Catalysis-chemistry

Aluminium(III) porphyrin based dimers and trimers: synthesis, spectroscopy and photochemistry was written by Prashanth Kumar, P.;Maiya, Bhaskar G.. And the article was included in New Journal of Chemistry in 2003.Name: 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol The following contents are mentioned in the article:

The known oxophilicity of Al(III) ion and the well-defined redox and photochem. properties of Al(III) porphyrins were exploited to synthesize the functionally active, ‘axial-bonding’-type free base-Al(III) porphyrin dimer (H₂-Al) and free base-[aluminum(III) porphyrin]₂ trimer (H₂-Al₂), as well as the corresponding Cu(II) (Cu-Al, Cu-Al₂) and Zn(II) (Zn-Al, Zn-Al₂) derivatives These dimeric and trimeric species were fully characterized by mass (FAB), UV/visible, ¹H NMR (1-dimensional and ¹H-¹H COSY) and ESR spectroscopies and also by the differential pulse voltammetric method. Comparison of their spectroscopic and electrochem. data with those of the corresponding monomeric porphyrins reveals that there is no apparent ring-to-ring interactions in these ‘vertically’ linked dimers and trimers. The fluorescence quantum yields and singlet state life times are lower for H₂-Al and H₂-Al₂ in comparison with those of the monomeric chromophores. Electronic energy transfer from the Al(III) porphyrin to the free base subunit is detected in both H₂-Al and H₂-Al₂. Finally, a comparison is made between the presently reported Al(III) porphyrin based arrays and the previously reported analogous arrays based on Sn(IV), Ge(IV) and phosphorous(V) porphyrins with regard to their architectural features, spectroscopic properties and photochem. activities. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Name: 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, in chemistry, any atom or molecule attached to a central atom, usually a metallic element, in a coordination or complex compound. Replacing precious metals with cheaper and more environmentally friendly metals is regarded as a highly desirable goal in the field of catalysis.Name: 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol

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

Synthesis of porphyrinyl nucleosides was written by Czuchajowski, Leszek;Habdas, Jan;Niedbala, Halina;Wandrekar, Vinay. And the article was included in Journal of Heterocyclic Chemistry in 1992.Computed Properties of C47H36N4O The following contents are mentioned in the article:

Several porphyrinyl nucleosides were prepared in the reaction of the OH group of one, two, or four meso–p-hydroxyphenyl substituents of porphyrin with 5′-O-tosylates of 2′,3′-O-isopropylidene-adenosine or -uridine, or 5′-O-tosylthymidine; the remaining porphyrin meso-substituents were p-tolyl, p-hydroxyphenyl, or 4-pyridyl. The following porphyrinyl nucleosides were obtained with 8-17% yield: meso-di(p-tolyl)di(p-phenylene-5′-O-2′,3′-O-isopropylidene-adenosine) (or -uridine)porphyrins, the resp. meso-tetranucleoside-porphyrins 3,4-meso-mono(p-phenylene-5′-O-thymidine)porphyrins, meso-di(p-tolyl)di(p-phenylene-5′-O-thymidine)porphyrins and the meso-di(p-hydroxyphenyl)di(p-phenylene-5′-O-thymidine)porphyrins. Other compounds prepared belonged to the series: meso-(4-pyridyl)_4-n(p-phenylene-5′-O-2′,3′-O-isopropylideneuridine)_nporphyrin, n = 1,2,4. N-Methylation gave the water soluble iodide salts: (N-methyl-4-pyridinium)_4-n(p-phenylene-5′-O-2′,3′-isopropylideneuridine)_nporphyrins, n = 1, 2,4. The porphyrins meso disubstituted by thymidine represent a convenient substrate for the build-up of both nucleoside units into the oligo/polynucleotide chains. 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, especially phosphines and carbenes, can play a key role in modifying and controlling homogeneous organometallic catalysts. Replacing precious metals with cheaper and more environmentally friendly metals is regarded as a highly desirable goal in the field of catalysis.Computed Properties of C47H36N4O

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

Cyclotriphosphazene ring as a platform for multiporphyrin assemblies was written by Rao, M. Rajeswara;Gayatri, G.;Kumar, Amit;Sastry, G. Narahari;Ravikanth, M.. And the article was included in Chemistry – A European Journal in 2009.Recommanded Product: 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol The following contents are mentioned in the article:

