The effect of N-alkyl chain length on the photophysical properties of indene-1,3-dionemethylene-1,4-dihydropyridine derivatives

2016 ◽  
Vol 4 (25) ◽  
pp. 5970-5980 ◽  
Author(s):  
Yanze Liu ◽  
Yunxiang Lei ◽  
Miaochang Liu ◽  
Fei Li ◽  
Hongping Xiao ◽  
...  
Keyword(s):  
Chain Length ◽  
Alkyl Chain ◽  
Photophysical Properties ◽  
Alkyl Chain Length ◽  
Alkyl Length ◽  
Dihydropyridine Derivatives

AIEE-active indene-1,3-dionemethylene-1,4-dihydropyridine derivatives exhibit reversible alkyl-length-dependent mechanofluorochromic properties.

scholarly journals Dissolution Behavior of Cellulose in IL + DMSO Solvent: Effect of Alkyl Length in Imidazolium Cation on Cellulose Dissolution

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Airong Xu ◽  
Lili Cao ◽  
Bingjun Wang ◽  
Junying Ma
Keyword(s):  
Solvent Effect ◽  
Dimethyl Sulfoxide ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Dissolution Behavior ◽  
Cellulose Dissolution ◽  
Imidazolium Cation ◽  
Cellulose Solvents ◽  
Alkyl Length

Four cellulose solvents including [C2mim][CH3COO] + DMSO, [C4mim][CH3COO] + DMSO, [C6mim][CH3COO] + DMSO, and [C8mim][CH3COO] + DMSO were prepared by adding dimethyl sulfoxide DMSO in 1-ethyl-3-methylimidazolium acetate [C2mim][CH3COO], 1-butyl-3-methylimidazolium acetate [C4mim][CH3COO], 1-hexyl-3-methylimidazolium acetate [C6mim][CH3COO], and 1-octyl-3-methylimidazolium acetate [C8mim][CH3COO], respectively. The solubilities of cellulose in these solvents were determined at 25°C. The effect of the alkyl chain length in imidazolium cation on cellulose solubility was investigated. With increasing alkyl chain length in imidazolium cation, the solubility of cellulose increases, but further increase in alkyl chain length results in decreases in cellulose.

scholarly journals Influence of surfactant alkyl length in functionalizing sol–gel derived microporous cobalt oxide silica

RSC Advances ◽  
2014 ◽  
Vol 4 (76) ◽  
pp. 40181-40187 ◽  
Author(s):  
Gianni Olguin ◽  
Christelle Yacou ◽  
Simon Smart ◽  
João C. Diniz da Costa
Keyword(s):  
Cobalt Oxide ◽  
Chain Length ◽  
Oxidation State ◽  
Cationic Surfactants ◽  
Alkyl Chain ◽  
Sol Gel ◽  
Alkyl Chain Length ◽  
Pore Morphology ◽  
Silica Materials ◽  
Alkyl Length

The size or alkyl chain length of cationic surfactants can be used to tailor both the pore morphology and the functionality or oxidation state of cobalt in silica materials.

scholarly journals Deep in blue with green chemistry: influence of solvent and chain length on the behaviour of N- and N,N′- alkyl indigo derivatives

2021 ◽  
Vol 12 (1) ◽  
pp. 303-313
Author(s):  
Daniela Pinheiro ◽  
Marta Pineiro ◽  
Adelino M. Galvão ◽  
J. Sérgio Seixas de Melo
Keyword(s):  
Green Chemistry ◽  
Chain Length ◽  
Alkyl Chain ◽  
Photophysical Properties ◽  
Alkyl Chain Length ◽  
Influence Of Solvent

Using green chemistry procedures the synthesis of N- and N,N′-alkyl indigo derivatives was undertaken and the effect of the alkyl chain length on the spectral (including color) and photophysical properties of the compounds explored.

scholarly journals Silver Nanoparticles Stabilized with Phosphorus-Containing Heterocyclic Surfactants: Synthesis, Physico-Chemical Properties, and Biological Activity Determination

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1883
Author(s):  
Martin Pisárčik ◽  
Miloš Lukáč ◽  
Josef Jampílek ◽  
František Bilka ◽  
Andrea Bilková ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Biological Activity ◽  
Zeta Potential ◽  
Chain Length ◽  
Alkyl Chain ◽  
Chemical Properties ◽  
Alkyl Chain Length ◽  
Microbial Pathogens ◽  
Physico Chemical ◽  
Phosphorus Containing

Phosphorus-containing heterocyclic cationic surfactants alkyldimethylphenylphospholium bromides with the alkyl chain length 14 to 18 carbon atoms were used for the stabilization of silver nanodispersions. Zeta potential of silver nanodispersions ranges from +35 to +70 mV, which indicates the formation of stable silver nanoparticles (AgNPs). Long-chain heptadecyl and octadecyl homologs of the surfactants series provided the most intensive stabilizing effect to AgNPs, resulting in high positive zeta potential values and smaller diameter of AgNPs in the range 50–60 nm. A comparison with non-heterocyclic alkyltrimethylphosphonium surfactants of the same alkyl chain length showed better stability and more positive zeta potential values for silver nanodispersions stabilized with heterocyclic phospholium surfactants. Investigations of biological activity of phospholium-capped AgNPs are represented by the studies of antimicrobial activity and cytotoxicity. While cytotoxicity results revealed an increased level of HepG2 cell growth inhibition as compared with the cytotoxicity level of silver-free surfactant solutions, no enhanced antimicrobial action of phospholium-capped AgNPs against microbial pathogens was observed. The comparison of cytotoxicity of AgNPs stabilized with various non-heterocyclic ammonium and phosphonium surfactants shows that AgNPs capped with heterocyclic alkyldimethylphenylphospholium and non-heterocyclic triphenyl-substituted phosphonium surfactants have the highest cytotoxicity among silver nanodispersions stabilized by the series of ammonium and phosphonium surfactants.

scholarly journals Physico-chemical and gel properties of heat-induced pasteurized liquid egg white gel: effect of alkyl chain length of alcohol

2021 ◽  
Vol 24 (1) ◽  
pp. 1229-1243
Author(s):  
Danai Charoensuk ◽  
Robert G. Brannan ◽  
Wilailuk Chaiyasit ◽  
Wanlop Chanasattru
Keyword(s):  
Chain Length ◽  
Alkyl Chain ◽  
Egg White ◽  
Alkyl Chain Length ◽  
Gel Properties ◽  
Gel Effect ◽  
Physico Chemical
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