789-76-4Relevant academic research and scientific papers
A recyclable, fluorescent, and colorimetric sensor for fluoride anion in water using a crosslinked polymer functionalized with hydroxyl quinolinium
Tang, Qian,Nie, Hong-Mei,Gong, Cheng-Bin,Liu, Hua-Dong,Xiao, Kun
, p. 3888 - 3893 (2015/02/19)
This study aimed to develop a recyclable, fluorescent, and colorimetric sensor for fluoride anion (F-) in aqueous media with fast response, good selectivity, and high sensitivity. A crosslinked polymer CpA1T5 was designed and synthesized as a sensor using (E)-1-allyl-4-((4-hydroxylphenyl)vinyl) quinolinium bromide as functional monomer, trimethylolpropane trimethacrylate as crosslinker, and azobisisobutyronitrile as initiator. When F- was introduced to the CpA1T5 suspension in deionized water, a change in color from gray to yellow and fluorescence enhancement accompanied with a redshift from 531 nm to 540 nm of fluorescence emission were immediately observed. This F- sensor can be recycled many times, making it cost efficient and beneficial to the environment. Analytical application of CpA1T5 to measure F- concentration in two commercial mouthwash samples was explored with good accuracy.
Visual and reversible detection of cyanide ions in protic solvents by a novel colorimetric receptor
Nie, Hong-Mei,Gong, Cheng-Bin,Tang, Qian,Ma, Xue-Bing,Chow, Cheuk-Fai
, p. 74 - 80 (2014/04/17)
A novel colorimetric chemodosimeter for cyanide (CN-) and 1-allyl-4-[2-(4-hydroxyphenyl)ethenyl)]-quinolinium bromide (AHPEQB) was designed and synthesized by condensation and terminal N alkyl reaction. AHPEQB exhibited highly selective and sensitive recognition properties toward CN - over other competing anions in ethanol, a protic solvent, with a 1:1 binding stoichiometry and a detection limit of 1.7 × 10-6 mol L-1. AHPEQB also displayed rapid colorimetric response that could be readily observed by the naked eye and good reversibility. The sensing mechanism of the proposed chemodosimeter was studied by UV-Vis, 1H NMR titration, and comparison 1-allyl-4-[2-(4-acetoxyphenyl)ethenyl)]- quinolinium bromide (AAPEQB). The colorimetric chemodosimeter showed high accuracy in determining the concentration of CN- in real water samples.
