Analysis of the complexation process between starch molecules and trilinolenin

The aim of this study is to determine the Cu(II) complexing capacity and stability constants of Cu(II) complexes of humic acids isolated from two well-characterized raised bog peat profiles in respect to the basic properties and humification characteristics of the studied peats and their humic acids. The complex stability constants significantly change within the studied bog profiles and are well correlated with the age and decomposition degree of the peat layer from which the humic acids have been isolated. Among factors that influence this complexation process, molecular mass and ability to form micellar structures (supramolecules) of humic substances are of key importance.

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Synthesis of porphyrins with pendant arms: Participation of the ancillary ligands to the complexation process in proteic medium

Tetrahedron Letters ◽

10.1016/0040-4039(95)00101-h ◽

1995 ◽

Vol 36 (10) ◽

pp. 1665-1666 ◽

Cited By ~ 1

Author(s):

Céline Latouche ◽

Michel Pereyre ◽

Jean-Baptiste Verlhac ◽

Laurent Mauclaire ◽

Jean-Claude Saccavini

Keyword(s):

Ancillary Ligands ◽

Pendant Arms ◽

Complexation Process

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FLUORESCENCE INVESTIGATION ON THE COMPLEXATION PROCESS OF COUMARIN-CYCLODEXTRIN SYSTEMS

Acta Physico-Chimica Sinica ◽

10.3866/pku.whxb19860603 ◽

1986 ◽

Vol 2 (06) ◽

pp. 493-498

Author(s):

Zhang Xingkang ◽

◽

Chen Jianxin ◽

Wan Chaozhi ◽

Liu Li ◽

...

Keyword(s):

Complexation Process

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Fast electrodeposition of zinc onto single zinc nanoparticles

Journal of Solid State Electrochemistry ◽

10.1007/s10008-020-04539-9 ◽

2020 ◽

Vol 24 (11-12) ◽

pp. 2695-2702 ◽

Cited By ~ 1

Author(s):

Giorgia Zampardi ◽

Richard G. Compton

Keyword(s):

Particle Collision ◽

Metallic Zinc ◽

Applied Potential ◽

Single Particles ◽

Zinc Deposition ◽

Zinc Nanoparticles ◽

Negative Electrodes ◽

Particle Level ◽

Complexation Process ◽

Zn Nanoparticles

Abstract The zinc deposition reaction onto metallic zinc has been investigated at the single particle level through the electrode-particle collision method in neutral solutions, and in respect of its dependence on the applied potential and the ionic strength of a sulphate-containing solution. Depending on the concentration of sulphate ions in solution, different amounts of metallic zinc were deposited on the single Zn nanoparticles. Specifically, insights into the electron transfer kinetics at the single particles were obtained, indicating an electrically early reactant-like transition state, which is consistent with the rate-determining partial de-hydration/de-complexation process. Such information on the reaction kinetics at the nanoscale is of vital importance for the development of more efficient and long-lasting nanostructured Zn-based negative electrodes for Zn-ion battery applications.

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Super Extended Calix[4]Pyrroles as Candidate for Binding Mercury

Oriental Journal Of Chemistry ◽

10.13005/ojc/340615 ◽

2018 ◽

Vol 34 (6) ◽

pp. 2789-2795

Author(s):

Maan Al-Nuaim ◽

H. N. K. AL-Salman ◽

Hussein H. Hussein

Keyword(s):

Thermodynamic Parameters ◽

Organic Solvents ◽

1H Nmr ◽

Strong Interaction ◽

Ester Group ◽

Hydroxyl Group ◽

Ester Derivative ◽

Anion Complexation ◽

Calorimetric Studies ◽

Complexation Process

The binding of mercury Hg (II) by calix[4]pyrrole derivative; 2 has been much less discovered than anion complexation. The presence of hydroxyl group in the structure of meso-tetramethyl-tetrakis-[2(4-hydroxyphenyl)ethylcalix[4]pyrrole is important for further modifications in the next steps. The modification of the hydroxyl group by the substitution of ester group was carried out to produce the ester derivative for the modified calix[4]pyrrole 2. The ester group would be expected to deliver high electronic contributions in the complexation processes with the guests as well as to increase the solubility of the receptor in different organic solvents. 1H NMR and isothermal titration calorimetric studies revealed that the receptors exhibited strong interaction with mercury cation and the complexation process was driven enthalpically and entropically. Conductance measurements in acetonitrile were carried out to identify the composition of the formed complex. From Nano Isothermal Titration Calorimetric studies, the thermodynamic parameters for the complexation processes were calculated.

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Study of a complexation process between naltrexone and Eudragit® L as an oral controlled release system

International Journal of Pharmaceutics ◽

10.1016/s0378-5173(96)04849-1 ◽

1997 ◽

Vol 148 (2) ◽

pp. 219-230 ◽

Cited By ~ 6

Author(s):

J. Alvarez-Fuentes ◽

I. Caraballo ◽

A. Boza ◽

J.M. Llera ◽

M.A. Holgado ◽

...

