Category: 57709-61-2

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The synthesis is described of a set of new N-heterocyclic compounds which are derivatives of 1,10-phenanthroline. The compounds are designed to be general purpose chelating agents which could function as tri-, tetra- or hexadentate ligands with transition metal ions. Fused-ring molecular components have been included in the design of the compounds so that they may function as binding agents to DNA through intercalation. This includes the synthesis of substituted derivatives of pyrazino[2,3-f][1,10]phenanthroline and dipyrido[3,2-a:2’3′-c]phenazine.

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

Electric Literature of 57709-61-2, In heterogeneous catalysis, the catalyst is in a different phase from the reactants. At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 57709-61-2, name is 1,10-Phenanthroline-2,9-dicarboxylic acid. In an article，Which mentioned a new discovery about 57709-61-2

Actinide selectivity of 1,10-phenanthroline-2,9-dicarboxamide and its derivatives: A theoretical prediction followed by experimental validation

The conventional concept of selective complexation of actinides with soft donor ligands (either S or N donor) has been modified here through exploiting the concept, “intra-ligand synergism”, where a hard donor atom, such as oxygen preferentially binds to trivalent actinides [An(iii)] as compared to the valence iso-electronic trivalent lanthanides [Ln(iii)] in presence of another soft donor centre. We have theoretically predicted the selectivity of 1,10-phenanthroline-2,9-dicarboxylamide towards the Am(iii) ion through density functional calculations. Subsequently, several such amide derivatives have been synthesized to optimize the solubility of the ligands in the organic phase. Finally, solvent extraction experiments have been carried out to validate our theoretical prediction on the selectivity of mixed donor ligands towards Am(iii) as compared to Eu(iii), and a maximum separation factor of about 51 has been achieved experimentally using the 2,9-bis(N-decylaminocarbonyl)-1,10-phenanthroline ligand. This journal is

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.57709-61-2. In my other articles, you can also check out more blogs about 57709-61-2

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

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Formula: C14H8N2O4, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 57709-61-2, Name is 1,10-Phenanthroline-2,9-dicarboxylic acid, molecular formula is C14H8N2O4. In a Article, authors is Zhang, Xinrui£¬once mentioned of 57709-61-2

Towards understanding the correlation between UO22+ extraction and substitute groups in 2,9-diamide-1,10-phenanthroline

2,9-Diamide-1,10-phenanthroline (DAPhen) ligands represent a new family of tetradentate extractants given their strong affinity to actinides and the CHON principle. Among this family, N,N?-diethyl-N,N?-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen), initially reported by us, exhibits excellent selectivity towards actinides (U, Th, Am, Pu) over lanthanides and thus can be potentially applied in the group actinide extraction (GANEX) process for the group separation of actinides. In this article, by tailoring the lengths of alkyl chains, we synthesized other four DAPhen ligands with different substitute groups in the diamide moieties, and characterized the relationship between properties and substitute groups of DAPhen ligand. The extraction results show that three of the ligands exhibit high performance in UO22+ extraction from an acidic solution and the extracted UO22+ can be easily stripped by only using ultrapure water. Spectrophotometry titration confirms that UO22+ combined with all the four ligands in 1:1 mode. The extended X-ray absorption finestructure (EXAFS) study shows that six donor atoms comprise the first equatorial shell of the UO22+ ions bonded by the DAPhen ligands, among which two nitrogen and two oxygen atoms are from the DAPhen ligand, while other two oxygen atoms are from one nitrate ions. This article promises to provide basic data for assessing the feasibility of this kind of DAPhen ligands applied in actinides separation from nuclear wastes.

