Selective acetate recognition and sensing using SWCNTs functionalized with croconamides

• Noble selector molecules composed of asymmetric N,N- substituted croconamides with strong binding affinity anions. The unique design croconamide-based selectors providing versatile utility for chemiresistive anion sensing platforms. Practical application real-time and rapid screening various oxoanions. Croconamides are a new class dual-hydrogen bond donors that have attracted interest in recognition applications due to their H-bond donation capability. In this work, we report sensors the detection anions based on poly(4-vinylpyridine) (P4VP)-wrapped single-walled carbon nanotubes (SWCNTs) functionalized selectors. Model structures N,N -substituted croconamide -substitutional groups alkyl cationic pyridinium electron-withdrawing moieties such as aniline ( 6 ) 3,5-bis(trifluoromethyl)phenyl 7 were synthesized affinities characterized using UV–vis 1 H NMR titrations. Switchable oxoanions was observed , wherein HSO 4 – formed hydrogen bonding interactions acetate (AcO induced deprotonation NH protons croconamide. Large sensitivity transitions obtained toward AcO both P4VP- -SWCNT (S = 95.68 ± 2.11 %) 140.91 3.68 at 83.33 mM, which attributed upon addition . Three serial assembled sensor array selective demonstrated against other 2 PO real-time.