Carbon disulfide solution was prepared with 200 mL carbon
disulfide dissolving in 100 mL ethanol. Hydrazine hydrate
(50 mL) was added to five-necked flask and heated at 343–353 K
in fixed-temperature water bath. Carbon disulfide solution was
added into the flask slowly while the mixture was stirred. After
reaction of 2 h, the resulting product was cooled down to below
283 K and crystallized. Purification of the crystal was carried out
by the following steps: suction filtering, washing (2 times with
ethanol and 2–3 times with distilled water), suction filtering, and
vacuum drying at 408 K. Then, the white DTC–TBA crystal was
obtained.