Triphenylamine-based receptor for selective recognition of dicarboxylates

Anion binding with urea and thiourea derivatives

“…Preorganization of the receptors was achieved by using various spacers between the ( [90], piperazine [91], biindolyl [92], alkylenes [93], triphenylamine [94], dithienylethene [95], polyethylene glycol chain [96], diphenoxymethane or biphenol [97], Pybox [98] Bisurea anion receptors substituted with benzene at the o-position were studied by Gale et al [55,71f,g]. Binding study of receptor 59 with halides and oxoanions in the mixture of DMSO-d 6 and 0.5 % water was performed by 1 H NMR titrations giving the Page 33 of 108 A c c e p t e d M a n u s c r i p t complex stability constants, for example K 11 (AcO -) = 3210 mol -1 dm 3 , and K 11 (C 6 H 5 COO -) = 1330 mol -1 dm 3 .…”

A New Chemosensing Ensemble for Colorimetric Detection of Oxalate in Water

“…For instance, the level of oxalate in urine is an indicator of calcium oxalate kidney stones. 24 Although a vast number of artificial receptors for dicarboxylates have been developed during the past decade, [25][26][27][28][29][30][31][32][33][34] very few examples of optical sensors for oxalate have been reported to date. 35,36 Thus, there is an urgent need to develop new watersoluble artificial receptors for the detection of oxalate under physiological conditions.…”

Triphenylamine‐Based Open and Macrocyclic Receptors: A Study Towards Selectivite Recognition of Aliphatic Dicarboxylates

“…The syntheses of receptors 1 and 2 are outlined in Scheme . It starts with triphenylamine dicarboxylic acid 3 , which was synthesized using reported procedure . Compound 3 was first treated with oxalyl chloride in dry CH 2 Cl 2 in the presence of catalytic amount of DMF to afford the diacid chloride 4 which on subsequent reaction with excess o ‐phenylenediamine gave the diamine 5 .…”