Computed Properties of C4H7BrO2In 2019 ,《A new quinoline-derived highly-sensitive fluorescent probe for the detection of hydrazine with excellent large-emission-shift ratiometric response》 appeared in Talanta. The author of the article were Wu, Qingqing; Zheng, Jianlu; Zhang, Wencui; Wang, Jianbo; Liang, Wenlang; Stadler, Florian J.. The article conveys some information:
Hydrazine is an important industrial material yet highly toxic and extremely harmful to people’s health when over-exposed in the environment, thus monitoring hydrazine is of great significance. A novel highly fluorescent fluorophore BQ-OH, based on hydroxyl- and benzo[d]oxazole-substituted quinoline structure, was synthesized and esterified with 4-bromobutyric acid to afford a fluorescent probe BQABr for the selective detection of hydrazine. The probe follows SN2(nucleophilic substitution)-cyclization sensing mechanism with remarkable response, excellent sensitivity and selectivity. Spectra experiments in aqueous solutions demonstrated that BQABr exhibited an excellent ratiometric fluorescence response toward hydrazine with 2 well separated emission bands before/after sensing reaction. Emission peak shifted over 130 nm from 387 nm to 521 nm, and unexpectedly outstanding ratio signal enhancement over 3000-fold was achieved. Due to the large spectra response, a very low detection limit of 5.8 nM (0.19 ppb) was obtained. Selectivity experiment was performed, showing BQABr had nearly no spectra response to other possible disturbing analytes. The probe-coated test papers were fabricated and successfully applied to detect gaseous hydrazine. Also, potential application for the detection of hydrazine in both environmental samples and biol. samples (living cells) was demonstrated.4-Bromobutanoic acid(cas: 2623-87-2Computed Properties of C4H7BrO2) was used in this study.
4-Bromobutanoic acid(cas: 2623-87-2) belongs to carboxylic acids. The chief chemical characteristic of the carboxylic acids is their acidity. They are generally more acidic than other organic compounds containing hydroxyl groups but are generally weaker than the familiar mineral acids (e.g., hydrochloric acid, HCl, sulfuric acid, H2SO4, etc.).Computed Properties of C4H7BrO2
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary