《A “”turn-on”” fluorescent probe based on V-shaped bis-coumarin for detection of hydrazine》 was written by Jiang, Xingzong; Shangguan, Mingqin; Lu, Zhen; Yi, Sili; Zeng, Xiaoyang; Zhang, Yongle; Hou, Linxi. Electric Literature of C4H7BrO2 And the article was included in Tetrahedron in 2020. The article conveys some information:
Hydrazine (N2H4) has been classified as an environmental contaminant and human carcinogen owing to its high toxicity. Exposed to high concentration of hydrazine can cause irreversible damage to human bodies. Hence, it is significant to explore an effective anal. method to selectively recognize and detect it. In this work, an intramol. charge transfer (ICT) based probe 1 (I) was designed and synthesized by condensation of V-shaped bis-coumarin and 4-bromobutyric acid. The V-shaped bis-coumarin with π-expanded system endowed the probe 1 larger stokes shift and superior tolerance to photobleaching. This “”turn-on”” probe exhibited a high selectivity towards hydrazine over other common ions and amine-containing species with a distinct fluorescent enhancement at 555 nm. It could rapidly detect hydrazine over a wide pH range and the detection limit was as low as 4.2 ppb. The large shift of absorption spectrum enabled it to detect hydrazine in real water samples and gas-state hydrazine by “”naked-eyes””. In the experiment, the researchers used many compounds, for example, 4-Bromobutanoic acid(cas: 2623-87-2Electric Literature of C4H7BrO2)
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.).Electric Literature of C4H7BrO2
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary