Overview
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Key numbers
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- tively stable Cr(III) form 7,8. It was proposed that the most Here, we examine an outcome from the interaction between
- multilayer with a diameter ranging from 30 nm to micrometric temperatures in the range of 4–40 °C for 1,2-dimyristoyl-sn-
- DMPC the result was 24.9(4) °C. Obtained Tc value for all lipo- cover as broad range of concentrations as possible.
- are listed in Table S1.† Our data suggest that we obtained reli- compared to Cr(VI)-treated samples are presented in Fig. 1A and
- treated with Cr(VI) (see Fig. 1A and B). The peak in the range of
- Table 1 LCF results. K2Cr2O7 and DMPC/DOPE 1 : 1 samples were used as references for Cr(VI) and Cr(III) respectively. The R value was fit
- spectra from our other samples (DMPC, DMPC : DOPE + Cr the LCF (Table 1) procedure, and using a calibration curve,
- nation Fitting (LCF) procedure. Results are presented in Table 1
- growing DOPE concentration, and for 17% of DOPE, the (Cr(VI))/
- black line), DMPC + Cr liposomes (red line) and DMPC/DOPE 5 : 1 + Cr the 2q range of 28–29.5° in XRD spectra for DMPC + Cr and
- $10%. Cr(VI), e.g., Cr2O72− or HCrO42−, have high redox potential
- results above suggested that for the one-electron reduction of were diluted in the 99% deuterium dioxide (D2O, Sigma-Aldrich
- trum from 5974.8 eV to 6064.8 eV. The broader range was Cr(VI) can stop the process by changing HII to the lamellar phase
Methods (brief)
- EPR approach, we revealed that some Cr content (Cr(III) and Cr(VI)) was still present in the samples even
- Fig. S1.1-5a,† while in Fig. S1.1-5b,† the Tc were determined. For a parameter and systematically increased in the samples to
- are listed in Table S1.† Our data suggest that we obtained reli- compared to Cr(VI)-treated samples are presented in Fig. 1A and
- selected liposomal samples, enthalpies of phase transitions Fig. S2.† All XRD patterns have sets of reections that have
- were measured with differential scanning calorimetry (DSC). a well-dened shape. Therefore, all liposomal samples maintain
- membranes structure (Fig. S1.6†). The whole characterization blurred because even dried samples preserved the internal
- studied samples. At the temperature below Tc, the diffraction a different and simpler pattern. The DOPE phospholipid and its
- As a nal step, samples were concentrated by water evapo- mixtures. The peak around 1.7–1.94° indicated a subgel space
- obtained from a biological-like sample is difficult, we have sponding to the total bilayer thickness. Moreover, this averaged
- Fig. 1 X-ray powder diffractograms of two of liposomal sample groups that were both treated and not treated with Cr(VI): (A) – small DOPE
- critical challenge was maintaining clean samples and not
- as pure as possible samples. Control samples were prepared in
- lipid membrane. The XRD patterns of liposomal samples
- treated with a Cr(VI) in Fig. 1A and B have less internal order and all samples are presented in Fig. 2A, while a pre-edge region is
- between samples measured in RT and at 10 K, except the lower
- Moreover, aer exposition to Cr(VI), all lipid samples exhibit
- DMPC : DOPE 1 : 1 + Cr sample was 5999.6 eV. A signicant
- Table 1 LCF results. K2Cr2O7 and DMPC/DOPE 1 : 1 samples were used as references for Cr(VI) and Cr(III) respectively. The R value was fit
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