Novel amphiphilic conjugates of p-tert-butylthiacalix[4]arene with 10,12-pentacosadiynoic acid in 1,3-alternate stereoisomeric form. Synthesis and chromatic properties in the presence of metal ions

2018 ◽  
Vol 42 (4) ◽  
pp. 2942-2951 ◽  
Author(s):  
Vladimir Burilov ◽  
Alsu Valiyakhmetova ◽  
Diana Mironova ◽  
Elza Sultanova ◽  
Vladimir Evtugyn ◽  
...  
Keyword(s):  
Metal Ions ◽  
Lanthanide Ions ◽  
Colorimetric Response ◽  
Chromatic Properties

Functional polydiacetylene vesicles based on thiacalix[4]arene–10,12-pentacosadiynoic acid conjugates showed selective colorimetric response toward lanthanide ions.

scholarly journals Participation of γ-Carboxyglutamic Acid Residues in Metal Binding: 13C nmr Studies of The Interaction of Lanthanide Ions with Bovine Prothrombin Fragment (12-44)

1977 ◽  
Author(s):  
B.C. Furie ◽  
M. Blumenstein ◽  
B. Furie
Keyword(s):  
Metal Ions ◽  
Metal Binding ◽  
Tertiary Structure ◽  
Chemical Shifts ◽  
Lanthanide Ions ◽  
Nmr Studies ◽  
Prothrombin Fragment ◽  
Carboxyglutamic Acid ◽  
The Relationship ◽  
Carboxyl Carbon

Comparative studies of Ca(II) binding to bovine prothrombin and abnormal prothrombin have led to the hypothesis that γ-carboxyglutamic acid (Gla) residues either participate directly in metal liganding or stabilize the tertiary structure of the protein to facilitate metal binding, or both. Extending previous studies of the binding of lanthanide ions to factor X, prothrombin and prothrombin fragment 1, the interaction of lanthanide ions with prothrombin fragment (12-44), which contains eight Gla residues, has been examined by natural abundanceC NMR spectroscopy at 67.88 mHz. The relationship between bound metal ions and carbon atoms in fragment (12-44) was determined using paramagnetic Pr(III) and Eu(III) based upon the strategy that the magnitude of the change in the chemical shift of resonances of the carbon atoms induced by bound metals is related to the interatomic distance between bound metal and carbon nuclei. Assignments of the resonances in the 13C spectrum of fragment (12-44) were based upon our studies of the chemical shifts of carbon resonances in DL-Gla and known chemical shifts of carbon resonances of the other amino acid residues. Titration of fragment (12-44) with Pr(III) or Eu(III) was accompanied by a downfield or upfield shift, respectively, of the γ-carboxyl carbon resonances and no shifts were observed for other carbon resonances. The shift of resonances within the γ-carboxyl carbon envelope appeared selective, suggesting the non-equivalence of the relationship of the γ-carboxyl group of the eight Gla residues to the bound metal ions. These data offer direct evidence that some, but perhaps not all, Gla residues participate in metal liganding.

Complexation studies of 3-substituted β-diketones with selected d- and f-metal ions

2011 ◽  
Vol 65 (2) ◽  
Author(s):  
Grzegorz Pawlicki ◽  
Bartosz Staniszewski ◽  
Katarzyna Witt ◽  
Włodzimierz Urbaniak ◽  
Stefan Lis
Keyword(s):  
Metal Ions ◽  
Absorption Spectra ◽  
Lanthanide Ions ◽  
Computer Assisted ◽  
Hypersensitive Transition ◽  
Complexation Studies ◽  
Target Factor Analysis ◽  
Derivatives Of ◽  
Hypersensitive Transitions

