Hybrid surfactants decorated with copper ions: aggregation behavior, antimicrobial activity and anti-proliferative effect

2016 ◽  
Vol 18 (34) ◽  
pp. 23961-23970 ◽  
Author(s):  
Gurpreet Kaur ◽  
Sandeep Kumar ◽  
Neeraj Dilbaghi ◽  
Gaurav Bhanjana ◽  
Santosh Kumar Guru ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Biological Activity ◽  
Copper Ions ◽  
Aqueous Media ◽  
Aggregation Behavior ◽  
The Self ◽  
Proliferative Effect ◽  
Self Aggregation

In the present study, the emphasis is laid on the self aggregation behavior and biological activity of copper based inorganic–organic hybrids in aqueous media.

Molecular dynamics study of di-CF4 based reverse micelles in supercritical CO2

2016 ◽  
Vol 18 (42) ◽  
pp. 29156-29163 ◽  
Author(s):  
Bing Liu ◽  
Xinpeng Tang ◽  
Wenjing Fang ◽  
Xiaoqi Li ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Reverse Micelles ◽  
Supercritical Co2 ◽  
Aggregation Behavior ◽  
The Self ◽  
Dynamics Simulations ◽  
Self Aggregation

Molecular dynamics simulations are performed to investigate the self-aggregation behavior of di-CF4 based reverse micelles in supercritical CO2, and stable and spherical reverse micelles are formed.

Study on the Effect of an Electrolyte on the Self-Aggregation and the Geometry of the Dye Aggregates of Methylene Blue in Aqueous Media

2016 ◽  
Vol 32 (1-2) ◽  
pp. 27
Author(s):  
Ng. Florence ◽  
H. Naorem
Keyword(s):  
Methylene Blue ◽  
Twist Angle ◽  
Aqueous Media ◽  
Least Square ◽  
The Self ◽  
Aggregation Process ◽  
Dimerization Constant ◽  
Sandwich Type ◽  
Linear Least Square ◽  
Self Aggregation

The self-aggregation of Methylene Blue (MB) dye in aqueous media has been investigated spectrophotometrically in presence of sodium chloride (NaCl) at 293.15, 303.15 and 313.15K. The dimerization constant (K<sub>D</sub>) of the MB dye in aqueous solution with or without the electrolyte has been computed using a non-linear least square regression technique. It is observed that presence of the electrolyte resulted into sharp increase in K<sub>D</sub> of MB indicating that presence of the electrolyte favours formation of dye aggregates. There is, however, a decrease in K<sub>D</sub> with increase in temperature. From the observed spectra of the dye, the twist (θ<sub>1</sub>) and the tilt (θ<sub>2</sub>) angles between the dipoles of MB molecules in the aggregates have been computed based on exciton model. Change in the monomeric fractions of the dye (α) in presence of the added electrolyte as a function of the dye concentration has also been computed. The results indicated that the dye aggregates formed is essentially of the sandwich type geometry (H-aggregates) with a slight deviation from an exact parallel stacking arrangement and reduced twist angle. The thermodynamic parameters of the aggregation process in presence of the electrolyte have been evaluated from the temperature dependence of K<sub>D</sub>. It is observed that the aggregation process is an enthalpy rather than entropy controlled one.

Probing the self-aggregation behavior and counter ion distribution of a copper surfactant complex

2014 ◽  
Vol 38 (8) ◽  
pp. 3925-3932 ◽  
Author(s):  
Ravneet Kaur ◽  
Sakshi Gupta ◽  
Surinder K. Mehta ◽  
Yosuke Imai ◽  
Takanori Takiue ◽  
...  
Keyword(s):  
Metal Ions ◽  
Aggregation Behavior ◽  
The Self ◽  
Ion Distribution ◽  
Adsorbed Film ◽  
Surfactant Complex ◽  
Adsorption Of Metal Ions ◽  
Self Aggregation ◽  
Negative Adsorption ◽  
Micelle Surface

The aggregation behavior of the metallosurfactant is pointing towards negative adsorption of metal ions at the micelle surface and surface adsorbed film.