Keyword(s):

Controlled Release ◽

Release System ◽

Controlled Release System ◽

Complexation Process

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Polymer Complexation by Hydrogen Bonding at the Interface

Australian Journal of Chemistry ◽

10.1071/ch13485 ◽

2014 ◽

Vol 67 (1) ◽

pp. 11 ◽

Cited By ~ 19

Author(s):

Shuguang Yang ◽

Songmei Ma ◽

Chunyan Wang ◽

Jian Xu ◽

Meifang Zhu

Keyword(s):

Hydrogen Bonding ◽

Polymer Complex ◽

Layer By Layer ◽

Polymer Complexes ◽

Layer By Layer Assembly ◽

Long Time ◽

Assembly Technique ◽

Kinetics Of ◽

Complexation Process ◽

Layer Assembly

Polymer complexes can form in the bulk and at interfaces. Polymer complex formation in the bulk has been studied for a long time. The recently developed layer-by-layer assembly technique well realizes polymer complexation at interfaces. The layer-by-layer assembly of polymers based on Coulomb forces or hydrogen bonding is a repeated complexation process conducted at a surface. This paper reviews both single (once only) and repeatable interfacial complexation by hydrogen bonding, the available hydrogen bonding pairs for complexation, the thermodynamics and kinetics of complexation, and construction schemes.

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Novel ion-binding C3 symmetric tripodal triazoles: synthesis and characterization

Open Chemistry ◽

10.2478/s11532-013-0351-z ◽

2014 ◽

Vol 12 (1) ◽

pp. 115-125 ◽

Cited By ~ 1

Author(s):

Gábor Neumajer ◽

Gergő Tóth ◽

Szabolcs Béni ◽

Béla Noszál

Keyword(s):

2D Nmr ◽

Ion Binding ◽

The Novel ◽

Spectrometric Data ◽

Polydentate Ligands ◽

Nmr Techniques ◽

Sonogashira Reactions ◽

Symmetric Ligands ◽

Complexation Process

AbstractNovel C3 symmetric tripodal molecules were synthesized from cyclohexane 1,3,5-tricarboxylic acid. Utilizing click and Sonogashira reactions, ion-binding triazole and pyridazin-3(2H)-one units were incorporated to form polydentate ligands for ion complexation. The structures of the novel C3 symmetric derivatives were extensively characterized by 1H, 13C and 2D NMR techniques along with HRMS and IR. The copper(I)-binding potentials of these ligands were investigated by using them as additives in model copper(I)-catalysed azide-alkyne cycloaddition (CuAAC) reactions. The copper(I) complexation ability of our compound was also proved by different spectroscopic methods, such as mass spectrometry, UV and NMR spectroscopy. Based on the mass spectrometric data all of the C3 symmetric ligands formed 1:1 complex with copper(I) ion. The specific role of C3 symmetric polydentate form in the complexation process was also discussed

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Study on the Reaction Process of Ploy-High-Ferric-Silicic Coagulant

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.156-157.1074 ◽

2010 ◽

Vol 156-157 ◽

pp. 1074-1077

Author(s):

Yan Zhen Yu ◽

Juan Tan ◽

Yong Sun

Keyword(s):

Particle Size ◽

Electron Microscope ◽

Theoretical Basis ◽

Raw Materials ◽

Particle Size Analysis ◽

Synthesis Process ◽

Size Analysis ◽

Potassium Ferrate ◽

Transmission Electron ◽

Complexation Process

A new inorganic polymer coagulant，ploy-high-ferric-silicic coagulant with various Si/FeO42- ratios and salt-basicity, was prepared using the fly ash extract and potassium ferrate. The influence of both Si/FeO42- ratios and salt-basicity on the complexation process was explored with many analytical methods, such as transmission electron microscope (TEM), lased particle size analysis (LPSA) and infrared spectrum (IR). The results show that the ploy-high-ferric-silicic is a complexation compound, instead of a simple mixture of raw materials. The complexation process between Si and Fe may be different from various Si/FeO42- ratios and salt-basicity. The bonding can help revealing the high-ferric groups function in synthesis process. From analyzing the different ferrosilicon bonding modes, it can provide some theoretical basis to compound high-ferric coagulant.

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Superelectrophilicity in Michael-Type Reactions: Water Addition to 4-Nitrobenzodifuroxan

Synthesis ◽

10.1055/s-0036-1590839 ◽

2017 ◽

Vol 49 (15) ◽

pp. 3453-3459 ◽

Cited By ~ 1

Author(s):

Sami Lakhdar ◽

Guillaume Berionni ◽

François Terrier

Keyword(s):

Aqueous Solution ◽

Nucleophilic Additions ◽

Water Addition ◽

Meldrum’S Acid ◽

Thermodynamic Measurements ◽

Michael Acceptors ◽

Activated Olefins ◽

Ph Range ◽

Electrophilic Character ◽

Complexation Process

Kinetic and thermodynamic measurements of the ease of covalent hydration of 4-nitrobenzodifuroxan (NBDF) to give the corresponding hydroxy adduct has been carried out over a large pH range of 0.82–12.23 in aqueous solution. A most important result is that water is the sole efficient nucleophile contributing to the hydration of this peculiar nitroolefin in the pH range 4–8. Based on this finding as well as a pK a H2O value of 2.85 for the complexation process there is no doubt that the electrophilic character of NBDF falls in the domain of superelectrophilicity defined with reference to covalent nucleophilic additions to 4,6-dinitrobenzofuroxan (DNBF; pK a H2O = 3.75) and related heterocycles. This also corresponds to a positioning of NBDF at the top of the electrophilicity scale E introduced by Mayr to describe the feasibility of nucleophilic-electrophilic combinations. Returning to the hydration of the series of activated olefins, it has been possible to expand the domain of reactivity of Michael acceptors by six orders of magnitude, going from benzylidenemalonitrile (pK a H2O = 10.70; E = –9.42) to the para-nitro-substituted benzylidene Meldrum’ s acid (pK a H2O = 3.46; E = –5.49). The positioning of these olefins on the pK a scale shows that not only 4-nitrobenzodifuroxan but also the unsubstituted Meldrum’s acid are located in the superelectrophilic region.

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