Regioselective phenyl-substitution effects on the solvatochromism of 2-phenylimidazo[1,2-a]pyrazin-3(7H)-one derivatives: expansion of the color variation range of a visible indicator for the proton donor ability of solvents

2004 ◽  
Vol 45 (46) ◽  
pp. 8531-8534 ◽  
Author(s):  
Shunsuke Fujio ◽  
Daisuke Hashizume ◽  
Yoshiharu Takamuki ◽  
Masanori Yasui ◽  
Fujiko Iwasaki ◽  
...  
Keyword(s):  
Proton Donor ◽  
Color Variation ◽  
Substitution Effects ◽  
Variation Range ◽  
Donor Ability

scholarly journals The impact of orally administered gadolinium orthovanadate GdVO4:Eu3+ nanoparticles on the state of phospholipid bilayer of erythrocytes

2020 ◽  
Vol 45 (4) ◽  
pp. 389-395
Author(s):  
Anton Tkachenko ◽  
Anatolii Onishchenko ◽  
Vladimir Klochkov ◽  
Nataliya Kavok ◽  
Oksana Nakonechna ◽  
...  
Keyword(s):  
Fluorescent Probes ◽  
Lipid Membranes ◽  
Chemical Properties ◽  
Proton Donor ◽  
The State ◽  
Phospholipid Bilayer ◽  
Erythrocyte Membranes ◽  
Control Group ◽  
Donor Ability ◽  
The Impact

AbstractObjectivesTo assess the state of phospholipid bilayer of red blood cells (RBCs) in rats orally exposed to gadolinium orthovanadate GdVO4:Eu3+ nanoparticles (VNPs) during two weeks using fluorescent probes − ortho-hydroxy derivatives of 2,5-diaryl-1,3-oxazole.MethodsSteady-state fluorescence spectroscopy: a study by the environment-sensitive fluorescent probes − 2-(2′-OH-phenyl)-5-phenyl-1,3-oxazole (probe O1O) and 2-(2′-OH-phenyl)-phenanthro[9,10]-1,3-oxazole (probe PH7).ResultsNo significant changes are detected in the spectra of the fluorescent probes bound to the RBCs from the rats orally exposed to nanoparticles in comparison with the corresponding spectra of the probes bound to the cells from the control group of animals. This indicates that, in case of the rats orally exposed to nanoparticles, no noticeable changes in physico-chemical properties (i.e., in the polarity and the proton-donor ability) are observed in the lipid membranes of RBCs in the region, where the probes locate.ConclusionsNo changes in the physical and chemical properties of the erythrocyte membranes are detected in the region from glycerol backbones of phospholipids to the center of the phospholipid bilayer in the rats orally exposed to VNPs during 2 weeks.

Influence of chlorine-substitution in pyrimidine ring on proton donor ability in H-bond and parameters of amino group of 2-amino pyrimidine

2005 ◽  
Vol 37 (1) ◽  
pp. 97-109 ◽  
Author(s):  
V.E. Borisenko ◽  
S.A. Krekov ◽  
M.A. Niyazova ◽  
A. Koll ◽  
P. Lipkowski
Keyword(s):  
Pyrimidine Ring ◽  
Proton Donor ◽  
Amino Group ◽  
Chlorine Substitution ◽  
Donor Ability ◽  
Amino Pyrimidine

scholarly journals Dual-color blending based visual LAMP for food allergen detection: a strategy with enlarged color variation range and contrast

2021 ◽  
pp. 100201
Author(s):  
Fang Zhang ◽  
Chenshan Gao ◽  
Linlin Bai ◽  
Yiquan Chen ◽  
Shuying Liang ◽  
...  
Keyword(s):  
Food Allergen ◽  
Color Variation ◽  
Dual Color ◽  
Allergen Detection ◽  
Variation Range ◽  
Color Blending

Proton donor ability of surface hydroxy groups from the IR spectra of hydrogen-bonded complexes

