The author of 《Optical detection of fe3+ ions in aqueous solution with high selectivity and sensitivity by using sulfasalazine functionalized microgels》 were Ji, Weiming; Zhu, Zumei; Dong, Shunni; Nie, Jingjing; Du, Binyang. And the article was published in Sensors in 2019. Recommanded Product: 1,6-Dibromohexane The author mentioned the following in the article:
A highly selective and sensitive optical sensor was developed to colorimetric detect trace Fe3+ ions in aqueous solution The sensor was the sulfasalazine (SSZ) functionalized microgels (SSZ-MGs), which were fabricated via in-situ quaternization reaction. The obtained SSZ-MGs had hydrodynamic radius of about 259 ± 24 nm with uniform size distribution at 25°C. The SSZ-MG aqueous suspensions can selectively and sensitively response to Fe3+ ions in aqueous solution at 25°C and pH of 5.6, which can be quantified by UV-visible spectroscopy and also easily distinguished by the naked eye. Job’s plot indicated that the molar binding ratio of SSZ moiety in SSZ-MGs to Fe3+ was close to 1:1 with an apparent association constant of 1.72 x 104 M-1. A linear range of 0-12μM with the detection limit of 0.110μM (0.006 mg/L) was found. The obtained detection limit was much lower than the maximum allowance level of Fe3+ ions in drinking water (0.3 mg/L) regulated by the Environmental Protection Agency (EPA) of the United States. The existence of 19 other species of metal ions, namely, Ag+, Li+, Na+, K+, Ca2+, Ba2+, Cu2+, Ni2+, Mn2+, Pb2+, Zn2+, Cd2+, Co2+, Cr3+, Yb3+, La3+, Gd3+, Ce3+-, and Bi3+, did not interfere with the detection of Fe3+ ions. In the experimental materials used by the author, we found 1,6-Dibromohexane(cas: 629-03-8Recommanded Product: 1,6-Dibromohexane)
1,6-Dibromohexane(cas: 629-03-8) is generally used to introduce C6 spacer in the molecular architecture. Some of the examples are: synthesis of pyrrolo-tetrathiafulvalene molecular bridge (6PTTF6) to study redox switching behavior of single molecules; synthesis of water-soluble thermoresponsive polylactides.Recommanded Product: 1,6-Dibromohexane
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary