Acid base phenomena at the n-TiO2/room temperature molten salt interphase

1982 ◽  
Vol 47 (7) ◽  
pp. 1794-1801 ◽  
Author(s):  
R. J. Gale ◽  
A. J. Nozik ◽  
J. Cooper ◽  
R. A. Osteryoung
Keyword(s):  
Cyclic Voltammetry ◽  
Room Temperature ◽  
Surface Coverage ◽  
Dopant Concentration ◽  
Theoretical Models ◽  
Lewis Acidity ◽  
Flat Band ◽  
Acid Base ◽  
Surface Complexes ◽  
Multiple Ligand

Interphasial properties of the n-TiO2/room temperature AlCl3 : 1-butylpyridinium chloride melt system have been studied by cyclic voltammetry and ac impedance methods. Surface faradaic reactions, dependent on the Lewis acidity of the melt and the semiconductor dopant concentration, are thought to be due to ionizable surface complexes. Theoretical models for flat-band shifts with bulk electrolyte acidity may be complex if the surface coverage is variable or if multiple ligand ionization can occur.

Synthesis, Characterization, and Acid - Base Properties of Ruthenium(II) Complexes Containing N-ethyl-4-([1,10]-phenanthroline[5,6 - f]imidazol-2-yl)carbazole

2010 ◽  
Vol 63 (4) ◽  
pp. 700 ◽  
Author(s):  
Li Xu ◽  
Peng-Xin Liu ◽  
Guo-Liang Liao ◽  
Xiang Chen ◽  
Hui Chao ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Nmr Spectroscopy ◽  
1H Nmr ◽  
Elemental Analysis ◽  
1H Nmr Spectroscopy ◽  
Room Temperature ◽  
Emission Spectra ◽  
Ph Effects ◽  
Acid Base ◽  
Polypyridyl Complexes

Three new ruthenium(ii) polypyridyl complexes, [Ru(phen)2(Hecip)]2+ (1), [Ru(phen)(Hecip)2]2+ (2), and [Ru(Hecip)3]2+ (3) complexes (phen = 1,10-phenanthroline, Hecip = N-ethyl-4-([1,10]-phenanthroline[5,6–f]imidazol-2-yl)carbazole) were synthesized and characterized by ES-MS, 1H NMR spectroscopy, elemental analysis, and cyclic voltammetry. The emission spectra of complexes were measured both at room temperature and at 77 K in a 4/1 (v/v) EtOH/MeOH matrix. All three complexes display luminescence properties which are close to that featured by the parent [Ru(phen)3]2+ species. The pH effects on the UV-vis and emission spectra of RuII complexes were also studied, and complexes 1, 2, and 3 were found to act as ‘on–off’ luminescent pH switches with maximum on–off ratios of 17, 230, and 90, respectively.

scholarly journals Computational design of pH-switchable control agents for nitroxide mediated polymerization

2017 ◽  
Vol 19 (34) ◽  
pp. 22678-22683 ◽  
Author(s):  
Ganna Gryn’ova ◽  
Leesa M. Smith ◽  
Michelle L. Coote
Keyword(s):  
Quantum Chemistry ◽  
Room Temperature ◽  
Computational Design ◽  
Acid Base ◽  
Nitroxide Mediated Polymerization

In the present work we use accurate quantum chemistry to evaluate several known and novel nitroxides bearing acid–base groups as pH-switchable control agents for room temperature NMP.

Cyclic Voltammetry of Th(IV) in the Room-Temperature Ionic Liquid [Me3NnBu][N(SO2CF3)2]

2006 ◽  
Vol 45 (4) ◽  
pp. 1677-1682 ◽  
Author(s):  
Anand I. Bhatt ◽  
Noel W. Duffy ◽  
David Collison ◽  
Iain May ◽  
Robert G. Lewin
Keyword(s):  
Cyclic Voltammetry ◽  
Ionic Liquid ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid

Changes in acid base components of blood on storage at room temperature

1970 ◽  
Vol 3 (9) ◽  
pp. 409-414
Author(s):  
Catriona Doran ◽  
Sheila Kenny ◽  
P. J. Leonard
Keyword(s):  
Room Temperature ◽  
Acid Base

New Avenues in Radical Trifluoromethylselenylation with ­Trifluoromethyl Tolueneselenosulfonate

Synlett ◽  
2018 ◽  
Vol 30 (07) ◽  
pp. 777-782 ◽  
Author(s):  
Clément Ghiazza ◽  
Cyrille Monnereau ◽  
Lhoussain Khrouz ◽  
Maurice Médebielle ◽  
Thierry Billard ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Transition Metal ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Room Temperature ◽  
Diazonium Salts ◽  
Metal Free ◽  
Luminescence Measurement ◽  
Stable Reagent ◽  
Shelf Stable

We demonstrated that the shelf-stable reagent trifluoromethyl tolueneselenosulfonate can be involved in radical trifluoromethylselenylation. Upon visible-light irradiation, the homolysis of the reagent could take place at room temperature. This finding is explored for unprecedented C(sp2)–SeCF3 and C(sp3)–SeCF3 processes under transition-metal-free conditions. Mechanistic investigations, including cyclic voltammetry, luminescence measurement, and EPR studies, allowed the proposal of plausible mechanisms.1 Introduction.2 Reactivity of Reagent I with Diazonium Salts3 Reactivity of Reagent I with Alkenes and Alkynes4 Conclusion

Why We Don't Have a Room-Temperature Superconductor—Yet: 1991 MRS Fall Von Hippel Award Address

MRS Bulletin ◽  
1992 ◽  
Vol 17 (7) ◽  
pp. 70-77 ◽  
Author(s):  
T.H. Geballe
Keyword(s):  
French Revolution ◽  
Room Temperature ◽  
American Chemical Society ◽  
Theoretical Models ◽  
Chemical Society ◽  
Research Society ◽  
American Physical Society ◽  
Materials Research ◽  
Disposable Diapers ◽  
American Physical

I would like to raise a question of interest to many of us here today: “Why have we not been able to find a room-temperature superconductor?” I have a scenario for why not that can be illustrated by projecting ahead 98 years. It is 2089, the tercentenary of the French Revolution. The revolt against science that started building up in the last decade of the 20th century has reached a crescendo and a revolutionary tribunal has erected a huge guillotine. Following in the tradition of Lavoisier's trial and execution, the presidents of the Materials Research Society, the American Chemical Society, and the American Physical Society have been found to be enemies of the people and have been sentenced to be guillotined. The president of the Materials Research Society steps up. In his final words, he says: “I have no regrets. We've supplied you with the pole vaults which have made possible a new world's record above 30 feet, we've given you automobile bumpers that prevent damage in crashes at 60 miles per hour, and we've given you tennis rackets that are big enough to allow you to cover from center court to the alley without having to take a step.” With that, he bravely puts his head on the block. Down crashes the knife but inexplicably it stops just before it reaches his neck. According to the rules he steps down a free man. Then the American Chemical Society president steps up and says: “I don't have any regrets either. We have given you body centered cubic diamond that makes it possible to build indestructible houses, we have given you disposable diapers that are biodegradable in 30 seconds, and we've reseeded the stratosphere with ozone. We have done our job.” She courageously puts her head on the block, and the guillotine comes down. Again it stops short and she walks away, a free woman. Then the president of the American Physical Society says: “I don't have any regrets either. We've circled the equator with our newest SSC and have given you the Higgs boson, we've given you light that you can squeeze until it hurts, and we've discovered over 100 theoretical models which should lead to room-temperature superconductors. We haven't given you any real ones because there aren't any—we've tested all the possibilities. But, by the way, while we've been standing here, I've done a back-of-the-envelope calculation and I've found out wha's wrong with this guillotine. If you give me a screwdriver I can fix it.”

An Aluminum Acid‐Base Concentration Cell Using Room Temperature Chloroaluminate Ionic Liquids

1984 ◽  
Vol 131 (12) ◽  
pp. 2887-2892 ◽  
Author(s):  
C. J. Dymek ◽  
J. L. Williams ◽  
D. J. Groeger ◽  
J. J. Auborn
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Acid Base ◽  
Concentration Cell

scholarly journals Utilizing of 1-Hexyl-1-Methyl-Pyrrolidinium Bis (Trifluoromethyl-Sulfonyl) Imide as Medium for Electrochemical Generation of Superoxide Ion-Radical

1970 ◽  
Vol 12 (4) ◽  
Author(s):  
Maan Hayyan ◽  
Farouq S. Mjalli ◽  
Mohd Ali Hashim ◽  
And Inas M. AlNashef
Keyword(s):  
Cyclic Voltammetry ◽  
Ionic Liquid ◽  
Atmospheric Pressure ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid ◽  
Superoxide Ion ◽  
Electrochemical Generation

The superoxide ion-radical was generated and analysed electrochemically using cyclic voltammetry (CV) technique from oxygen dissolved in a room-temperature ionic liquid, 1-Hexyl-1-methyl-pyrrolidinium bis (trifluoromethylsulfonyl) imide, at atmospheric pressure. It was found that the generated superoxide ion was stable which indicates its possible use for further useful applications.ABSTRAK: Ion radikal superoksida dihasil dan dianalisa secara elektrokimia menggunakan teknik voltammetri berkitar (cyclic voltammetry (CV)) daripada oksigen yang dilarutkan dalam larutan ionik pada suhu bilik, 1-Hexyl-1-methyl-pyrrolidinium bis (trifluoromethylsulfonyl) imida, pada tekanan atmosfera. Didapati bahawa ion superoksida yang terhasil adalah stabil. Ini menunjukkan ia berkemungkinan berguna dalam aplikasi lain.

The role of the Lewis acid−base properties in the supramolecular association of 1,2,5-chalcogenadiazoles

2013 ◽  
Vol 91 (5) ◽  
pp. 338-347 ◽  
Author(s):  
Anthony F. Cozzolino ◽  
Philip J.W. Elder ◽  
Lucia Myongwon Lee ◽  
Ignacio Vargas-Baca
Keyword(s):  
Topological Analysis ◽  
Structural Features ◽  
Lewis Acidity ◽  
Electron Localization ◽  
Dispersion Forces ◽  
Acid Base ◽  
Lewis Bases ◽  
The Individual ◽  
Secondary Bonding

The secondary bonding interactions that link the supramolecular structures assembled by 1,2,5-chalcogenadiazoles were analyzed through explicit orthogonalization of molecular orbitals (NBO), topological analysis of the electron density (AIM), and the electron localization function (ELF). The results of these analyses are consistent with a bonding description that attributes important covalent and electrostatic character to these interactions. Application of these analyses to the individual molecules highlighted the structural features from which each of those contributions originates, namely the polarity and modest strength of the E–N bond. Both of these effects increase along the series S, Se, Te. Perturbations to the heterocycle electronic structure that result in a weaker and more polar E–N bond cause an increase in the Lewis acidity at the chalcogen centre, which in turn leads to stronger secondary bonding interactions with Lewis bases. Additionally, the contribution of dispersion forces is not negligible and is most important in the case of sulfur.

Sign in / Sign up

Export Citation Format

Share Document