Hydrophobic study of increasing alkyl chain length of platinum surfactant complexes: synthesis, characterization, micellization, thermodynamics, thermogravimetrics and surface morphology

RSC Advances ◽  
2016 ◽  
Vol 6 (93) ◽  
pp. 90607-90623 ◽  
Author(s):  
Nitin Kumar Sharma ◽  
Man Singh ◽  
Ajaya Bhattarai
Keyword(s):  
Surface Morphology ◽  
Physicochemical Properties ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length

This paper contains details on the synthesis, characterization, physicochemical properties and surface morphology of five supramolecular metallosurfactants (SMMSs).

scholarly journals Effect of Alkyl Chain Length in Anions on the Physicochemical Properties of Cellulose-Dissolving Protic Ionic Liquids

2019 ◽  
Vol 72 (2) ◽  
pp. 55 ◽  
Author(s):  
Hideki Hanabusa ◽  
Yuko Takeoka ◽  
Masahiro Rikukawa ◽  
Masahiro Yoshizawa-Fujita
Keyword(s):  
Physicochemical Properties ◽  
Chain Length ◽  
Alkyl Chain ◽  
Ionic Conductivities ◽  
Alkyl Chain Length ◽  
Cellulose Dissolution ◽  
Protic Ionic Liquids ◽  
Scanning Calorimetry ◽  
Protic Ionic Liquid ◽  
Chemical Structures

A protic ionic liquid (PIL) composed of 1,8-diazabicyclo[5.4.0]-undec-7-ene (DBU) and acetic acid can dissolve cellulose under mild conditions and catalyse its transesterification. To investigate the relationship between physicochemical properties and chemical structures, PILs composed of DBU and carboxylic acids with varying alkyl chain lengths were prepared as cellulose-dissolving solvents. The thermal behaviours of the PILs were analysed by thermogravimetry and differential scanning calorimetry, and their viscosities, ionic conductivities, and cellulose-dissolution abilities were determined. The effect of the alkyl chain length in the carboxylate ion on the physicochemical properties of the PILs was investigated. With increasing chain length, the thermal stability and ionic conductivity increased, whereas the melting point (Tm), glass-transition temperature (Tg), cellulose solubility, and viscosity decreased. The cellulose solubility increased as the difference between the pKa values of the DBU and carboxylic acid (ΔpKa) increased. In addition, the cellulose solubility increased with the increasing density of the PIL. It was revealed that PILs with a high ΔpKa value and a carboxylate ion with a short alkyl chain are suitable for cellulose dissolution.

Effect of alkyl chain length of the ammonium groups in SEPC-CIL on the performance of polymer solar cells

2017 ◽  
Vol 5 (29) ◽  
pp. 15294-15301 ◽  
Author(s):  
Youchun Chen ◽  
Simin Zhang ◽  
Qiming Peng ◽  
Lixin Wu ◽  
Fenghong Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Surface Morphology ◽  
Chain Length ◽  
Alkyl Chain ◽  
Polymer Solar Cells ◽  
Alkyl Chain Length ◽  
Cathode Interlayer

The alkyl chain length of {[CH3(CH2)n−1]4N}4[SiW12O40] as a cathode interlayer can significantly affect the performance of polymer solar cells due to the different surface morphology of the films.

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