Naphthalimide trifluoroacetyl acetonate: a hydrazine-selective chemodosimetric sensor
作者:Min Hee Lee、Byungkwon Yoon、Jong Seung Kim、Jonathan L. Sessler
DOI:10.1039/c3sc51813b
日期:——
The trifluoroacetyl acetonate naphthalimide derivative 1 has been synthesized in good yield. In acetonitrile solution, compound 1 reacts selectively with hydrazine (NH2NH2) to give a five-membered ring. This leads to OFF–ON fluorescence with a maximum intensity at 501 nm as well as easily discernible color changes. Based on a readily discernible and reproducible 3.9% change in overall fluorescence intensity, the limit of detection for 1 is 3.2 ppb (0.1 μM), which is below the accepted limit for hydrazine set by the U.S. Environmental Protection Agency (EPA). Compound 1 is selective for hydrazine over other amines, including NH4OH, NH2OH, ethylenediamine, methylamine, n-butylamine, piperazine, dimethylamine, triethylamine, pyridine, and is not perturbed by environmentally abundant metal ions. When supported on glass-backed silica gel TLC plates, compound 1 acts as a fluorimetric and colorimetric probe for hydrazine vapor at a partial pressure of 9.0 mm Hg, with selectivity over other potentially interfering volatile analytes, including ammonia, methylamine, n-butylamine, formaldehyde, acetaldehyde, H2O2, HCl, and CO2 being observed. Probe 1 can also be used for the detection of hydrazine in HeLa cells and does so without appreciable interference from other biologically abundant amines and metal ions.
三氟乙酰乙酸酯萘二胺衍生物1已成功合成并获得良好产率。在乙腈溶液中,化合物1与肼(NH2NH2)选择性反应,形成五元环。这导致了关闭-开启的荧光变化,最大强度出现在501 nm,并且颜色变化显而易见。基于整体荧光强度变化的3.9%,化合物1的检测限为3.2 ppb(0.1 μM),低于美国环境保护局(EPA)设定的肼的接受限值。化合物1对肼具有选择性,相对于其他胺类,包括NH4OH、NH2OH、乙二胺、甲胺、正丁胺、哌嗪、二甲胺、三乙胺、吡啶,并且不受环境中丰富的金属离子的干扰。当支持在玻璃背衬的硅胶薄层色谱板上时,化合物1能够作为肼蒸气的荧光和比色探针,在9.0 mm Hg的分压下展现出对其他潜在干扰挥发性分析物(包括氨、甲胺、正丁胺、甲醛、乙醛、H2O2、HCl和CO2)的选择性。探针1还可以用于HeLa细胞中肼的检测,且在此过程中与其他生物 abundant的胺和金属离子的干扰不显著。