Hexaporphyrin- and hexathiaporphyrin-substituted cyclotriphosphazenes are prepared as well as the zinc and copper complexes of a hexaporphyrin-substituted cyclotriphosphazene. Reaction of hexachlorocyclotriphosphazene with six equivalent of a hydroxyphenyl-substituted porphyrin or thiaporphyrin in THF with cesium carbonate as a base yields hexaporphyrin-substituted and hexathiaporphyrin-substituted cyclotriphosphazenes in 85% and 87% yields, resp.; treatment of the hexaporphyrin-substituted cyclotriphosphazene with either zinc acetate or copper (II) chloride under standard metalation conditions yields the corresponding zinc and copper hexaporphyrin-substituted cyclotriphosphazene complexes. The UV/visible spectra of monomeric porphyrins and thiaporphyrins, the hexaporphyrin- and hexathiaporphyrin-substituted cyclotriphosphazenes, and the zinc and copper hexaporphyrin-substituted cyclotriphosphazene complexes are obtained. The absorption spectra and calculated conformations of the hexaporphyrin-substituted cyclotriphosphazene are determined; the compound forms ringlike structures observed by fluorescence microscopy. The oxidation and reduction potentials of the hexaporphyrin- and hexathiaporphyrin-substituted cyclotriphosphazenes, and the zinc hexaporphyrin-substituted cyclotriphosphazene complex are determined Copper hexaporphyrin-substituted cyclotriphosphazene complex cleaves supercoiled DNA in the absence of added oxidant; neither the hexaporphyrin-substituted cyclotriphosphazene nor copper tetraphenylporphyrin cleave supercoiled DNA under analogous conditions. 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. Ligand, in chemistry, any atom or molecule attached to a central atom, usually a metallic element, in a coordination or complex compound. 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

Synthesis and biological activities of ifosfamide mustard porphyrin dimers was written by Wang, Zhi-wei;Guo, Can-cheng;Tian, Mi;Guo, Lin;Sun, Teng-fei;Guo, Qing-hu. And the article was included in Gaodeng Xuexiao Huaxue Xuebao in 2011.Formula: C47H36N4O The following contents are mentioned in the article:

Ifosfamide is one of the most important clin. alkylating agent due to its frequent use in cancer chemotherapy. It does not exhibit any cytotoxic activities in vitro, and requires hepatic oxidative metabolism in vivo to generate an alkylating ifosfamide mustard, which is regarded as the ultimate intracellular alkylating metabolite. However, its clin. uses are restricted due to they can not distinguish tumor cells from normal cells. Porphyrins could selectively accumulate in tumor tissues than in normal tissues. Based on these facts, an efficient one-pot method for the synthesis of ifosfamide mustard porphyrin dimers was. achieved by treating hydroxyl substituted porphyrin first with POCl₃ then with primary amine. The selective synthesis of ifosfamide mustard porphyrin dimers was achieved simply by controlling the ratio of POCl₃ vs. hydroxy porphyrin and the reaction condition during the phosphonation step. Five ifosfamide mustard porphyrin dimers were synthesized accordingly by this one-pot procedure and their structures were affirmed by MS, ¹H NMR, ³¹P NMR and elemental anal. The MTT tests and the uptake tests showed that ifosfamide mustard porphyrin dimers could selectively accumulate and kill cancer cells. The interaction between ifosfamide mustard porphyrin dimers and bovine serum albumin (BSA) was investigated by fluorescence spectra. The results showed that the ifosfamide mustard porphyrin dimers own a powerful ability of quenching the fluorescence of BSA via static quenching occurring in the non-covalent porphyrin-BSA complex. 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. 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. 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.Formula: C47H36N4O

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

New Molecular Arrays Based on a Tin(IV) Porphyrin Scaffold was written by Kumar, A. Ashok;Giribabu, L.;Reddy, D. Raghunath;Maiya, Bhaskar G.. And the article was included in Inorganic Chemistry in 2001.Application In Synthesis of 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol The following contents are mentioned in the article:

Two new porphyrin arrays, a hexamer and a nonamer, were synthesized and characterized by elemental anal. as well as mass, ¹H NMR, and UV-visible spectroscopic methods. The scheme of construction of these arrays employs a synthetic protocol involving sequential organic and inorganic reactions conducted, resp., at the peripheral meso-Ph ring and the central tin(IV) ion of the porphyrin scaffold. The architecture of the hexamer is such that it is based on a covalently linked tin(IV) porphyrin dimer, with each of the two tin(IV) centers trans-axially ligated to two free-base porphyrins, while the higher homolog features a tin(IV) porphyrin trimer as the basal unit, with its central metalloid ions having two free-base porphyrins as axial ligands. This extended, axial-bonding-type architecture of the new arrays was studied by the ¹H NMR method, which reveals characteristic ring-current-induced shifts and coupling patterns for the resonances due to protons of the axial free-base porphyrin subunits. The presence of any ring-ring (basal-basal, basal-axial, or axial-axial) interaction in these arrays is not obvious from their UV-visible and redox potential data, which are close to those of the corresponding constituent monomeric species. However, their singlet-state activities are quite different from those of the precursor reference compounds as probed by steady-state fluorescence. The results of the detailed studies carried out on these hybrid, bichromophoric arrays were interpreted in terms of the occurrence of intra-array, inter-chromophore energy- and electron-transfer reactions. 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. 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.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

Tuning fullerene miscibility with porphyrin-terminated P3HTs in bulk heterojunction blends was written by Seibers, Zach D.;Collier, Graham S.;Hopkins, Benjamin W.;Boone, Evan S.;Le, Thinh P.;Gomez, Enrique D.;Kilbey, S. Michael II. And the article was included in Soft Matter in 2020.Recommanded Product: 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol The following contents are mentioned in the article:

Understanding and manipulating the miscibility of donor and acceptor components in the active layer morphol. is important to optimize the longevity of organic photovoltaic devices and control power conversion efficiency. In pursuit of this goal, a “porphyrin-capped” poly(3-hexylthiophene) was synthesized to take advantage of strong porphyrin:fullerene intermol. interactions that modify fullerene miscibility in the active layer. End-functionalized poly(3-hexylthiophene) was synthesized via catalyst transfer polymerization and subsequently functionalized with a porphyrin moiety via post-polymerization modification. UV-vis spectroscopy and X-ray diffraction measurements show that the porphyrin-functionalized poly(3-hexylthiophene) exhibits increased intermol. interactions with phenyl-C61-butyric acid Me ester (PCBM) in the solid state compared to unfunctionalized poly(3-hexylthiophene) without sacrificing microstructure ordering that facilitates optimal charge transport properties. Addnl., differential scanning calorimetry revealed porphyrin-functionalized poly(3-hexylthiophene) crystallization decreased only slightly (1-6%) compared to unfunctionalized poly(3-hexylthiophenes) while increasing fullerene miscibility by 55%. Preliminary organic photovoltaic device results indicate device power conversion efficiency is sensitive to additive loading levels, as evident by a slight increase in power conversion efficiency at low additive loading levels but a continuous decrease with increased loading levels. While the increased fullerene miscibility is not balanced with significant increases in power conversion efficiency, this approach suggests that integrating non-bonded interaction potentials is a useful pathway for manipulating the morphol. of the bulk heterojunction thin film, and porphyrin-functionalized poly(3-hexylthiophenes) may be useful additives in that regard. 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. Ligands, especially phosphines and carbenes, can play a key role in modifying and controlling homogeneous organometallic catalysts. 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

Multiporphyrin Arrays on Cyclophosphazene Scaffolds: Synthesis and Studies was written by Pareek, Yogita;Ravikanth, Mangalampalli. And the article was included in Chemistry – A European Journal in 2012.SDS of cas: 57412-08-5 The following contents are mentioned in the article:

The stable and robust cyclotriphosphazene and cyclotetraphosphazene rings were used as scaffolds to prepare hexa- and octaporphyrin arrays by treating N₃P₃Cl₆ and N₄P₄Cl₈, resp., with 5-(4-hydroxyphenyl)-10,15,20-tri(p-tolyl)porphyrin (N₄ core) or with its thiaporphyrin analogs (N₃S and N₂S₂ cores) in THF in the presence of Cs₂CO₃ under simple reaction conditions. Thiaporphyrins were examined in addition to the normal porphyrin to tune the electronic properties of the resultant arrays. Observation of the mol. ion peaks in the mass spectra confirmed the mol. structures of the arrays. 1-dimensional and 2-dimensional NMR techniques were employed to characterize the multiporphyrin arrays. The ¹H NMR spectra of the multiporphyrin arrays each show a systematic set of signals, indicating that the porphyrin units are arranged in a sym. fashion around the cyclophosphazene rings. All signals in the ¹H NMR spectra were assigned with the aid of COSY and NOESY experiments The protons of each porphyrin unit are subject to upfield and downfield shifts because of the ring-current effects of neighboring porphyrin units. Optical, electrochem., and fluorescence studies of the arrays indicated that the porphyrin units retain their independent ground- and excited-state characteristics. Cu^II and Ni^II derivatives of hexaporphyrin and octaporphyrin arrays containing N₄ porphyrin units and N₃S porphyrin units were synthesized, and complete metalation of the arrays was confirmed by their mass spectra and by detailed NMR characterization of the Ni^II derivatives of hexa- and octaporphyrin arrays containing N₄ porphyrin units. Electrochem. studies indicated that Cu^II and Ni^II ions present in the thiaporphyrin units of the arrays can be stabilized in the +1 oxidation state, which is not possible with arrays containing normal porphyrin units. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5SDS of cas: 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. Replacing precious metals with cheaper and more environmentally friendly metals is regarded as a highly desirable goal in the field of catalysis.SDS of cas: 57412-08-5

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

“Axial-Bonding”-Type Hybrid Porphyrin Arrays: Synthesis, Spectroscopy, Electrochemistry, and Singlet State Properties was written by Giribabu, L.;Rao, T. Anita;Maiya, Bhaskar G.. And the article was included in Inorganic Chemistry in 1999.Electric Literature of C47H36N4O The following contents are mentioned in the article:

P(V), Ge(IV), and Sn(IV) porphyrin-based, axial-bonding-type hybrid trimers were readily constructed by employing a new building-block approach. The approach is modular in nature, and it involves simple inorganic reactions such as axial bond formation of main group element containing porphyrins and insertion of metal/metalloid ions into the porphyrin cavity. The architecture of these arrays is such that, while a P(V), Ge(IV), or Sn(IV) complex of meso-5,10,15,20-(tetratolyl)porphyrin forms the basal scaffolding unit, the free-base, vanadyl, Co(II), Ni(II), Cu(II), or Zn(II) porphyrins occupy the two axial sites via an aryloxy bridge. Synthesis of an all-P array containing three P(V) subunits also was accomplished. Each new porphyrin array studied was fully characterized by various phys. methods that include mass (FAB), UV-visible, IR, fluorescence, ESR, and ¹H and ³¹P NMR (NMR; 1-dimensional and 2D) spectroscopies and cyclic voltammetry. The UV-visible and ESR spectral parameters and also the redox potential data suggest that there exists no interaction between the ¦Ð-planes of the constituent monomeric porphyrins in these arrays. Detailed ¹H NMR studies carried out with the trimers containing diamagnetic porphyrins reveal characteristic shielding/deshielding effects for the various protons on the axial porphyrin subunits. The ground state data, as probed by the spectroscopic and electrochem. techniques, collectively indicate that there exists a sym. but nonparallel disposition of the two axial porphyrins with respect to plane of the central porphyrin. Singlet state activity of the photoactive trimers was probed by the steady state fluorescence method with selective excitation into the bands corresponding to the two constituent monomeric species. Anal. of the fluorescence emission and excitation spectral data suggests the occurrence of electronic energy transfer as well as photoinduced electron transfer reactions in trimers endowed with free-base or Zn(II) porphyrin axial subunits. Efficiencies of the excited state processes of these trimeric arrays are dependent on the type of metal/metalloid ions present in the porphyrin crevice. 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. 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. 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.Electric Literature of C47H36N4O

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

Photoregulation of Fluorescence in a Porphyrinic Dithienylethene Photochrome was written by Norsten, Tyler B.;Branda, Neil R.. And the article was included in Journal of the American Chemical Society in 2001.Reference of 57412-08-5 The following contents are mentioned in the article:

Synthesis and optical characterization was reported of a photochromic hybrid (I), where porphyrin macrocycles are attached to the ends of the 1,2-bis(3-thienyl)cyclopentene backbone. The relationship between the luminescence intensity of the porphyrins and the state of the photoswitch (open or closed) was clearly illustrated. The absorption spectrum of bis(porphyrin) I in the UV-vis region was essentially equivalent to the sum of the absorption spectra of the mol.’s components indicating that there was little change in the ground state of either chromophore upon covalent linking. Irradiation of I at 313 nm resulted in an immediate increase in the absorption intensity in the visible spectral region (500-625 nm) due to the appearance of the absorption bands of its closed isomer. After 4 min of continuous irradiation (2 x 10-4 M, toluene-d₈), the photostationary state was reached and was identified by ¹H NMR spectroscopy as consisting of 69% of the closed isomer. The ease at which this photochem. ring closure occurs was impressive in the light of the fact that porphyrins have been reported, on occasion, to inhibit photochromic processes. Irradiation of the closed isomer at ¦Ë >480 nm resulted in the rapid ring-opening photoreaction and e regeneration of the original absorption spectrum corresponding to I. Luminescence of the porphyrin macrocycles in I and its closed isomer greatly depended on the state of the 1,2-(dithienyl)cyclopentene photoswitch. In the open form it displayed significant fluorescence intensity at 655 nm when excited at 430 nm. When the photocyclization reaction was carried out by irradiating at 313 nm, the nonfluorescent closed form was produced. Back irradiation at ¦Ë >480 nm regenerated closed isomer I and restored the original emission spectrum. The intensity of the porphyrins fluorescence was conveniently regulated by toggling between open and closed isomers by alternate irradiation at 313 nm and >480 nm clearly demonstrating that I can act as a system for reversible data processing using fluorescence as the detection method. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Reference of 57412-08-5).

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.Reference of 57412-08-5

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

Supramolecular Tetrad Featuring Covalently Linked Bis(porphyrin)-Phthalocyanine Coordinated to Fullerene: Construction and Photochemical Studies was written by Kc, Chandra B.;Lim, Gary N.;Karr, Paul A.;D’Souza, Francis. And the article was included in Chemistry – A European Journal in 2014.Reference of 57412-08-5 The following contents are mentioned in the article:

A multimodular donor-acceptor tetrad featuring a bis(zinc porphyrin)-(zinc phthalocyanine) ((ZnP-ZnP)-ZnPc) triad and bis-pyridine-functionalized fullerene was assembled by a “two-point” binding strategy, and investigated as a charge-separating photosynthetic antenna-reaction center mimic. The spectral and computational studies suggested that the mode of binding of the bis-pyridine-functionalized fullerene involves either one of the zinc porphyrin and zinc phthalocyanine (Pc) entities of the triad or both zinc porphyrin entities leaving ZnPc unbound. The binding constant evaluated by constructing a Benesi-Hildebrand plot by using the optical data was found to be 1.17¡Á10⁵ M^-1, whereas a plot of “mole-ratio” method revealed a 1:1 stoichiometry for the supramol. tetrad. The mode of binding was further supported by differential pulse voltammetry studies, in which redox modulation of both zinc porphyrin and zinc phthalocyanine entities was observed The geometry of the tetrad was deduced by B3LYP/6-31G* optimization, whereas the energy levels for different photochem. events was established by using data from the optical absorption and emission, and electrochem. studies. Excitation of the zinc porphyrin entity of the triad and tetrad revealed ultrafast singlet-singlet energy transfer to the appended zinc phthalocyanine. The estimated rate of energy transfer (k_ENT) in the case of the triad was found to be 7.5¡Á10¹¹ s^-1 in toluene and 6.3¡Á10¹¹ s^-1 in o-dichlorobenzene, resp. As was predicted from the energy levels, photoinduced electron transfer from the energy-transfer product, i.e., singlet-excited zinc phthalocyanine to fullerene was verified from the femtosecond-transient spectral studies, both in o-dichlorobenzene and toluene. Transient bands corresponding to ZnPc⁺ in the 850 nm range and C₆₀^– in the 1020 nm range were clearly observed The rate of charge separation, k_CS, and rate of charge recombination, k_CR, for the (ZnP-ZnP)-ZnPc⁺:Py₂C₆₀^– radical ion pair (from the time profile of 849 nm peak) were found to be 2.20¡Á10¹¹ and 6.10¡Á10⁸ s^-1 in toluene, and 6.82¡Á10¹¹ and 1.20¡Á10⁹ s^-1 in o-dichlorobenzene, resp. These results revealed efficient energy transfer followed by charge separation in the newly assembled supramol. tetrad. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Reference of 57412-08-5).

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.Reference of 57412-08-5

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