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

Synthetic Route of 57709-61-2, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 57709-61-2, Name is 1,10-Phenanthroline-2,9-dicarboxylic acid, molecular formula is C14H8N2O4. In a Review£¬once mentioned of 57709-61-2

Lanthanides complexes ? Chiral sensing of biomolecules

Thanks to their dimensional versatility and ability to form complexes, lanthanides are increasingly employed for the chiral sensing of biomolecules. In this work two sensing techniques based on the coordination chemistry of lanthanides are reviewed in detail. Circular dichroism (CD) spectroscopy exploits the coupling or binding of lanthanide complexes with chiral substrates, enabling their detection and study. This method is usually employed for the characterization of large biomolecules, i.e. DNA, proteins or amino acids, as well as anion-selective sensing and recognition. Circular polarized luminescence (CPL) can be efficiently employed for the detection of biological molecules when lanthanides are used as probes. In fact, their complexes result in great interest because their emission spectra can contain information about the symmetry and composition of the biomolecules.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Synthetic Route of 57709-61-2, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 57709-61-2, in my other articles.

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

Synthetic Route of 57709-61-2, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.57709-61-2, Name is 1,10-Phenanthroline-2,9-dicarboxylic acid, molecular formula is C14H8N2O4. In a article£¬once mentioned of 57709-61-2

Highly Selective Sensing of Cd(II) Ion by Hexanuclear Functionalized Zn(II) Cluster

The organic ligand 1,10-phenanthroline-2,9-dicarboxylic acid (H2L) was used to react with ZnSO4¡¤7H2O at 140?C for two days to obtain the complex [Zn6(L)6(H2SO4)]¡¤3CH3CN¡¤Et3N (1). The structure of complex is confirmed by X-ray crystallography, TG and PXRD. The structure suggested that six ligands chelated with six Zn2+ ions. Every five-coordinated Zn(II) ion is surrounded by two N atoms and three O atoms (one sulfate radical or three ligands) with the N2O3 coordination environment. Each Zn(II) ion in the structure of complex 1 binds only one L2? ligand. The metal center Zn2 and Zn3 are bridged by SO4 2?. The photoluminescence of complex 1 is obvious. Moreover, in the presence of Cd2+ ions, the complex exhibits an efficient recognition ability, and it realizes the recognition of toxic metal ions.

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

Electric Literature of 57709-61-2, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.57709-61-2, Name is 1,10-Phenanthroline-2,9-dicarboxylic acid, molecular formula is C14H8N2O4. In a Article£¬once mentioned of 57709-61-2

Complexation of NpV ions with 1,10-phenanthroline-2,9-dicarboxylic acid: Spectrophotometric and microcalorimetric studies

The complexation of NpV ions with a tetradentate ligand with oxygen and nitrogen donors, 1,10-phenanthroline-2,9-dicarboxylic acid (denoted as H2L), was studied in aqueous solutions by spectrophotometric and calorimetric methods. NpV ions form a very strong 1:1 complex, NpO2L-, with the stability constant log beta = 11.73 ¡À 0.02 in 0.1 M NaClO4 at 25 C. It is a much stronger complex than those of NpV ions with related ligands such as picolinic acid or dipicolinic acid, as the higher denticity of 1,10-phenanthroline-2,9-dicarboxylic acid results in a larger entropic effect on the complexation. It is expected that the amide derivatives of 1,10-phenanthroline-2,9-dicarboxylic acid would be excellent extractants in the separation of NpV ions, which are problematic in actinide separation processes owing to their very low extractability by many extractants.

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

Electric Literature of 57709-61-2, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.57709-61-2, Name is 1,10-Phenanthroline-2,9-dicarboxylic acid, molecular formula is C14H8N2O4. In a Article£¬once mentioned of 57709-61-2

Complexation of Am(III) and Nd(III) by 1,10-phenanthroline-2,9-dicarboxylic acid

The complexant 1,10-phenanthroline-2,9-dicarboxylic acid (PDA) is a planar tetradentate ligand that is more preorganized for metal complexation than its unconstrained analogue ethylendiiminodiacetic acid (EDDA). Furthermore, the backbone nitrogen atoms of PDA are aromatic, hence are softer than the aliphatic amines of EDDA. It has been hypothesized that PDA will selectively bond to trivalent actinides over lanthanides. In this report, the results of spectrophotometric studies of the complexation of Nd(III) and Am(III) by PDA are reported. Because the complexes are moderately stable, it was necessary to conduct these titrations using competitive equilibrium methods, competitive cation complexing between PDA and diethylenetriaminepentaacetic acid, and competition between ligand protonation and complex formation. Stability constants and ligand protonation constants were determined at 0.1 mol¡¤L-1 ionic strength and at 0.5 mol¡¤L-1 ionic strength nitrate media at 21 ¡À 1 C. The stability constants are lower than those predicted from first principles and speciation calculations indicate that Am3+ selectivity over Nd3+ is less than that exhibited by 1,10-phenanthroline.

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

Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 57709-61-2, molcular formula is C14H8N2O4, introducing its new discovery. Quality Control of: 1,10-Phenanthroline-2,9-dicarboxylic acid

An Improved Route for the Synthesis of Guanine Quadruplex Ligand Phen-DC3

The recognition of noncanonical DNA and RNA architectures such as guanine quadruplexes by small molecule ligands has become a promising strategy for anticancer and antiviral applications in recent years, leading to an exponential increase in the number of quadruplex ligands reported in the literature. There is consequently a need for ‘benchmark’ compounds which can be used as controls to facilitate comparisons between novel and previously reported ligands. One candidate for this role is Phen-DC3, which binds with high affinity and selectivity to guanine quadruplexes. To encourage its use in this role, an alternate synthetic route for the production of Phen-DC3 that may be more appropriate for implementation on a large scale is reported. This pathway eliminates the need for several hazardous reagents and increases the overall synthetic yield from 21% to a maximum of 43%.

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

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent£¬ Application In Synthesis of 1,10-Phenanthroline-2,9-dicarboxylic acid, Which mentioned a new discovery about 57709-61-2

Solvent-Driven Conformational Exchange for Amide-Linked Bichromophoric BODIPY Derivatives

The fluorescence lifetime and quantum yield are seen to depend in an unexpected manner on the nature of the solvent for a pair of tripartite molecules composed of two identical boron dipyrromethene (BODIPY) residues attached to a 1,10-phenanthroline core. A key feature of these molecular architectures concerns the presence of an amide linkage that connects the BODIPY dye to the heterocyclic platform. The secondary amide derivative is more sensitive to environmental change than is the corresponding tertiary amide. In general, increasing solvent polarity, as measured by the static dielectric constant, above a critical threshold tends to reduce fluorescence but certain hydrogen bond accepting solvents exhibit anomolous behaviour. Fluorescence quenching is believed to arise from light-induced charge transfer between the two BODIPY dyes, but thermodynamic arguments alone do not explain the experimental findings. Molecular modelling is used to argue that the conformation changes in strongly polar media in such a way as to facilitate improved rates of light-induced charge transfer. These solvent-induced changes, however, differ remarkably for the two types of amide.

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

Chemistry is an experimental science, 57709-61-2, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 57709-61-2, Name is 1,10-Phenanthroline-2,9-dicarboxylic acid

Multifunctional lanthanide coordination polymers

Lanthanide coordination polymers (Ln-CPs) have attracted explosive attention as an emerging type of multifunctional materials in the last decades. The establishment of the permanent porosity within Ln-CPs has enabled them to be a new class of materials for gas adsorption and separation. The unique luminescent properties, tunable emission colors, and various NIR emitting of luminescent Ln-CPs feature them as promising materials for solid-state light (SSL) applications in display devices, sensing and white-light emitting. Taking advantages of collaborative permanent porosities and unique luminescent properties, Ln-CPs are superior to other types of materials for their applications in luminescent chemical sensing, biomedical imaging as well as drug delivery monitoring and treatment. In this review, we focus on recent significant advances on this active research field and provide a comprehensive review on multifunctional Ln-CPs materials for gas adsorption and separation, tunable luminescence, chemical sensing, catalysis, and biomedical applications.

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