Racemization of (S)-Profen Thioesters by Strong Neutral Bases in Nonpolar Organic Solvents:  Implication for Ion-Pair Kinetic Basicity

2002 ◽  
Vol 67 (10) ◽  
pp. 3323-3326 ◽  
Author(s):  
Chia-Yin Chen ◽  
Yu-Shang Chang ◽  
Shun-An Lin ◽  
Hui-I Wen ◽  
Yu-Chi Cheng ◽  
...  
Keyword(s):  
Organic Solvents ◽  
Ion Pair ◽  
Nonpolar Organic

scholarly journals The Role of Solvent Environment on the Optical Behavior of Chemically Synthesized Silicon Nanoparticles

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Rawabi M. Al Mohaimeed ◽  
Anees A. Ansari ◽  
Abdullah Aldwayyan
Keyword(s):  
Organic Solvents ◽  
Silicon Nanoparticles ◽  
Wafer Surface ◽  
Absorption Properties ◽  
Nonpolar Solvents ◽  
Luminescence Efficiency ◽  
Cross Section Area ◽  
Solvent Environment ◽  
Uv Lamp ◽  
Nonpolar Organic

Silicon nanoparticles (Si-NPs) were prepared by solution-based chemical etching method. Optical characteristics of the as-prepared Si-NPs were investigated in different polar and nonpolar organic solvents. The emission and absorption properties of Si-NPs were tuned by altering the environment (solvents). The variation in absorption coefficient was observed because of the solvent interaction nature of Si-NPs. Si-NPs in polar aprotic and nonpolar solvents manifested good luminescence under UV excitation. PL intensities were observed to be depending on etched cross-section area on wafer surface. The results show a linear dependence of the refractive index (n) on wavelength (λ). The nature of solvents altered the luminescence efficiency of Si-NPs when examining under UV lamp. The emission and absorption properties of Si-NPs were tuned by altering the environment (solvents) through electrostatic interaction of various organic solvents with the Si-NPs. The band shapes of the Si-NPs show remarkable changes in passing from noncoordinating solvent (chloroform) to various coordinating solvents, which was the result of change in the environment around Si-NPs in various solutions.

The wormlike micelles formed using an ionic liquid surfactant and polar organic solvents at low temperature without additives and their lubricant properties

Soft Matter ◽  
2021 ◽  
Author(s):  
Huijiao Cao ◽  
Wenlin Xu ◽  
Xia Guo
Keyword(s):  
Ionic Liquid ◽  
Low Temperature ◽  
Organic Solvent ◽  
Organic Solvents ◽  
Wormlike Micelles ◽  
Polar Organic Solvents ◽  
Ionic Liquid Surfactant ◽  
Nonpolar Organic

Wormlike micelles (or reverse wormlike micelles) are flexible cylindrical chains that are normally formed in water (or a nonpolar organic solvent) at 25.0 °C or above; the formation of wormlike micelles at lower temperatures is rare.

Über Metalltrifluorphosphin-Komplexe. XXXVII. / On Metaltrifluorophosphine Complexes. XXXVII.

1973 ◽  
Vol 28 (1-2) ◽  
pp. 28-33 ◽  
Author(s):  
Thomas Kruck ◽  
Gerd Sylvester ◽  
Inge-Petra Kunau
Keyword(s):  
Ir Spectra ◽  
Organic Solvents ◽  
Conjugated Dienes ◽  
Thermally Stable ◽  
H Nmr ◽  
Nonpolar Organic ◽  
Nmr Signals

π-Allyltris(trifluorophosphine)cobaltcomplexes, CnH2n-1Co(PF3)3, are synthetized by the reaction of hydrido-tetrakis(trifluorophosphine)cobalt with conjugated dienes. Suitable dienes are butadiene, isoprene, chloroprene, cis-1.3-pentadiene, trans-trans-2.4-hexadiene, 2.3-dimethyl-1.3-butadiene, 2.4-dimethyl-1.3-pentadiene and 1.3-cyclohexadiene. The complexes are thermally stable up to 100°C. They can be sublimed at 25°C/10-3 Torr. They are extremely soluble in polar as well as in nonpolar organic solvents. Since the 1H-NMR-signals are only poorly resolved, it is not possible to distinguish between expected isomers. The IR-spectra are consistent with a tetrahedral arrangement of the ligands.

scholarly journals Complexes of a naphthalimide photoacid with organic bases, and their excited-state dynamics in polar aprotic organic solvents

2015 ◽  
Vol 17 (32) ◽  
pp. 20715-20724 ◽  
Author(s):  
Tatu Kumpulainen ◽  
Bert H. Bakker ◽  
Albert M. Brouwer
Keyword(s):  
Excited State ◽  
Organic Solvents ◽  
Ground State ◽  
Ion Pair ◽  
Excited State Dynamics ◽  
Organic Bases ◽  
P Addition

Addition of a base to a solution of a photoacid in aprotic organic solvents results in the formation of ground-state complexes, which upon excitation dissociate via intermediate ion pair species.

Novel polyelectrolyte gels as absorbent polymers for nonpolar organic solvents based on polymerizable ionic liquids

Polymer ◽  
2012 ◽  
Vol 53 (25) ◽  
pp. 5737-5742 ◽  
Author(s):  
Ali Pourjavadi ◽  
Malihe Doulabi ◽  
Seyed Hassan Hosseini
Keyword(s):  
Ionic Liquids ◽  
Organic Solvents ◽  
Polyelectrolyte Gels ◽  
Nonpolar Organic

Solubility of Seven Nonpolar Organic Solvents in Four Polymers Using the Piezoelectric−Quartz Sorption Method

2002 ◽  
Vol 47 (3) ◽  
pp. 518-524 ◽  
Author(s):  
Gede Wibawa ◽  
Masaki Takahashi ◽  
Yoshiyuki Sato ◽  
Shigeki Takishima ◽  
Hirokatsu Masuoka
Keyword(s):  
Organic Solvents ◽  
Piezoelectric Quartz ◽  
Sorption Method ◽  
Nonpolar Organic
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