three exponential decay components for satisfactory fitting. These are attributed to emission from the central free-base porphyrin and to two different rates of energy transfer from the Zn porphyrins to the free-base porphyrin. The faster of these decay components equates to an energy-transfer rate constant of 3.7 ¡Á 10⁹ s^-1 and an efficiency of 83%, whereas the other is essentially unquenched with respect to reported values for Zn porphyrin fluorescence decay times. The relative contribution of these two components to the initial fluorescence decay is ?3:2, similar to the 5:4 ratio of cis and trans geometric isomers present in the pentamer. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Formula: C47H36N4O).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Attachment of the ligand to the metal may be through a single atom, in which case it is called a monodentate ligand, or through two or more atoms, in which case it is called a didentate or polydentate ligand. The ability of ligands to engender a variety of useful properties of organometallic complexes is the major enabling force for the discovery of new catalytic reactions, activation of small molecules, dramatically enhanced reactivity.Formula: C47H36N4O

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Photoinduced Processes in Self-Assemblies of Bis-Porphyrinic Tweezers with an Axially Coordinated Bispyridinofullerene was written by Bris, Anamarija;Troselj, Pavle;Margetic, Davor;Flamigni, Lucia;Ventura, Barbara. And the article was included in ChemPlusChem in 2016.Computed Properties of C47H36N4O The following contents are mentioned in the article:

Self-assembled bis(zinc porphyrin)-bispyridinopyrrolidinofullerene coordination complexes were obtained in solution Two [5]polynorbornane-bridged bis-porphyrins were used that differed in the arms containing porphyrin units: whereas 1 has rigid [5]polynorbornane linkers, compound 2 has addnl. flexible Pr chains. The different geometries of the two hosts affect both the complexation process and the photoreactivity of the final product. Formation of the complexes, characterized by absorption, emission, and NMR spectroscopy, occurs with association constants in the order of 10⁴ and 10⁶?M^-1 for bis-porphyrin tweezers 1 and 2, resp. The higher flexibility of tweezers 2 accounts for the greater association ability. Full photophys. characterization of the complexes, as well as of suitable models, has been performed by means of steady-state and time-resolved optical spectroscopy. Ultrafast luminescence detection and pump-probe transient absorption anal. were used to investigate photoinduced processes within the complexes. The results provide evidence that an electron-transfer process from the bis-porphyrin host to the fullerene guest occurs in both complexes, and a slightly longer lifetime of the charge-separated state is observed in the complex with more flexible host 2. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Computed Properties of C47H36N4O).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligands are classified based on the number of lone pair electrons available for the central metal atom, size and charge like anionic, cationic, neutral, monodentate, bidentate, polydentate ligands. It is clear that future advancements in metal complexes and their applications crucially depend on ligand design, whereas the ligand electronic, steric and topological properties provide numerous improvements to the reactivity and selectivity at the metal centers.Computed Properties of C47H36N4O

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI