Catalysis-chemistry

The photoinduced electron transfer of porphyrin-anthraquinone dyads bridged with alkoxy chains of different lengths was written by Zhao, Ping;Huang, Jin-Wang;Xu, Lian-Cai;Ma, Li;Ji, Liang-Nian. And the article was included in Spectrochimica Acta in 2011.Safety of 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol The following contents are mentioned in the article:

The photoinduced electron transfer (PET) interaction in porphyrin containing donor-acceptor (D-A) mols. is of great importance in nature and a significant part of the PET research has been devoted to the study of its mechanism (“through-space” or “through-bond”) in these decades. The authors synthesized a series of covalently linked porphyrin-anthraquinone dyads (Por-C_n-AQ) bridged with flexible alkoxy chains with different lengths (n = 1, 4, 10) and investigated their intramol. PET using a combination of electronic absorption, steady-state fluorescence and decayed luminescence spectra. The exptl. results show that the PET efficiency depends on the length of the flexible linkage between the porphyrin and anthraquinone moieties. Meanwhile, theor. calculation applying the d. functional theory (DFT) was also carried out to give the frontier orbital distribution and the optimized structures of these dyads. It is found that the orientation of the dyad with high PET efficiency is disadvantageous to ¦Ð-¦Ð interaction. Thus, the PET of these dyads seemingly is best compatible with a “through-bond” (superexchange) mechanism. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Safety 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. Ligand design occupies a central place in organic synthesis and catalysis. The ligands are electron-rich and highly tunable to provide catalyst systems with a diverse scope, high stability, and reactivity.Safety of 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol

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

Addition of Porphyrins to Cigarette Filters To Reduce the Levels of Benzo[a]pyrene (B[a]P) and Tobacco-Specific N-Nitrosamines (TSNAs) in Mainstream Cigarette Smoke was written by Wang, Changguo;Dai, Ya;Feng, Guanglin;He, Rong;Yang, Wenmin;Li, Dongliang;Zhou, Xuezheng;Zhu, Lijun;Tan, Lanlan. And the article was included in Journal of Agricultural and Food Chemistry in 2011.Recommanded Product: 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol The following contents are mentioned in the article:

Tobacco-specific N-nitrosamines (TSNAs) and benzo[a]pyrene (B[a]P) in mainstream cigarette smoke (MSS) cause smoking-related diseases and environmental pollution. Porphyrins were added to cigarette filters to reduce B[a]P (porphyrins A-E) and TSNAs (porphyrin F) in MSS. The porphyrin-B[a]P and porphyrin F-TSNAs (N’-nitrosoanabasine (NAB), N’-nitrosoanatabine (NAT), 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), and N-nitrosonornicotine (NNN)) interactions were investigated by fluorescence quenching and UV-visible spectroscopy. The correlation coefficients were 0.987-0.997 (B[a]P) and 0.994-0.999 (TSNAs), and the binding constants were (1.67-5.02) ¡Á 10⁵ (B[a]P) and 3.42 ¡Á 10³-1.40 ¡Á 10⁴ (TSNAs). Up to 36.72% of B[a]P and 46.67% of the TSNAs were eliminated from MSS, with greater reductions when more porphyrin was included in the filter. With the same mass of porphyrin in the filter, the reduction trend for B[a]P by porphyrins A-E was A > B > C > D > E. The reduction trend for TSNAs by porphyrin F was NNN > NAB > NNK > NAT. The porphyrin mode of action is possibly through strong ¦Ð-¦Ð interactions. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Recommanded Product: 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. The atoms and molecules used as ligands are almost always those that are capable of functioning as the electron-pair donor in the electron-pair bond (a coordinate covalent bond) formed with the metal atom. Precious metals and metal oxides on carrier materials are used in many industrial processes as heterogenous catalysts.Recommanded Product: 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol

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

Manganeseporphyrins immobilized on silica microspheres as biomimetic catalysts hydroxylating cyclohexane with molecular oxygen was written by Cai, Jin-Hua;Huang, Jin-Wang;Yu, Han-Cheng;Ji, Liang-Nian. And the article was included in Journal of Sol-Gel Science and Technology in 2011.Electric Literature of C47H36N4O The following contents are mentioned in the article:

Three types of silica microspheres immobilizing Mn(III) porphyrins appending p-CH₃, p-H and p-Cl Ph substituents (designated as MnMP-S-SiO₂, MnPP-S-SiO₂ and MnCP-S-SiO₂, resp.) have been synthesized and characterized using SEM, IR, UV-vis and TG. The SEM images show that the morphol. of the silica microspheres is spheriform with ca. 2-4 ¦Ìm diameter The catalytic performances of various supported biomimetic catalysts for the hydroxylation of cyclohexane in the presence of mol. oxygen under mild conditions have been investigated and compared detailedly. The exptl. results confirmed that the catalytic efficiencies of these silica microspheres are much higher than those of the free Mn(III) porphyrin analogs and follow the order of MnMP-S-SiO₂ > MnPP-S-SiO₂ > MnCP-S-SiO₂. All these results indicate that the grafting particles can not only protect metalloporphyrin from oxidation, but also promote it to activate O₂. They are mild, reusable and highly efficient heterogeneous catalyst for the epoxidation of cyclohexene. The effect of substituent groups was also discussed. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Electric Literature of C47H36N4O).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligand design occupies a central place in organic synthesis and catalysis. 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.Electric Literature of C47H36N4O

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

Metal complexes with tetrapyrrole ligands. Part 73. Oxidation and reduction of cerium(IV) sandwich complexes with porphyrin ligands linked by aliphatic diether bridges of variable chain length was written by Buchler, Johann W.;Dippell, Torsten. And the article was included in European Journal of Inorganic Chemistry in 1998.Formula: C47H36N4O The following contents are mentioned in the article:

Starting from 5-(4-hydroxyphenyl)-10,15,20-tris(4-methylphenyl)porphyrin (HL) the new bis(porphyrinyloxy)alkanes L₂(CH₂)_n (n = 8, 11) I and II, resp., were synthesized by ether formation with the ¦Á,¦Ø-dibromoalkanes Br(CH₂)_nBr. Compound I was obtained by a 2-step reaction with the 5-[4-(8-bromooctyloxy)phenyl]-10,15,20-tris(4-methylphenyl)porphyrin as an intermediate. The diporphyrins I and II were metalated with Ce(III) acetylacetonate to yield the new (porphyrin)-Ce sandwich complexes III (n = 8 and 11) which were characterized by UV/Vis, IR, ¹H-NMR, ¹³C-NMR spectroscopy and cyclic voltammetry. The mono- and dications and the Ce(III) bisporphyrinate anions of III (n = 8-11) were produced by electrochem. oxidation and reduction, resp., and were examined by UV/Vis/NIR spectroscopy. The length of the lateral chains does not have a specific effect on the 1st and 2nd oxidation potentials of the porphyrin rings and the reduction potentials of the Ce ions in the bisporphyrinate systems, and on the energy of the NIR bands of the monocations. 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. The atoms and molecules used as ligands are almost always those that are capable of functioning as the electron-pair donor in the electron-pair bond (a coordinate covalent bond) formed with the metal atom. The ligands are electron-rich and highly tunable to provide catalyst systems with a diverse scope, high stability, and reactivity.Formula: C47H36N4O

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

Synthesis, Structure and Photophysical Properties of Ferrocenyl or Mixed Sandwich Cobaltocenyl Ester Linked meso-Tetratolylporphyrin Dyads was written by Gokulnath, Sabapathi;Achary, Balahoju Shivaprasad;Kumar, Chakka Kiran;Trivedi, Rajiv;Sridhar, Balasubramanian;Giribabu, Lingamallu. And the article was included in Photochemistry and Photobiology in 2015.COA of Formula: C47H36N4O The following contents are mentioned in the article:

The authors report here the design and synthesis of porphyrin-metallocene dyads consisting of a metallocene [either ferrocene or mixed sandwich ¦Ç⁵-[C₅H₄(COOH)]Co(¦Ç⁴-C₄Ph₄)] connected via an ester linkage at meso Ph position of either free-base or Zn porphyrin. All these dyad systems were characterized by various spectroscopic and electrochem. methods. A dimeric form of these mols. was observed in the x-ray crystal structure of the zinc-porphyrin-cobaltocenyl dyad. The absorption spectra of all four dyads indicated the absence of electronic interactions between the porphyrin macrocycle and the metallocene in the ground state. However in all four dyads, fluorescence emission of the porphyrin was quenched (19-55%) as compared to their monomeric units. The quenching was more pronounced in ferrocene derivatives rather than cobaltocenyl derivatives The emission quenching can be attributed to the excited-state intramol. photoinduced electron transfer from metallocene to singlet excited state of porphyrin and the electron-transfer rates (k_ET) were established in the range 1.51 ¡Á 10⁸ to 1.11 ¡Á 10⁹ s^-1. They are solvent dependent. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5COA of Formula: C47H36N4O).

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. Precious metals and metal oxides on carrier materials are used in many industrial processes as heterogenous catalysts.COA of Formula: C47H36N4O

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

Self-assembled nanomaterials based on complementary Sn(IV) and Zn(II)-porphyrins, and their photocatalytic degradation for rhodamine B dye was written by Shee, Nirmal K.;Kim, Hee-Joon. And the article was included in Molecules in 2021.Recommanded Product: 57412-08-5 The following contents are mentioned in the article:

A series of porphyrin triads (1-6), based on the reaction of trans-dihydroxo-[5,15-bis(3-pyridyl)-10,20-bis(phenyl)porphyrinato]tin(IV) (SnP) with six different phenoxy Zn(II)-porphyrins (ZnLn), was synthesized. The cooperative metal-ligand coordination of 3-pyridyl nitrogens in the SnP with the phenoxy Zn(II)-porphyrins, followed by the self-assembly process, leads to the formation of nanostructures. The red-shifts and remarkable broadening of the absorption bands in the UV-vis spectra for the triads in CHCl3 indicate that nanoaggregates may be produced in the self-assembly process of these triads. The emission intensities of the triads were also significantly reduced due to the aggregation. Microscopic analyses of the nanostructures of the triads reveal differences due to the different substituents on the axial Zn(II)-porphyrin moieties. All these nanomaterials exhibited efficient photocatalytic performances in the degradation of rhodamine B (RhB) dye under visible light irradiation, and the degradation efficiencies of RhB in aqueous solution were observed to be 72~95% within 4 h. In addition, the efficiency of the catalyst was not impaired, showing excellent recyclability even after being applied for the degradation of RhB in up to five cycles. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Recommanded Product: 57412-08-5).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Catalytic transformations have become a mainstay in the toolkit of the synthetic and increasing non-synthetic chemist alike. The actual catalysts are metal complexes that are prepared from ligands and appropriate metal precursors.Recommanded Product: 57412-08-5

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

Optical and luminescence investigations of hydroxy substituted porphyrins in borate glasses was written by Venkatramaiah, N.;Venkatesan, R.. And the article was included in Solid State Sciences in 2011.Application In Synthesis of 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol The following contents are mentioned in the article:

Hybrid borate glasses containing various hydroxy Ph derivatives of porphyrin were prepared by melt quenching technique. The effect of hydroxy functional groups on the photophys. properties was investigated by means of optical absorption, steady-state fluorescence and time resolved fluorescence spectroscopy. The optical absorption spectra show red shift in Soret and Q-band with increase in the number of -OH groups on the Ph ring of the porphyrin. The steady-state emission spectrum shows strong S₂ ¡ú S₀ emission around 498-540 nm and red shifted S₁ ¡ú S₀ emission around 669-803 nm. Time resolved fluorescence shows three exponential decay with ¦Ó ₁ = 11 ¡À 2 ps (64.56%), ¦Ó₂ = 0.16 ¡À 0.1 ns (24.54%), and ¦Ó₃ = 2.94 ¡À 0.1 ns (10.9%) for 2 mg of H₂OHP doped glass. The appearance of strong S₂ ¡ú S₀ emission indicates that the structure of porphyrin inherently modified in the glass matrix. The boron ions of the borate network interact at the central core of the porphyrin and also form oxy bridge at the periphery. The effect of porphyrin concentration on photophys. properties and the possible structures of porphyrin in the borate glass matrix were investigated. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Application In Synthesis 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. Replacing precious metals with cheaper and more environmentally friendly metals is regarded as a highly desirable goal in the field of catalysis.Application In Synthesis 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 structural, spectroscopic and nonlinear optical measurements of graphene oxide and its composites with metal and metal free porphyrins was written by Bala Murali Krishna, M.;Venkatramaiah, N.;Venkatesan, R.;Narayana Rao, D.. And the article was included in Journal of Materials Chemistry in 2012.Electric Literature of C47H36N4O The following contents are mentioned in the article:

In this paper we present the structure and spectroscopic, photophys. and nonlinear optical studies of covalently functionalized novel graphene oxide-[Cu, Zn, Sn, H₂ (metal free), VO] porphyrin composites. The composites were characterized by Field Enhanced SEM (FE-SEM), micro-Raman, optical absorption, FTIR spectroscopy, steady-state and time-resolved fluorescence spectroscopy techniques. The composites exhibit strong fluorescence quenching, suggesting strong electronic interactions between the porphyrin and graphene oxide mols. Nonlinear optical absorption (NLA) studies of graphene oxide-porphyrin composites were investigated using the Z-scan technique at 532 and 800 nm with nanosecond (ns) and femtosecond (fs) laser pulses. Composites show strong two-photon absorption (TPA) as well as excited state absorption (ESA) leading to reverse saturable absorption (RSA) behavior in the ns regime and saturable absorption (SA) behavior was observed in fs regime. The metal-free porphyrin-graphene oxide (GO) composite shows significant nonlinear absorption behavior as well as highest fluorescence quenching behavior compared to other GO-porphyrin composites. We further observed the enhanced figure of merit (FOM) values for composites in comparison with individual mols. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Electric Literature of C47H36N4O).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligand design occupies a central place in organic synthesis and catalysis. The ligands are electron-rich and highly tunable to provide catalyst systems with a diverse scope, high stability, and reactivity.Electric Literature of C47H36N4O

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

Photobactericidal films from porphyrins grafted to alkylated cellulose – synthesis and bactericidal properties was written by Krouit, Mohammed;Granet, Robert;Krausz, Pierre. And the article was included in European Polymer Journal in 2009.Recommanded Product: 57412-08-5 The following contents are mentioned in the article:

Two series of porphyrinic cellulose laurate esters plastic films, where the photosensitizers are covalently linked to the cellulosic polymer have been synthesized by using a “one-pot, two-step” esterification reaction. The photosensitizers were first covalently bounded to the cellulosic polymer using either 4- or 11-carbon spacer arms. The porphyrinic plastic films were then obtained by a second esterification with lauric acid. The reaction was studied according to reaction time, temperature, lauric acid amount, pyridine playing the role proton trapping base. Para-toluenesulfonylchloride has been proved to be a powerful activating agent for this reaction. The drawback of the steric hindrance of the porphyrinic macrocycle towards cellulosic hydroxyl groups has been overcome by increasing the number of carbon of spacer arms from 4- to 11-carbons. The photobactericidal activity of these materials was evaluated against Gram pos. and Gram neg. strains bacteria. First results show that these new plastic films display photobactericidal activity for porphyrin grafting percentage higher than 0.16, whereas the non-porphyrinic control allowed full growth of bacteria. These materials could be an alternative in order to overcome the growing bacterial multiresistance to classical antibiotics. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Recommanded Product: 57412-08-5).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligand design occupies a central place in organic synthesis and catalysis. The ligands are electron-rich and highly tunable to provide catalyst systems with a diverse scope, high stability, and reactivity.Recommanded Product: 57412-08-5

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

Poly(arylene ether ketone)s with pendant porphyrins: synthesis and investigation on optical limiting properties was written by Du, Yinlong;Zhu, Kai;Fang, Yu;Zhang, Shuling;Zhang, Xingrui;Lu, Yaning;Yang, Yanchao;Song, Yinglin;Wang, Guibin. And the article was included in RSC Advances in 2015.COA of Formula: C47H36N4O The following contents are mentioned in the article:

This paper describes the synthesis and characterization of a novel series of poly(arylene ether ketone)s bearing porphyrin pendants, along with the demonstration of their nonlinear optical and optical limiting properties at 532 nm in both THF and films. The incorporation of pendant porphyrins was done through a modified esterification using a copoly(arylene ether ketone) with free carboxyl groups and mono-hydroxyphenyl porphyrins with different substituents and center metal. The introduction of porphyrin in the polymer was confirmed by IR, ¹H NMR, UV-vis, fluorescence spectroscopies, and WAXD. Investigation of thermal properties indicated that the poly(arylene ether ketone)s with porphyrin pendants possessed higher T_gs, and slightly lower decomposition temperatures than the starting copolymers. The results of optical limiting and Z-scan measurements demonstrated that the porphyrinated poly(arylene ether ketone)s exhibited strong optical limiting responses and nonlinear absorption properties with the nonlinear absorption coefficient ¦Â in the order of 10^-9 (m W^-1) magnitude. The effects of pendant porphyrin structure on the thermal, mech., linear and nonlinear optical properties of the poly(arylene ether ketone)s were investigated in detail. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5COA of Formula: C47H36N4O).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligand design occupies a central place in organic synthesis and catalysis. 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.COA of Formula: C47H36N4O

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