AbstractResults of spectroscopic investigations related to complex compositions of 3-substituted derivatives of pentane-2,4-dione (β-diketonate) complexes with chosen d- and f-metal ions are presented. Ligands 3-allylacetylacetone (3all-acac) and 3-benzylacetylacetone (3ben-acac) were prepared and used for the complexation study with Cu(II), Co(II), Nd(III), and Ho(III) metal ions. Based on the absorption spectra of lanthanide ions in their hypersensitive transitions, with the use of computer assisted target factor analysis (CAT) and absorption spectra of the ligands with Cu(II) and Co(II), the verification of complex compositions and the determination of their stability constants were achieved. In case of Nd(III) and Ho(III) complexes with β-diketone ligands, absorption of their maxima were studied in the range of hypersensitive transitions 4 I 9/2 → 4 F 7/2 + 4 S 3/2 (λ max ∼ 734 nm and 748 nm) for Nd(III) and in the range of 435–465 nm, corresponding to the hypersensitive transition 5 G 6 → 5 I 8 (λ max ∼ 450 nm), for Ho(III).

Sugar interaction with metal ions. The coordination behavior of neutral galactitol to Ca(II) and lanthanide ions

2002 ◽  
Vol 337 (16) ◽  
pp. 1485-1493 ◽  
Author(s):  
Limin Yang ◽  
Yunlan Su ◽  
Wei Liu ◽  
Xianglin Jin ◽  
Jinguang Wu
Keyword(s):  
Metal Ions ◽  
Lanthanide Ions ◽  
Coordination Behavior

scholarly journals “Clickable” thiacalix[4]arene derivatives bearing polymerizable 1,3-butadiyne fragments: synthesis and incorporation into polydiacetylene vesicles

RSC Advances ◽  
2016 ◽  
Vol 6 (50) ◽  
pp. 44873-44877 ◽  
Author(s):  
Vladimir Burilov ◽  
Alsu Valiyakhmetova ◽  
Diana Mironova ◽  
Roman Safiullin ◽  
Marsil Kadirov ◽  
...  
Keyword(s):  
Lanthanide Ions ◽  
Good Basis ◽  
Colorimetric Response ◽  
Express Analysis ◽  
Pda Vesicles

Thiacalix[4]arene-functionalized polydiacetylene (PDA) vesicles showed selective colorimetric response toward several lanthanide ions. This approach can be a good basis for lanthanide express analysis.

scholarly journals Effect of Hydrogen Peroxide Content on the Preparation of Peroxotitanate Materials for the Treatment of Radioactive Wastewater

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Wein-Duo Yang ◽  
Chau Thanh Nam ◽  
Jen-Chien Chung ◽  
Hsin-Ya Huang
Keyword(s):  
Hydrogen Peroxide ◽  
Ion Exchange ◽  
Radioactive Waste ◽  
Metal Ions ◽  
Titanium Isopropoxide ◽  
Amorphous Structure ◽  
Exchange Capacity ◽  
Lanthanide Ions ◽  
Ion Exchange Capacity ◽  
Peroxide Content

The modification of peroxotitanate using hydrogen peroxide significantly improved the ion-exchange capacity of titanate materials as sorbents for metal ions contained in a radioactive waste simulant solution. The effects of hydrogen peroxide content (hydrogen peroxide/titanium isopropoxide molar ratios, hereafter expressed as H/T) on the properties of as-prepared titanate synthesized at 130°C and at pH of 6-7, followed by freeze-drying, were investigated. The peroxotitanate materials thus obtained were characterized by XRD, BET, SEM, TEM, EDX, ICP, and Raman spectroscopy. At an H/T ratio of 2, peroxotitanate predominantly exhibited an amorphous structure, with a clearly observed tubular or fibrous structure. Furthermore, peroxotitanate modified at an H/T ratio of 2 exhibited the best ion-exchange capacity of 191 mg g−1 for metal ions contained in a radioactive waste simulant solution. Hence, these peroxotitanate materials are suitable for removing metal ions from wastewater, especially lanthanide ions (Ln3+) and Sr2+.

scholarly journals Luminescent Properties of Lanthanoid-Poly(Sodium Acrylate) Composites: Insights on the Interaction Mechanism

