Self-recognition behavior of novel frameworks containing both urea and carboxylate anion motifs

Developing new derivatives of 3‐X‐4‐hydroxy‐2(1H)‐quinolone as quinoline‐based chemosensors for detecting fluoride: Theoretical study on nucleophilicity and hydrogen‐bonding via various analyses

“…[29] One of the interesting approaches in the designing of chemosensors is constructing hydrogen-bonding sites. [30,31] Considerable research has been devoted to the designing of quinoline-based receptors that show high selectively recognizing anions. Various mechanisms are known to detect the anions that comprise intramolecular charge transfer (ICT), [32] metal-to-ligand charge transfer (MLCT), [33] and anion-induced fluorescent quenching (AIFQ).…”

Visible colorimetric fluoride and hydroxide sensing by asymmetric tris-urea receptors: combined experimental and theoretical studies

“…7,8 Nowadays, an interesting approach in the use of urea based receptors as a hydrogen bond donor in the recognition of anions have attracted much attention. [9][10][11][12][13] In particular, considerable research efforts have been devoted to the designation of receptors containing one ureido subunit, which are good at selectively recognizing uoride. [14][15][16] In particular, two equivalents of F À ions could induce the solution colour of 1,3bis(4-nitrophenyl)urea change from colourless to orange-red.…”

Tetraphenylene-Coated Near-Infrared Benzoselenodiazole Dye: AIE Behavior, Mechanochromism, and Bioimaging

“…In our previous reports, the D−π–A−π–D type fluorescence dyes have a typical characteristic of intramolecular charge transfer (ICT). To further understand thoroughly the molecular structure and electronic properties, subsequently its time-dependent density functional theory (TD-DFT) calculations were performed at the B3LYP/6-31G* level with the Gaussian 09 program to reveal its frontier molecular orbitals and electronic transitions . The maximum absorption and corresponding molecular orbitals for these major electronic transitions are shown in Figure B.…”