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3 protocols using n methylpyrrolidone nmp

1

Synthesis of PVA-Stabilized Noble Metal Nanoparticles

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Polyvinyl alcohol (PVA, average polymerization degree = 1200) (Wako Pure Chemical,) was used as received. Methyl isothiocyanate (Tokyo Kasei Kogyo, >98.0%) was distilled prior to use. Sodium tetrachloropalladate (II) (Na2PdCl4, Tokyo Kasei Kogyo, >98.0%) and sodium tetrachloroaurate (III) dehydrate (NaAuCl4, Wako Pure Chemical, >95.0%) were commercially available and used as received. Dimethylsulfoxide (Wako Pure Chemical, >99.0%) was distilled under CaH2. N-Methylpyrrolidone (NMP, Wako Pure Chemical, >99.0%) was used as received.
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2

Purification of SWNTs for Characterization

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The SWNTs (Meijo-SO) with a ~1.4 nm diameter were purchased from Meijo Nanocarbon Co., Ltd., and purified according to a previous method45 . Acetone, deuterium oxide (D2O, 99.9%), ethanol, hydrochloric acid (12 M), hydrogen peroxide, N-methylpyrrolidone (NMP), sodium dodecylbenzenesulfonate (SDBS) and toluene were purchased from Wako Pure Chemical Industries, Ltd., and used as received. CoCp2 was purchased from Aldrich and used as received.
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3

Synthesis of Aspartame Precursor

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l-Aspartyl-l-phenylalanine methyl ester was supplied by Ajinomoto Co., Inc. Triphenyl phosphite (P(OPh)3), l-phenylalanine (Phe), succinic acid, ethylene diamine and p-phenylenediamine were purchased from Tokyo Chemical Industry Co., Ltd. 5% Palladium on activated carbon (Pd/C) and N-methylpyrrolidone (NMP) were purchased from FUJIFILM Wako Pure Chemical Corporation. Dimethyl sulfoxide (DMSO), sulfuric acid, nitric acid, pyridine, ethanol, tetrahydrofuran, ethyl acetate, acetone and toluene were purchased from Kanto Chemical Co., Inc. All the chemicals were directly used as purchased.
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