SUPPORTING INFORMATION: Correlation between thermophoretic behavior and hydrophilicity for various alcohols Monika Bjelˇci´c,Doreen Niether and Simone Wiegand May 23, 2019 Contents S1 Properties of the investigated alcohols S2 S2 Refractive index contrast factors S2 S2.1 Refractive index contrast measurements . S2 S2.2 Refractive index contrasts with concentration . S5 S3 Density and viscosity data used for the analysis S10 S3.1 Density and viscosity for 1-propanol . S10 S3.2 Density and viscosity for butane-1,4-diol . S12 S3.3 Density and viscosity for propane-1,3-diol . S14 S3.4 Density and viscosity for ethane-1,2-diol . S16 S3.5 Density and viscosity for arabitol . S18 S3.6 Density and viscosity for mannitol . S20 S4 Thermal diffusion coefficient S22 S5 Partition coefficient S23 S6 Diffusion coefficient calculations S24 S1 S1 Properties of the investigated alcohols In this short paragraph we summarize some properties of the investigated alcohols, which might be helpful to compare the results as the sequence of the diffusion coefficients in relation to the molar mass as displayed in Fig. 3 in the main manuscript. Table S1: List of investigated alcohols with a partial chemical formula, molec- 3 ular mass in g/mol, calculated van der Waals volume VvdW in cm /mol [2] and logP . alcohol partial chemical formula Mw VvdW log P methanol CH3OH 32.04 22 −0:57 ethanol CH3CH2OH 46.07 32 −0:22 1-propanol CH3CH2CH2OH 60.10 42 0:25 ethylene glycol OHCH2CH2OH 62.07 37 −1:31 propylene glycol CH3COH2CH2OH 76.09 47 −0:9 propane-1,3-diol OH[CH2]3OH 76.10 47 −1:26 butane-1,4-diol OH[CH2]4OH 90.12 57 −0:81 glycerol OHCH2COH2CH2OH 92.02 51 −1:98 arabitol OHCH2[OHCH]3CH2OH 152.15 81 −3:33 mannitol OHCH2[OHCH]4CH2OH 182.17 96 −4 S2 Refractive index contrast factors S2.1 Refractive index contrast measurements The refractive index increments with temperature (@n/@T)p,c were measured interferometrically [3]. Measurements were performed for all concentrations measured by IR-TDFRS, around temperatures across the temperature range between 10-60oC for all with maximum heating rate of 2 mK/sec. The re- fractive index increments with temperature (@n/@T)p;c for 1-propanol and ethane-1,2-diol are listed in the table S2 and S3, respectively. Additionally, you find the data for propane-1,2-diol, propane-1,3-diol and butane-1,4-diol in water Table S4 and for aqueous solutions of glycerol, arabitol and mannitol in Table S5. S2 Table S2: Refractive index increments with temperature (@n=@T )p;c of 1- propanol in water. Concentration c in the mass fraction of 1-propanol. −4 −1 (@n=@T )p;c=10 K c/wt 0.2045 0.258 0.464 0.653 0.868 T /◦C 10 −1:92 −2:29 −2:97 −3:43 −3:89 20 −2:11 −2:41 −3:06 −3:52 −3:97 30 −2:28 −2:52 −3:15 −3:62 −4:06 40 −2:44 −2:64 −3:25 −3:72 −4:17 50 −2:58 −2:75 −3:36 −3:83 −4:28 60 −2:72 −2:88 −3:48 −3:95 −4:41 70 −2:85 −3:00 −3:61 −4:07 −4:55 Table S3: Refractive index increments with temperature (@n=@T )p;c of ethane-1,2-diol in water. Concentration c in the mass fraction of ethane- 1,2-diol. −4 −1 (@n=@T )p;c=10 K c/wt 0.272 0.5 0.703 T /◦C 10 −1:32 −2:01 −2:97 20 −1:53 −2:12 −3:06 30 −1:73 −2:23 −3:15 40 −1:91 −2:34 −3:25 50 −2:08 −2:45 −3:36 60 −2:24 −2:56 −3:48 70 −2:39 −2:67 −3:61 S3 Table S4: Refractive index increments with temperature (@n=@T )p;c of propane-1,2-diol, propane-1,3-diol and butane-1,4-diol in water. Concentra- tion c in the mass fraction of propane-1,2-diol, propane-1,3-diol and butane- 1,4-diol. −4 −1 (@n=@T )p;c=10 K propane-1,3-diol propane-1,2-diol butane-1,4-diol c/wt% 0.12 0.257 0:114 0:263 T /◦C 10 −0:71 −1:11 -0.78 -1.22 20 −1:04 −1:36 -1.11 -1.48 30 −1:33 −1:59 -1.40 -1.72 40 −1:59 −1:81 -1.66 -1.94 50 −1:81 −2:01 -1.88 -2.14 60 −2:00 −2:18 -2.06 -2.32 Table S5: Refractive index increments with temperature (@n=@T )p;c of glyc- erol, arabitol and mannitol in water. Concentration c in the mass fraction of glycerol, arabitol and mannitol. −4 −1 (@n=@T )p;c=10 K glycerol arabitol mannitol c/wt% 0:12 0:231 0:255 0:297 T /◦C 10 -0.89 -1.10 -1.15 -0.81 20 -1.18 -1.34 -1.39 -1.11 30 -1.44 -1.56 -1.60 -1.38 40 -1.66 -1.76 -1.79 -1.61 50 -1.85 -1.94 -1.96 -1.82 60 -2.02 -2.10 -2.11 -1.98 S4 S2.2 Refractive index contrasts with concentration Refractive indices were measured for seven concentrations at the same tem- perature range as IR-TDFRS for each system. The refractive index incre- ments with the mass concentration (@n/@c)p,T were measured by an Anton Paar RXA 156 refractometer, with an accuracy of 0.00002 nD and tempera- ture control of ∆T = ±0.03K. This refractometer uses a wavelength of 589.3 nm (sodium line), which is shorter than the wavelength of the read-out beam in our IR-TDFRS setup (HeNe-laser, 632.8 nm). This causes a small system- atic error in the refractive index increment in the order of 0.5-1% [4, 5]. The concentration and temperature dependence of n was fitted with a function to determine (@n/@c)p,T. Table 5 to 12 shows the measured values over the investigated temperature and concentration range. Table S6: Refractive index n of 1-propanol in water. Concentration c in the mass fraction of 1-propanol. n c/wt 0.258 0.451 0.653 0.868 1 T /◦C 10 1.3574 1.36937 1.37921 1.38711 1.38931 20 1.35517 1.36636 1.37572 1.38315 1.38513 30 1.35267 1.36315 1.37205 1.37908 1.38099 40 1.3496 1.35986 1.36832 1.37488 1.37675 50 1.34645 1.35645 1.36447 1.37065 1.37245 60 1.3427 1.35275 1.3605 1.36644 1.36806 70 1.3394 1.3488 1.3566 1.36185 1.3635 Table S7: Refractive index n of butane-1,4-diol in water. Concentration c in the mass fraction of butane-1,4-diol. n c/wt 0:12 0:34 0:512 0:696 0:862 1 T /◦C 10 1.34505 1.37305 1.39627 1.41839 1.43792 1.44891 20 1.34414 1.37138 1.39399 1.41577 1.43385 1.44606 30 1.34289 1.36951 1.39166 1.4132 1.43109 1.44315 40 1.34136 1.36753 1.3891 1.41053 1.42804 1.44019 50 1.33962 1.36521 1.38651 1.40754 1.42536 1.43731 60 1.33782 1.36357 1.38437 1.40501 1.42258 1.43433 70 1.33577 1.36111 1.38161 1.40184 1.42012 1.43108 S5 Table S8: Refractive index n of ethane-1,2-diol in water. Concentration c in the mass fraction of ethane-1,2-diol. n c/wt 0:06 0:272 0:496 0:681 0:898 1 T /◦C 10 1.33954 1.36103 1.38491 1.4039 1.4242 1.43451 20 1.33864 1.35956 1.38287 1.40147 1.42185 1.4317 30 1.33739 1.35786 1.38059 1.39892 1.4188 1.42888 40 1.33591 1.35596 1.37826 1.39625 1.42592 1.42592 50 1.33416 1.35391 1.37577 1.39355 1.41315 1.42272 60 1.33372 1.35186 1.37337 1.39091 1.40984 1.41908 70 1.33019 1.35029 1.37215 1.38803 1.40682 1.41552 Table S9: Refractive index n of propane-1,3-diol in water. Concentration c in the mass fraction of propane-1,3-diol. n c/wt 0:105 0:305 0:504 0:708 0:863 1 T /◦C 10 1.34434 1.36681 1.3899 1.41061 1.42902 1.44219 20 1.34346 1.36541 1.38796 1.40841 1.42659 1.43841 30 1.34225 1.3638 1.38579 1.40588 1.42378 1.43647 40 1.34065 1.36188 1.38343 1.40338 1.42093 1.43207 50 1.33885 1.35978 1.38098 1.40066 1.41824 1.43045 60 1.33836 1.35759 1.37857 1.39783 1.41526 1.42723 Table S10: Refractive index n of propane-1,2-diol in water. Concentration c in the mass fraction of propane-1,2-diol. n c/wt 0:118 0:316 0:517 0:707 0:894 1 T /◦C 10 1.34676 1.37063 1.39363 1.41279 1.42877 1.4364 20 1.34573 1.36879 1.39112 1.40999 1.42549 1.43306 30 1.34432 1.36678 1.38844 1.40683 1.42221 / 40 1.34283 1.36475 1.386 1.40417 1.41887 1.42595 50 1.34115 1.3626 1.38341 1.40095 1.41551 1.42229 60 1.33903 1.35988 1.3804 1.39812 1.41225 1.41857 S6 Table S11: Refractive index n of glycerol in water.