Role of chain length and spacers in the organization of long chain Schiff base compounds at air/water and solid/liquid interfaces

2011 ◽  
Vol 519 (16) ◽  
pp. 5616-5622 ◽  
Author(s):  
P. Jasmin Lebanon ◽  
M. Prakash ◽  
A. Dhathathreyan
Keyword(s):  
Schiff Base ◽  
Chain Length ◽  
Liquid Interfaces ◽  
Solid Liquid ◽  
Long Chain

scholarly journals The Role of Chemical Heterogeneity in Surfactant Adsorption at Solid–Liquid Interfaces

2020 ◽  
Vol 16 (11) ◽  
pp. 7135-7147
Author(s):  
Jason Klebes ◽  
Sophie Finnigan ◽  
David J. Bray ◽  
Richard L. Anderson ◽  
William C. Swope ◽  
...  
Keyword(s):  
Chemical Heterogeneity ◽  
Surfactant Adsorption ◽  
Liquid Interfaces ◽  
Solid Liquid

scholarly journals Role of redox-active axial ligands of metal porphyrins adsorbed at solid–liquid interfaces in a liquid-STM setup

2020 ◽  
Vol 11 ◽  
pp. 1264-1271
Author(s):  
Thomas Habets ◽  
Sylvia Speller ◽  
Johannes A A W Elemans
Keyword(s):  
Tunneling Current ◽  
Liquid Interfaces ◽  
Manganese Porphyrins ◽  
Metal Porphyrins ◽  
Axial Ligands ◽  
Redox Active ◽  
Conductive Surface ◽  
Solid Liquid ◽  
Porphyrin Moiety

In a liquid-STM setup environment, the redox behavior of manganese porphyrins was studied at various solid–liquid interfaces. In the presence of a solution of Mn(III)Cl porphyrins in 1-phenyloctane, which was placed at a conductive surface, large and constant additional currents relative to a set tunneling current were observed, which varied with the magnitude of the applied bias voltage. These currents occurred regardless of the type of surface (HOPG or Au(111)) or tip material (PtIr, Au or W). The additional currents were ascribed to the occurrence of redox reactions in which chloride is oxidized to chlorine and the Mn(III) center of the porphyrin moiety is reduced to Mn(II). The resulting Mn(II) porphyrin products were identified by UV–vis analysis of the liquid phase. For solutions of Mn(III) porphyrins with non-redox active acetate instead of chloride axial ligands, the currents remained absent.

Overview

2021 ◽  
pp. 1-40
Author(s):  
C. Julian Chen
Keyword(s):  
Elementary Theory ◽  
Atomic Resolution ◽  
Tunneling Conductance ◽  
Liquid Interfaces ◽  
Covalent Bonds ◽  
Atom Manipulation ◽  
The One ◽  
Atomic States ◽  
Solid Liquid

This chapter presents the basic designs and working principles of STM and AFM, as well as an elementary theory of tunneling and the imaging mechanism of atomic resolution. Three elementary theories of tunneling are presented: the one-dimensional Schrödinger’s equation in vacuum, the semi-classical approximation, and the Landauer formalism. The relation between the decay constant and the work function, and a general expression of tunneling conductance versus tip-sample distance are derived. A brief summary of experimental facts on the mechanism of atomic resolution STM and AFM is presented, which leads to a picture of interplay between the atomic states of the tip and the sample, as well as the role of partial covalent bonds formed between those electronic states. Four illustrative applications are presented, including imaging self-assembed molecules on solid-liquid interfaces, electrochemical STM, catalysis research, and atom manipulation.

Surface properties of a long-chain 10:12 diynoic acid monolayer at air-liquid and solid-liquid interfaces

1987 ◽  
Vol 155 (2) ◽  
pp. 255-266 ◽  
Author(s):  
Norman F. Owens ◽  
David S. Johnston ◽  
David Gingell ◽  
Dennis Chapman
Keyword(s):  
Surface Properties ◽  
Liquid Interfaces ◽  
Solid Liquid ◽  
Long Chain

Soil Chemical Pollution and Aggressive Pathologies

2018 ◽  
Vol 69 (8) ◽  
pp. 2278-2282
Author(s):  
Stelian Ioan Morariu ◽  
Letitia Doina Duceac ◽  
Alina Costina Luca ◽  
Florina Popescu ◽  
Liliana Pavel ◽  
...  
Keyword(s):  
Health Care Professionals ◽  
Scientific Progress ◽  
Volcanic Eruptions ◽  
Chemical Pollution ◽  
Optimal Parameters ◽  
Chemical Pollutants ◽  
Wide Range ◽  
Health Physician ◽  
Solid Liquid

Maintaining the soil in optimal parameters is vital for mankind, given its essential role in providing the alimentary base, as well as its extremely slow formation and regeneration (hundreds or thousands of years). The direct and indirect pollution of the soil and especially its chemical pollution represent a corollary of other types of pollution, given that it is produced by solid, liquid and gaseous residues. It may be involved in a wide range of diseases (respiratory, cardiovascular, digestive, renal, haematological, osteoarticular, neurological) of allergic, infectious, degenerative or neoplastic nature, from infancy to the old age. Although there are natural causes of soil pollution (e.g. volcanic eruptions), most pollutants come from human activities, which are the most incriminated in its pollution, degradation and erosion at an accelerated pace. The growing concern of all nations for the adoption of measures to limit the chemical pollution of the soil is partially found so far in viable and effective solutions intended to combat soil contamination and degradation and ensure its restoration. Chemical industrialization leads to technical and scientific progress, but at the same time it can develop related pathologies, which means that the role of the occupational health physician is essential in ensuring prophylaxis and the early detection of occupational diseases. Besides that, the role of the pediatrician is equally precious for the detection of specific diseases caused by chemical pollutants to children, because they will develop into adults with pathological stigma.The chemical pollution of the soil is a major challenge for ecologists, given that it is an important risk factor for many types of afflictions. It requires maximum attention from civil society, health care professionals and government institutions. The specialist in occupational medicine, as well as the pediatrician bear an essential responsibility in both, prevention and treatment.

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