Liang, Hua published the artcileOrtho-hydroxyl-oriented tandem-responsive diacylhydrazones with super sensitivity for Al3+ and subsequent potential recognition of Cu2+, SDS of cas: 1207448-58-5, the publication is Sensors and Actuators, B: Chemical (2018), 62-69, database is CAplus.
Structure is a crucial factor to decide the selectivity and sensitivity of chemosensors. In this work, a diacylhydrazone 2a and its congeneric derivatives 2b-2d were synthesized and their applications for Al3+ detection were investigated. Except 2d, all the other compounds exhibit notable turn-on fluorescence toward Al3+ over 15 other metal ions and the sensitivities of 2b and 2c are even higher after modification, illustrating ortho-OH indispensability in their structures for sensing. Reversibility investigation shows that the sensors all have regeneration ability. Meanwhile, the sensor-Al3+ systems show selective fluorescence turn-off for Cu2+, providing a potential platform for tandem recognition of Al3+ and Cu2+. 2a as a standard, shows a 1:2 molar ratio to Al3+ confirmed by Job′s plot, 1H NMR spectra and mass spectra, and its detection limit for Al3+ is 7.63 nM in ethanol. It has relevant sensitivity over pH 3-9, with the highest sensitivity at around pH 4. Apart from Al3+ detection, anion selectivity was also explored and it shows that 2a, 2b and 2c all have selectivity toward CN– evidenced by UV-vis spectra.
Sensors and Actuators, B: Chemical published new progress about 1207448-58-5. 1207448-58-5 belongs to bromides-buliding-blocks, auxiliary class Bromide,Benzene,Phenol,Ether,Aldehyde, name is 4-((6-Bromohexyl)oxy)-2-hydroxybenzaldehyde, and the molecular formula is C13H17BrO3, SDS of cas: 1207448-58-5.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary