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Source DataV2.tab
Tabular Data - Original format: MS Excel (XLSX) - 220.2 KB - Jan 10, 2024 - 1 Download
License: CC0 Creative Commons Zero 1.0
12 Variables, 1113 Observations - UNF:6:BX7iQQTiJtXu8f878r4MAQ== This file contained tabulated source data and analysis (in .xlsx format) from the calorimetric and dielectric investigation of three sizable isomers referred to as ortho-CF3 (N-(7-[(2-trifluoromethylphenyl)ethynyl]-9,9-dibutyl-9H-fluoren-2-yl)-N,N-diphenyamine), meta-CF3 (N-(7-[(3-trifluoromethylphenyl)ethynyl]-9,9-dibutyl-9H-fluoren-2-yl)-N,N-diphenyamine), para-CF3 (N-(7-[(4-trifluoromethylphenyl)ethynyl]-9,9-dibutyl-9H-fluoren-2-yl)-N,N-diphenyamine. In particular, calorimetric data obtained during the heating of crystalline and vitrified samples (Figure 2), the frequency dependence of real and imaginary parts of complex permittivity collected at ambient pressure for various temperatures corresponding to the supercooled liquid state (Figure 3), masterplot data (Figure 4), relaxation map data i.e., characteristic relaxation times determined from collected dielectric loss spectra as a function of 1000/T (Figure 5a), so-called Angel plot data (Figure 5b), the frequency dependence of imaginary part of complex permittivity collected at ambient pressure for various temperatures corresponding to the glassy state (Figures 6a, 6b, 6c), the frequency dependence of imaginary part of complex permittivity collected at isothermal condition for selected temperature and various pressures in the thermodynamic conditions corresponding to supercooled liquid state (Figure 7 left) and pressure dependence of characteristic relaxation times determined from dielectric loss spectra collected at elevated pressure (Figure 7 right), temperature and pressure values corresponding to the glass transition (for log10τ = 2) determined from performed isothermal and isobaric (at p = 0.1 MPa) dielectric measurments (Figure 8), pressure dependence of activation volume ΔV# for meta-CF3 for isotherm collected at T = 361 K for different characteristic relaxation times (τslow and τfast associated with reorientation along the short and long molecular axis, respectively) (Figure 9), temperature dependences of quasi-static specific heat capacity Cp for the investigated isomers in the vinicity of Tg (Figure 10), the parameters determined in calorimetric and dielectric measurments used to verify the correlation between cooperativity length scale ξ and the activation volume ΔV# at Tg (Figure 11).
Ambient pressure dielectric data were generated using an Alpha Impedance analyzer spectrometer by Novocontrol with the Novocool system. Dielectric data at elevated pressure were collected using an Alpha-A impedance analyzer by Novocotrol connected with a hydrostatic pressure-generating system by Unipress, a tensometer by Nova Swiss, and a thermostat by Julabo. Calorimetric data were obtained using a Mettler-Toledo DSC1 STARe differential scanning calorimeter.
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