Density, speed of sound, and surface tension of binary aqueous solutions containing ammonium based protic ionic liquids

Volumetric, Compressibility, Spectroscopic, and Theoretical Evaluation of Interactions between Caffeine and Ethanolammonium Butyrate in Aqueous Solutions

“…The [EABu] was synthesized using the reported method. , Briefly, the neutralization reaction was performed at 278.15 K by dropwise addition of butyric acid to the ammonium base (ethanolamine) in a double neck round bottom flask. The mixture obtained was viscous and was continuously stirred for 24 h at room temperature.…”

“…The 1 H NMR spectra of [EABu] are provided in Supporting Information Figure S1. FT-IR spectra of [EABu] have a broad band of (>CO) carbonyl stretching combined with −N–H plane bending vibration at 1600 cm –1 . The ammonium peak and O–H stretching vibrations were observed as characteristic peaks from 2400 cm –1 to 3500 cm –1 …”

Aggregation induced emission based fluorenes as dual-channel fluorescent probes for rapid detection of cyanide: applications of smartphones and logic gates

“…Compound 1b; yield: 80%; R f ¼ 0.72 (n-hexane); 1 H-NMR (400 MHz, CDCl 3 ) (d ppm); 7.77 (d, J ¼ 7.2, 1H, ArH), 7.73 (d, J ¼ 7.8, 3H, ArH), 7.65 (s, 1H, ArH), 7.54 (d, J ¼ 8.5, 2H, ArH), 7.38-7.29 (m, 3H, ArH), 7.09 (t, J ¼ 7.8, 1H, ArH), 6.97 (d, J ¼ 8.6, 2H, ArH), 4.10 (q, J ¼ 7.0, 2H, ArH), 1.47 (t, J ¼ 6.7, 3H, CH 3 ). 13 UV-visible and uorescence experiments 1000 mM stock solutions of cyanide and all other anions (in the form of sodium salts) were prepared in H 2 O/DMF (4 : 1, v/v). Targeted anions include CN À , F À , Cl À , Br À , I À , ClO 4 À , N 3…”

“…butoxide as a base. The resulted compounds were characterized by 1 H, 13 C, and DEPT-135 NMR spectroscopy and are given in ESI (p. S19-S74 †).…”

“…tetraphenylethylene, 7 distyrylanthracene, 8 silole, 9 and carbazole derivatives 10 have been designed and synthesized depending upon different approaches. Previous studies proposed numerous mechanisms to decipher the AIE phenomenon such as restricted intramolecular rotation (RIR), 11 twisted intramolecular charge transfer (TICT), 12 intramolecular charge transfer (ICT), 13 and cis-trans isomerization. 14 One effective strategy to induce AIE character is the installation of strong electron donor (D) moieties in uorescent probes.…”