Abstract:

The self-assembly and gelating characteristics of a set of N-alkyl-(R)-12-hydroxyoctadecylammonium salts (nHOA-X, where n = 0−6, 18 is the length of the alkyl chain on nitrogen, X = Cl, n = 3, and X = Br, NO3, and BF4) were investigated. N-alkyl-(R)-12-hydroxyoctadecylammonium salts were manipulated to various phases (neat solid, hydrogel, and toluene gel) by cooling at different rates. X-ray powder diffraction (XRD) was used along with polarized optical microscopy and atomic force microscopy to make observations. This dataset reports the angle and XRD intensity of 3-HOA-Br as a neat solid, hydrogel, and toluene gel after exposure to 22 degrees C; as well as 3-HOA-NO3 and 3-HOA-BF4 as neat solids after exposure to 22 degrees C. Conductivity measurements of 3-HOA-Br 3-HOA-Cl, 3-HOA-NO3, and 3-HOA-BF4 in water at various temperatures are included. The melting temperature of hydrogels was also measured after exposure to various chlorine concentrations. Dataset supporting the publication Influence of Anions and Alkyl Chain Lengths of N-Alkyl-n-(R)-12-Hydroxyoctadecyl Ammonium Salts on Their Hydrogels and Organogels. http://pubs.acs.org/doi/pdfplus/10.1021/la400748q

Suggested Citation:

Mallia, V. Ajay, Hyae-In Seo, and Richard G. Weiss. 2016. Dataset for: Influence of Anions and Alkyl Chain Lengths of N-Alkyl-n-(R)-12-Hydroxyoctadecyl Ammonium Salts on Their Hydrogels and Organogels. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N71N7Z49

Publications:

Mallia, V. A., Seo, H.-I., & Weiss, R. G. (2013). Influence of Anions and Alkyl Chain Lengths of N -Alkyl- n -( R )-12-Hydroxyoctadecyl Ammonium Salts on Their Hydrogels and Organogels . Langmuir, 29(21), 6476–6484. doi:10.1021/la400748q

Purpose:

To investigate how alkylhydroxyoctadecyl ammonium salts form gels and influence the behavior of solids.

Data Parameters and Units:

data.xlsx - Figure 3: XRD intensity (a.u.), 2 theta (degrees), of 3-HOA-Br (neat solid, hydrogel and toluene gel) at 22 degrees Celsius; Figure 4A: XRD intensity (a.u.), 2 theta (degrees), neat solid 3-HOA-NO3 and its 5.0 wt % hydrogel at 22 degrees Celsius; Figure 4B: XRD intensity (a.u.), 2 theta (degrees), neat solid 3-HOA-BF4 and its 5.0 wt % hydrogel at 22 degrees Celsius; Figure 5A: conductance (micromho), concentration of 3-HOA-Cl (wt%); Figure 5B: conductance (micromho), concentration of 3-HOA-Br (wt %); Figure 5C: conductance (micromho), concentration of 3-HOA-NO3 (wt %); Figure 5D: conductance (micromho), concentration of 3-HOA-BF4 (wt %); Figure 6: chloride concentration (M), gelation temperature (degrees Celsius), salt (KCl,NaCl, CaCl2, FeCl3); Figure S5: XRD intensity (a.u.), 2 theta (degrees), neat 0-HOA-Cl at 22 degrees Celsius; Figure S9: XRD intensity (a.u.), 2 theta (degrees), neat 3-HOA-Cl at 22 degrees Celsius; Figure S15 XRD intensity (a.u.), 2 theta (degrees), temperature (22 degrees Celsius or 130 degrees Celsius); Figure S16: XRD intensity (a.u.), 2 theta (degrees) temperature (22 degrees Celsius or 130 degrees Celsius), 18-HOA-Cl; Figure S17: IR spectrum wavenumber (cm-1), transmittance (%) , neat 3-HOA-Cl; Figure S19: XRD intensity (a.u.), 2 theta (degrees), temperature (22 degrees Celsius or 115 degrees Celsius), neat 3-HOA-Br; Figure S20: XRD intensity (a.u.), 2 theta (degrees) neat 3-HOA-I at 22 degrees Celsius; Figure S21: XRD intensity (a.u.), 2 theta (degrees), 3-HOA-NO3 at 22 degrees Celsius; Figure S23: rheology measurements - strain (%), G' (Pa), G" (Pa), Frequency (rad/s), temperature (degrees Celsius); Figure S24: rheology measurements - strain (%), G' (Pa), G" (Pa), Frequency (rad/s), temperature (degrees Celsius); Figure S25: rheology measurements - strain (%), G' (Pa), G" (Pa), Frequency (rad/s), temperature (degrees Celsius). image1.png: Polarizing optical micrograph, 23 degrees Celsius, 5 wt% 3-HOA-Br in water prepared by the fast-cooling protocols.image2.png: Polarizing optical micrograph, 23 degrees Celsius,5 wt% 3-HOA-Br in water prepared by the slow-cooling protocols. image3.png: Polarizing optical micrograph, 23 degrees C, 5 wt% 3-HOA-Br in toluene prepared by the fast-cooling protocol. image4.png: Polarizing optical micrograph, 23 degrees C,5 wt% 3-HOA-Br in toluene prepared by the slow-cooling protocols. image5.png: Atomic force micrograph (AFM), 23 degrees C, 2 wt% 3-HOA-Cl prepared by the fast-cooling protocol. image6.png: Atomic force micrograph (AFM), 23 degrees C, 2 wt% 3-HOA-Br prepared by the fast-cooling protocol.

Methods:

1. critical gelator concentrations (CGCs) were determined at 24 °C by the falling drop method 2. gel samples for examining polarizing optical micrographs (POMs) (a Photometrics CCD camera interfaced to a computer) 3. heat capacity and phase transitions measured by Differential scanning calorimetry (DSC)(DSC Q200 calorimeter) 4. topography and thickness of the thin film samples were characterized by atomic force microscopy (AFM) (Bruker BioScope Catalyst with peak force tapping using a ScanAsyst-Air probe) 5. rheological measurements with a rheometer using a Peltier temperature controller and parallel plates (Anton Paar Physica MCR 301) 6. conductivities were measured with a conductivity meter (Yellow Spring Instrument Co., model 31) 7. crystal structure of the samples was determined with X-ray diffraction (XRD) (Rigaku R-AXIS image plate system) 8. light absorption of the sample at each wavelength measured with Fourier transform infrared spectroscopy (FT-IR)(Varian 3100 FT-IR spectrometer with a PIKE MIRacle ATR sampling accessory) 9. thermal gravimetric analyses (TGA) (Thermal Analyst 3100 controller)

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