A bistren cryptand with a remote thioether function: Cu(ii) complexation in solution and on the surface of gold nanostars

Abstract

A di-copper(ii) complex is formed in a bis-tren cage featuring a thioether function, capable of grafting on a monolayer of gold nanostars.

Synthesis and Study in Solution of a New Dansyl-Modified Azacryptand

“…Bistren symmetric cryptands are usually synthesized through Schiff base condensation of two molecules of tris(2-aminoethyl)amine (tren) and three molecules of the desired dialdehyde [37,38] followed by reduction with NaBH 4 of the imine groups. The new asymmetric azacryptand presented in this work required a multistep synthesis (see Scheme 2 in Section 2) recently described by our group [26,31,33]. In particular, 1 mol of mono-BOC-protected tren was first reacted with 1 mol of the 1,4-p-xylyl dialdehyde, obtaining the intermediate polyimine macrocycle 1.…”

“…The dialdehyde 1 was obtained following the procedures reported in the literature [31]. Reagent 2 was prepared by modifying a described procedure [32].…”

A Nanoprobe Based on Gated Mesoporous Silica Nanoparticles for The Selective and Sensitive Detection of Benzene Metabolite t,t‐Muconic Acid in Urine

“…From another point of view, azacryptands are supramolecular metal complexes that are constituted by an organic core (azacryptand) with two coordinated metal ions [29] . Within these metal complexes, those formed by bistren cryptands (obtained by the reaction of two tris(2‐aminoethyl)amine and three dialdehyde linkers) and Cu II have been extensively used for the selective coordination of several dicarboxylates [30–32] . In particular, very recently, Amendola and co‐workers have demonstrated that t,t‐MA can coordinate effectively to a dicopper(II) bistren azacryptand and developed an indicator displacement assay for the fluorescence sensing of this benzene metabolite [33] …”

“…[29] Within these metal complexes, those formed by bistren cryptands (obtained by the reaction of two tris(2-aminoethyl)amine and three dialdehyde linkers) and Cu II have been extensively used for the selectivec oordination of several dicarboxylates. [30][31][32] In particular,v ery recently,A mendola and co-workers have demonstrated that t,t-MA can coordinate effectively to ad icopper(II) bistren azacryptanda nd developeda ni ndicator displacement assay for the fluorescences ensing of this benzene metabolite. [33] Based on the above, and following our interest in the development of hybrido rganic-inorganicm aterials for the design of chromo-fluorogenics ensing protocols as an alternative to molecular based probes, [34][35][36][37][38][39][40][41] we report herein the synthesis and characterization of ag ated nanodevice for the selectivea nd sensitiveq uantification of t,t-MA in urine.…”

Weak and Reversible Binding of Alkali Metal Ions (Na+/K+) by an Aza‐Oxa Cryptand

“…These cages can be used for capturing cations, anions as well as small molecules according to the cavity size and presence of donor atoms or functional groups at strategic positions . Capturing of the guest is effective when cryptands are immobilized in a solid phase or nanomaterials . Presence of donor atoms such as N, P or S in a cryptand have a strong tendency to bind transition and heavy metal ions inside the cavity.…”