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1314
Author(s):  
Alan F. Y. Matsushita ◽  
María José Tapia ◽  
Alberto A. C. C. Pais ◽  
Artur J. M. Valente
Keyword(s):  
Metal Ions ◽  
Polymer Composites ◽  
Metal Ion ◽  
Interaction Mechanism ◽  
Green Emission ◽  
Luminescent Properties ◽  
Lanthanide Ions ◽  
Molar Ratio ◽  
Sodium Acrylate ◽  
Wide Range

The interaction between polyelectrolytes and metal ions is governed by different types of interactions, leading to the formation of different phases, from liquid state to weak gels, through an appropriate choice of metal ion/polyelectrolyte molar ratio. We have found that lanthanide ions, europium(III) and terbium(III), are able to form polymer composites with poly(sodium acrylate). That interaction enhances the luminescent properties of europium(III) and terbium(III), showing that Eu3+/poly(sodium acrylate) (PSA) and Tb3+/PSA composites have a highly intense red and green emission, respectively. The effect of cations with different valences on the luminescent properties of the polymer composites is analyzed. The presence of metal ions tends to quench the composite emission intensity and the quenching process depends on the cation, with copper(II) being by far the most efficient quencher. The interaction mechanism between lanthanoid ions and PSA is also discussed. The composites and their interactions with a wide range of cations and anions are fully characterized through stationary and non-stationary fluorescence, high resolution scanning electronic microscopy and X-ray diffraction.

scholarly journals Lanthanide ion-doped silica nanohelices: helical inorganic network acts as chiral source for metal ions

2021 ◽  
Author(s):  
Tomoyuki Harada ◽  
Hiroshi Yanagita ◽  
Naoya Ryu ◽  
Yutaka Okazaki ◽  
Yutaka Kuwahara ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Metal Ions ◽  
Lanthanide Ions ◽  
Lanthanide Ion ◽  
Chiroptical Properties ◽  
Circularly Polarized ◽  
Circular Dichroïsm ◽  
Inorganic Network

We demonstrate that lanthanide ions doped in nanometrical silica helices with chirally arranged siloxane network without any organic mediates show induced chiroptical properties such as circular dichroism and circularly polarized...

scholarly journals The effect of pH and transition metal ions on cysteine-assisted gold aggregation for a distinct colorimetric response

RSC Advances ◽  
2021 ◽  
Vol 11 (19) ◽  
pp. 11255-11255
Author(s):  
Trang Thi Thuy Nguyen ◽  
Olivia A. Han ◽  
Eun Bi Lim ◽  
Seungjoo Haam ◽  
Joon-Seo Park ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Effect Of Ph ◽  
Colorimetric Response

Correction for ‘The effect of pH and transition metal ions on cysteine-assisted gold aggregation for a distinct colorimetric response’ by Trang Thi Thuy Nguyen et al., RSC Adv., 2021, 11, 9664–9674, DOI: 10.1039/D1RA00013F.

scholarly journals Spectral Analysis of Azo Derivatives for their Colorimetric Response to some Special Metal Ions

2021 ◽  
Vol 11 (3) ◽  
pp. 3909-3916
Keyword(s):  
Spectral Analysis ◽  
Metal Ions ◽  
Aqueous Medium ◽  
Spectral Data ◽  
Azo Dyes ◽  
Color Change ◽  
Oh Groups ◽  
Sensing Properties ◽  
Colorimetric Response ◽  
Azo Derivatives

The present study describes an efficient chromogenic probing ability possessed by an azo linkage that could sense Ni, Fe, and Co in the semi-aqueous medium. The chromogenic sensing properties of the four azo dyes were studied towards Fe(III), Co(II), and Ni(II) ions, the IR and UV-VIS spectral data revealed that the nitrogen and oxygen atoms of –N=N-, C=O and –OH groups participated in bonding with the metal ions. Also, an obvious change in the color of the azo dyes A and B solution from yellow to dark brown in the case of Fe+2 metal ions and Co+2 and Ni+2 colorless solutions appeared yellowish, while the addition of other metal ions did not cause any color change. These results imply that the two azo dyes are viable, portable chromogenic chemosensors for the detection of Fe (III), Co (II), and Ni (II) ions in various biological and environmental fields.

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