scholarly journals Fluorescent benzimidazo[1,2-a]quinolines: synthesis, spectroscopic and computational studies of protonation equilibria and metal ion sensitivity

2017 ◽  
Vol 41 (1) ◽  
pp. 358-371 ◽  
Author(s):  
Marijana Hranjec ◽  
Ema Horak ◽  
Darko Babić ◽  
Sanela Plavljanin ◽  
Zrinka Srdović ◽  
...  
Keyword(s):  
Metal Ion ◽  
Computational Studies ◽  
Protonation Equilibria

Novel benzimidazo[1,2-a]quinolines with promising pH and chemosensing properties are experimentally and computationally characterized.

Experimental and computational studies on zeolite-Y encapsulated iron(iii) and nickel(ii) complexes containing mixed-ligands of 2,2′-bipyridine and 1,10-phenanthroline

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 88636-88645 ◽  
Author(s):  
Solomon Legese Hailu ◽  
Balachandran Unni Nair ◽  
Mesfin Redi-Abshiro ◽  
Rathinam Aravindhan ◽  
Isabel Diaz ◽  
...  
Keyword(s):  
Metal Ion ◽  
Zeolite Y ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Computational Studies ◽  
Mixed Ligands ◽  
Flexible Ligands

Mixed ligand complexes of 2,2′-bipyridine and 1,10-phenanthroline with iron(iii) and nickel(ii) have been encapsulated into a zeolite cage by the reaction of zeolite exchanged metal ion with flexible ligands.

scholarly journals A comparative study on the coordination of diglycolamide isomers with Nd(iii): extraction, third phase formation, structure, and computational studies

RSC Advances ◽  
2021 ◽  
Vol 11 (45) ◽  
pp. 27969-27977
Author(s):  
Yaoyang Liu ◽  
Sheng Liu ◽  
Zhibin Liu ◽  
Chuang Zhao ◽  
Chunhui Li ◽  
...  
Keyword(s):  
Comparative Study ◽  
Phase Formation ◽  
Metal Ion ◽  
Computational Studies ◽  
Metal Ion Extraction ◽  
Ion Extraction ◽  
Third Phase ◽  
Third Phase Formation

The inhomogeneous interactions of M–Oamide in the LII ligand result in differences between the metal-ion extraction performances of two isomeric ligands.

Interaction of a Vanadyl Schiff Base Complex with DNA and BSA: A Combination of Experimental and Computational Studies

2020 ◽  
Vol 20 ◽  
Author(s):  
Hamid B. Aliabad ◽  
Maryam Mohamadi ◽  
Soudeh K. Falahati-Pour ◽  
Mohamad R. Hajizadeh ◽  
Danial Abdollahdokht ◽  
...  
Keyword(s):  
Metal Ion ◽  
Schiff Base Complex ◽  
Binding Pocket ◽  
Binding Mode ◽  
Vanadium Complex ◽  
Computational Studies ◽  
Sperm Dna ◽  
Domain I ◽  
Bsa Interaction ◽  
Groove Binding Mode

Background and purpose: Cancer is the primary cause of death in the world. Vanadium (IV), a metal ion complex, has been proposed as an appropriate applicant for cancer treatment. In this study, the interaction of an oxidovanadium (IV) complex [VOL(bipy)] with salmon sperm DNA and bovine serum albumin (BSA) was investigated through experimental and computational approaches Using the results of this experimental study, the mechanism as well as the parameters related to the interaction of [VOL(bipy)] with DNA and BSA was determined. Material and methods: The kinetic DNA and BSA interaction with [VOL(bipy)] was determined using absorption titration and fluorescence quenching, respectively. Moreover, the possible interactions was calculated by molecular docking prediction with available software. Results: The binding constant (Kb) of the complex to DNA was calculated to be 2.34×104 M-1 , indicating a relatively strong interaction between the complex and DNA. It was found that the V(IV) complex interacted with DNA through groove binding mode followed by partial intercalation into the DNA helix. The Kb values obtained for [VOL(bipy)]-BSA interaction were in the range of 1.07×103 -5.82×104 M-1 . The V(IV) complex was found to prefer domain I binding pocket of BSA with the ΔGb value of -7.52 kcal/mol. Conclusion: Both experimental and computational studies confirm the interaction of the Vanadium complex with DNA and BSA. The moderate affinity of [VOL(bipy)] to BSA indicates that this protein is a good candidate for transferring the complex.

Aspects of high-resolution imaging with a scanning ion microprobe

1986 ◽  
Vol 44 ◽  
pp. 750-751
Author(s):  
R. Levi-Setti ◽  
J. M. Chabala ◽  
Y. L. Wang
Keyword(s):  
Metal Ion ◽  
Secondary Ion Mass Spectrometry ◽  
Chromatic Aberration ◽  
Ion Source ◽  
Ion Microprobe ◽  
Emission Pattern ◽  
Intrinsic Resolution ◽  
Resolution Imaging ◽  
20 Nm ◽  
Secondary Ion

We have shown the feasibility of 20 nm lateral resolution in both topographic and elemental imaging using probes of this size from a liquid metal ion source (LMIS) scanning ion microprobe (SIM). This performance, which approaches the intrinsic resolution limits of secondary ion mass spectrometry (SIMS), was attained by limiting the size of the beam defining aperture (5μm) to subtend a semiangle at the source of 0.16 mr. The ensuing probe current, in our chromatic-aberration limited optical system, was 1.6 pA with Ga+ or In+ sources. Although unique applications of such low current probes have been demonstrated,) the stringent alignment requirements which they imposed made their routine use impractical. For instance, the occasional tendency of the LMIS to shift its emission pattern caused severe misalignment problems.

Scanning ion microscopy images

1987 ◽  
Vol 45 ◽  
pp. 180-181
Author(s):  
R. Levi-Setti ◽  
J.M. Chabala ◽  
Y.L. Wang
Keyword(s):  
Metal Ion ◽  
Secondary Emission ◽  
Scanning Method ◽  
Ion Channeling ◽  
Secondary Ions ◽  
High Resolution Images ◽  
Ion Microscopy ◽  
Z Contrast ◽  
Focused Beams ◽  
Microscopy Images

Finely focused beams extracted from liquid metal ion sources (LMIS) provide a wealth of secondary signals which can be exploited to create high resolution images by the scanning method. The images of scanning ion microscopy (SIM) encompass a variety of contrast mechanisms which we classify into two broad categories: a) Emission contrast and b) Analytical contrast.Emission contrast refers to those mechanisms inherent to the emission of secondaries by solids under ion bombardment. The contrast-carrying signals consist of ion-induced secondary electrons (ISE) and secondary ions (ISI). Both signals exhibit i) topographic emission contrast due to the existence of differential geometric emission and collection effects, ii) crystallographic emission contrast, due to primary ion channeling phenomena and differential oxidation of crystalline surfaces, iii) chemical emission or Z-contrast, related to the dependence of the secondary emission yields on the Z and surface chemical state of the target.

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