Dendronized core-multishell nanocarriers for solubilization of guest molecules

Nanocarriers ◽  
2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Emanuel Fleige ◽  
Rahul Tyagi ◽  
Rainer Haag
Keyword(s):  
Ethylene Glycol ◽  
Nile Red ◽  
Outer Shell ◽  
Aggregation Behavior ◽  
The Self ◽  
Transport Capacity ◽  
Guest Molecules ◽  
Efficient Transport ◽  
Self Aggregation

AbstractWe have synthesized core-multishell (CMS) nanocarriers with different outer shells and the self-aggregation behavior and the transport capacity of these nanocarriers were studied with the hydrophobic guest molecules Nile red (NR) and methotrexate (MTX). The outer shell either consisted of methoxypoly(ethylene glycol) (mPEG) or polyglycerol (PG) dendrons of generation one or two. NR was solubilized by all CMS nanocarriers. The solubilization of MTX could only be achieved with mPEG-terminated CMS nanocarriers. Depending on the encapsulated guest, the CMS nanocarriers showed self-aggregation. The NR loaded CMS nanocarriers all formed bigger aggregates with a radius between 110 and 170 nm. In the case of the MTX loaded CMS nanocarriers, the MTX prevented the formation of CMS aggregates and therefore its efficient transport

One-step synthesis of silver metallosurfactant as an efficient antibacterial and anticancer material

RSC Advances ◽  
2016 ◽  
Vol 6 (62) ◽  
pp. 57084-57097 ◽  
Author(s):  
Gurpreet Kaur ◽  
Sandeep Kumar ◽  
Ravi Kant ◽  
Gaurav Bhanjana ◽  
Neeraj Dilbaghi ◽  
...  
Keyword(s):  
Dna Binding ◽  
Analytical Methods ◽  
Aggregation Behavior ◽  
The Self ◽  
Anticancer Activities ◽  
One Step ◽  
Self Aggregation

A silver based double chained metallosurfactant was synthesized and characterized with various analytical methods. Along with the self aggregation behavior, DNA binding abilities of metallomicelles and antimicrobial and anticancer activities were evaluated.

Temperature Dependence of the Self-Assembled Styrene Based Random Ionomers in Aqueous Solution

2003 ◽  
Vol 775 ◽  
Author(s):  
Sung-Hwa Oh ◽  
Ju-Myung Song ◽  
Joon-Seop Kim ◽  
Hyang-Rim Oh ◽  
Jeong-A Yu
Keyword(s):  
Partition Coefficients ◽  
Room Temperature ◽  
Aqueous Media ◽  
The Self ◽  
Spectroscopic Methods ◽  
Ion Content ◽  
Repeat Units ◽  
Notable Effect ◽  
Order Of Magnitude ◽  
Experimental Errors

AbstractSolution behaviors of poly(styrene-co-sodium methacrylate) were studied by fluorescence spectroscopic methods using pyrene as a probe. The mol% of methacrylate was in the range 3.6–9.4. Water and N,N-dimethylforamide(DMF) mixture was used as a solvent (DMF/water = 0.2 mol %). The critical micelle (or aggregation) concentrations of ionomers and the partition coefficients of pyrene were obtained the temperature range 10–80°C. At room temperature, the values of CMCs (or CACs) were in the range 4.7 ×10-6 5.3 ×10-6 g/mL and we could not find any notable effect of the content of ionic repeat units within the experimental errors. Unlike CMCs, as the ion content increased, partitioning of pyrene between the hydrophobic aggregates and an aqueous media decreased from 1.5 ×105 to 9.4 ×104. As the temperature increased from 10 to 80 °C, the values of CMCs increased less than one order of magnitude. While, the partition coefficients of pyrene decreased one order of magnitude and the effect of the ion content became negligible.

Complexes of Cu (II) with a-Ketoglutaric Acid and 1- (o-tolyl) Biguanide Synthesis, characterization and biological Activity

2019 ◽  
Vol 70 (10) ◽  
pp. 3603-3610
Author(s):  
Madalina Mihalache ◽  
Cornelia Guran ◽  
Aurelia Meghea ◽  
Vasile Bercu ◽  
Ludmila Motelica ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Biological Activity ◽  
Candida Albicans ◽  
Antifungal Activity ◽  
Copper Complexes ◽  
Substrate Adhesion ◽  
Inert Substrate

The three copper complexes having a-ketoglutaric acid (H2A) and 1- (o-tolyl) biguanide (TB) ligands have been synthesized and characterized. The proposed formulas for these complexes are: [Cu(TB)(HA)]Cl (C1), [Cu(TB)(HA)CH3COO]�H2O (C2) and [Cu(TB)(HA)](NO3) (C3) where HA represents deprotonated H2A. The complexes obtained were tested for antibacterial activity against Staphylococcus aureus ATCC 25923 and Pseudomonas aeruginosa ATCC 27853, antifungal activity on Candida albicans ATCC 10231 and antitumor activity on HeLa tumor cells. Due to the antitumor, antifungal, antimicrobial activity and inhibition of inert substrate adhesion, complexes synthesized could be used for potential therapeutic applications.

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