57709-67-8

Upstream product

• 32315-10-9 bis(trichloromethyl) carbonate 
• 100-01-6 4-nitro-aniline 
• 95-54-5 1,2-diamino-benzene 
• 100-28-7 4-Nitrophenyl isocyanate 
• 859807-24-2 (4-nitro-phenyl)-carbamic acid trichloromethyl ester 

Downstream Products

• 1207684-52-3 C₄₆H₃₅N₉O₈ 
• 1345415-26-0 C₃₂H₂₅N₅O₄ 

Relevant academic research and scientific papers

Triple-signaling mechanisms-based three-in-one multi-channel chemosensor for discriminating Cu2+, acetate and ion pair mimicking AND, NOR, INH and IMP logic functions

Chemosensor 1 shows three different responses towards Cu2+, acetate and Cu(OAc)2 ion pair at different wavelengths independently in its absorption and fluorescence behaviour following a triple-signaling mechanism, namely, internal ch

The effect of the spacer of bis(biurea) ligands on the structure of A2L3-type (A=anion) phosphate complexes

By tuning the length and rigidity of the spacer of bis(biurea) ligands L, three structural motifs of the A2L3 complexes (A represents anion, here orthophosphate PO43-), namely helicate, mesocate, and mono-bridged motif, have been assembled by coordination of the ligand to phosphate anion. Crystal structure analysis indicated that in the three complexes, each of the phosphate ions is coordinated by twelve hydrogen bonds from six surrounding urea groups. The anion coordination properties in solution have also been studied. The results further demonstrate the coordination behavior of phosphate ion, which shows strong tendency for coordination saturation and geometrical preference, thus allowing for the assembly of novel anion coordinationbased structures as in transition-metal complexes.

Coumarin-based urea-amide scaffold in ratiometric fluorescence sensing of CN?

Coumarin-based urea and urea–amide scaffolds 1–3 have been designed and synthesized for the selective and naked eye detection of cyanide ion. Of the three, compound 3 exhibits ratiometric fluorescence change selectively in the presence of CN? and validates the rationality in designing anion receptor. Upon interaction with CN?, the color of the solution of 3 in CH3CN under UV exposure becomes bright yellow, which is beneficial for its naked eye detection. Addition of CN? of ～10?4?M brings nice color change from colourless to yellow in ordinary light. The sensing event is supposed to be due to nucleophilic addition of CN? to the coumarin unit enabling intramolecular charge transfer (ICT) mechanism.

From anion complexes to anion coordination polymers (ACPs): Assembly with a 1,5-naphthylene bridged bis-bisurea ligand

A 1,5-naphthylene-bridged bis-bisurea receptor (L) has been designed and its coordination behavior with various anions has been examined in the solid state and in solution. This rigid bis-bidentate ligand can act as a linker to afford one-dimensional anion coordination polymers (ACPs) and dinuclear complexes with a wide range of anions. In the ACPs, the anions occupy the nodes and the polymeric structure is held solely by the coordination (hydrogen bonds) of the ligand to the anion. The sulfate ion forms three different complexes with L, two of which are discrete 1 : 2 (host-guest) anion complexes and the third is an ACP. The complexes of acetate and terephthalate are also 1D ACPs. On the other hand, benzoate, chloride and bromide ions form dinuclear complexes with L. Solution binding studies of L toward the anions were carried out by 1H NMR, UV-vis and fluorescence titrations, from which the binding stoichiometry and stability constants were obtained.

Simple urea/thiourea sensors for the biologically important ions

Two anion receptors 1 and 2 with a nitrophenyl group as a signaling group and urea/thiourea as a binding group were synthesized and their anion binding abilities were examined. The receptor 1 formed the hydrogen-bonded complex with various anions except f

Triphenylamine-based simple chemosensor for selective fluorometric detection of fluoride, acetate and dihydrogenphosphate ions in different solvents

Triphenylamine-based new chemosensors 1 and 2 have been designed and synthesized for fluorometric detection of anions. The urea-amide conjugates in 1 and 2 are involved in binding of anions via hydrogen bonding. UV-vis and fluorescence titration experimen

Triphenylamine-based receptor for selective recognition of dicarboxylates

A new triphenylamine-based receptor 1 has been designed and synthesized for the recognition of aliphatic dicarboxylates of various chain lengths. This receptor has been designed to utilize an amide-urea conjugate for binding dicarboxylates. The receptor 1

Anthracene-based ortho-phenylenediamine clefts for sensing carboxylates

Two ortho-phenylenediamine-based new receptors 1 and 2 with an anthracene-coupled benzimidazolium motif have been designed and synthesized. The directed hydrogen bonds (both conventional and unconventional) and charge-charge interactions allowed the open clefts of both 1 and 2 to bind carboxylate, fluoride and dihydrogenphosphate anions with moderate binding constant values. The selectivity and sensitivity were ascertained by 1H NMR, UV-vis and fluorescence spectroscopic methods. The binding cleft of 2 is found to be more effective than that of 1.