Diethylene glycol

In most parts of this manuscript, single-walled CNTs (ZEONANO^® SG101, commercially available CNTs fabricated by the supergrowth procedure [19 (link)], produced by Zeon corporation, Tokyo, Japan) were used as a loaded material for column applications. For comparison, oxidized supergrowth SWCNT (fabricated by heating to 500 °C with a ramp rate at 1 °C/min under an air flow of 2 L/min) and MWCNT Knanos-400T (Kumho Petrochemical Co., Ltd., Seoul, Republic of Korea) were also used. Amine-functionalized silica beads CHEMCOBOND 3.5NH2 were purchased from Chemco Plus Scientific Co., Ltd., Osaka, Japan. N-methylpyrrolidone (NMP), methanol, toluene, p-xylene (p-Xy), 1,2,4-trimethylbenzene (1,2,4-TMB), p-chlorotoluene (p-CT), o-chlorotoluene (o-CT), p-bromotoluene (p-BT), N,N-dimethylacetamide, methyl ethyl ketone, acetophenone, chloroform, diethylene glycol, hexane, phenyl benzoate, naphthalene, 1-methylnaphthalene, and 2-methylnaphthalene were purchased from FUJIFILM Wako Pure Chemical, Osaka, Japan. All organic reagents were used without further purification. A pyrene-functionalized silica column (COSMOSIL 5PYE: pyrenylethyl groups are bonded to the surface) was purchased from Nakalai Tesque, Kyoto, Japan.