1978 ◽  
Vol 9 (3) ◽  
pp. 265-268 ◽  
Author(s):  
E. A. Paukshtis ◽  
L. G. Karakchiev ◽  
N. S. Kotsarenko
Keyword(s):  
Ir Spectra ◽  
Proton Donor ◽  
Donor Ability ◽  
Hydroxy Groups ◽  
Bonded Complexes ◽  
Hydrogen Bonded

IR-spectroscopic evaluation of proton-donor ability of HCl, HBr, HI acids and HSO3CF3, HClO4, HGeCl3, HAlCl4 superacids

1983 ◽  
Vol 32 (3) ◽  
pp. 636-637
Author(s):  
V. B. Kazanskii ◽  
O. M. Nefedov ◽  
A. A. Pankov ◽  
V. Yu. Borovkov ◽  
S. P. Kolesnikov ◽  
...  
Keyword(s):  
Proton Donor ◽  
Donor Ability ◽  
Ir Spectroscopic

scholarly journals The inhibition of the proton donor ability of bicarbonate promotes the electrochemical conversion of CO2 in bicarbonate solutions

2021 ◽  
Vol 48 ◽  
pp. 101521
Author(s):  
Oriol Gutiérrez-Sánchez ◽  
Nick Daems ◽  
Willem Offermans ◽  
Yuvraj Y. Birdja ◽  
Metin Bulut ◽  
...  
Keyword(s):  
Proton Donor ◽  
Electrochemical Conversion ◽  
Donor Ability ◽  
Bicarbonate Solutions

Structure and proton-donor ability of N-(1-trifluoromethylsulfonylamino-2,2,2-trichloroethyl)-acrylamide

2009 ◽  
Vol 79 (6) ◽  
pp. 1146-1151 ◽  
Author(s):  
L. P. Oznobikhina ◽  
N. N. Chipanina ◽  
B. A. Shainyan ◽  
T. N. Aksamentova ◽  
E. V. Kondrashov ◽  
...  
Keyword(s):  
Proton Donor ◽  
Donor Ability

scholarly journals Acidity of HOCN, HSCN, HNCO, HNCS: A treatment from the viewpoint of ab initio approach

2005 ◽  
Vol 70 (10) ◽  
pp. 1183-1192 ◽  
Author(s):  
Alexei Pankratov ◽  
Sergei Khmelev
Keyword(s):  
Electronic Structure ◽  
Ab Initio ◽  
Thermodynamic Stability ◽  
Electronic Structures ◽  
Proton Donor ◽  
Electronic Correlation ◽  
Medium Effects ◽  
General Sequence ◽  
Donor Ability ◽  
Ab Initio Approach

The electronic structures of the molecules HOCN, HSCN, HNCO, HNCS and the anions OCN -, SCN - have been investigated ab initio at the RHF/6-31G(d) RHF/6-31G(d,p), MP2/6-31G(d)//RHF/6-31G(d) and MP2/6-31G(d,p)//RHF/6-31G(d,p) theory levels. The thermodynamic stability of the HNCO and HNCS molecules was shown to be higher than that of the HOCH and HSCN molecules, respectively. The following series of the alteration of the protolytes strength HSCN > HOCH HNCS > HNCO, HOCN > HNCO, HSCN > HNCS was substantiated. The computations taking into account the electronic correlation (MP2/6-31G(d)//RHF/6-31G(d) and MP2/6-31G(d,p)//RHF/6-31G(d,p)) reflect the general sequence of change in the pro- ton-donor properties: HSCN > HOCN > HNCS > HNCO, coinciding with the order of descending hydrophobicity of the compounds. The comparative proton-donor ability of the above acids in aqueous solutions is determined basically from the electronic structure and size of their molecules and anions OCN -, SCN -, but not on medium effects.

Estimation of proton donor ability of surface hydroxy groups in terms of proton affinity

1981 ◽  
Vol 16 (2-3) ◽  
pp. 131-135 ◽  
Author(s):  
E. A. Paukshtis ◽  
E. N. Yurchenko
Keyword(s):  
Proton Affinity ◽  
Proton Donor ◽  
Donor Ability ◽  
Hydroxy Groups
Sign in / Sign up

Export Citation Format

Share Document