Silica nanoparticles functionalized with thiol reactive units and bulky polar polyamines were used for the selective colorimetric detection of formaldehyde. The reaction thiols groups in surface a squaraine dye resulted loss π-conjugation chromophores, subsequent bleaching solution. However, when formaldehyde was present suspension, thiol-squaraine inhibited chromogenic response observed. A to observed only polyamine anchored silica surface. ascribed fact that generate highly environment...

Abstract An anthracene‐functionalised cyclam–copper(II) complex for the detection of HS – in aqueous environments has been prepared. This probe displays poor fluorescence but can selectively and sensitively detect anions water over other anions, biothiols common oxidants such as H 2 O through remarkably enhanced emission. turn‐on response presence anion is ascribed to a demetallation reaction that inhibits emission quenching observed initial result paramagnetic Cu 2+ centre. Moreover,...

The synthesis, characterization and sensing features of a novel probe 1 for the selective chromogenic recognition diisopropylfluorophosphate (DFP), sarin soman mimic, in 99:1 (v/v) water/acetonitrile gas phase is reported. Colour modulation based on combined reaction phosphorylation fluoride-induced hydrolysis silyl ether moiety. As fluoride specific product between DFP -OH group, shows colour presence this chemical. Other nerve agent simulants, certain anions, oxidant species other...

Mesoporous silica nanoparticles loaded with safranin O and capped disulfide-containing oligo(ethylene glycol) chains were used for the selective sensitive fluorimetric detection of GSH.

Cu(II) -macrocycle functionalized hexametaphosphate-capped silica mesoporous nanoparticles have been prepared and used for the selective sensitive detection of hydrogen sulfide in aqueous environments. The possibility using different metal complexes combined with capping anions choice dyes or other sensing molecules as indicators makes this new protocol highly appealing preparation systems

Trivalent cations induced a dehydration reaction of chemodosimeter in water that is coupled with colour and emission changes.

The fast and the fluoride: A pyridine derivative functionalized with tert-butyldimethylsilyl ether has been synthesized used as a selective chromofluorogenic fluoride sensor in water/cetyltrimethylammonium bromide solutions. response arises from fluoride-induced hydrolysis of silyl moiety, which generates coloured highly emissive phenolate anion. development sensors for anions is well-established studied field supramolecular chemistry realm.1 This due to important roles biological processes,...

Chromo-fluorogenic detection of GSH versus cysteine in water was accomplished using a pyrylium-stilbene derivative and CTAB micelles.

The development of easy and affordable methods for the detection cyanide is great significance due to high toxicity this anion potential risks associated with its pollution. Herein, optical in water has been achieved by using a hybrid organic-inorganic nanomaterial. Mesoporous silica nanoparticles were loaded [Ru(bipy)3 ]2+ , functionalized macrocyclic nickel(II) complex subunits, capped sterically hindering (hexametaphosphate). Cyanide selectively induces demetallation complexes removal...

Mesoporous silica nanoparticles loaded with rhodamine B and capped acetylcholinesterase are able to be selectively opened deliver their cargo in the presence of nerve agent simulant diisopropyl fluorophosphate (DFP).

Abstract A simple chemodosimeter based on a sulfonyl azide dye ( 1 ‐Az), which displayed highly selective response toward hydrogen sulfide anion in mixed aqueous media, was synthesised and characterised. Addition of to acetonitrile/HEPES 1:1 solutions ‐Az induced clear colour change from red‐orange yellow, easily detected by the naked eye, an enhancement emission intensity. Other common anions, thiol‐containing biomolecules oxidants did not induce any noticeable or fluorescence modulation...

A new fluorescent turn-on probe for the selective detection of hydrogen sulfide in water and living cells based on a 8-hydroxyquinoline fluorophore functionalized with 2,6-dinitrophenyl ether moiety has been developed.

Cu(<sc>ii</sc>) coordination with aldehyde-containing probes induced the appearance of NIR bands coupled remarkable colour changes.

A nanodevice based on mesoporous silica nanoparticles with rhodamine B in the pore framework, functionalized carboxylates outer surface and capped cationic polymyxin peptide, was used to selectively detect endotoxin aqueous solutions a limit of detection picomolar range.

Four probes (i.e. D1–D4) for the selective and sensitive fluorogenic detection of HS− have been prepared characterised. HEPES (10 mM, pH 7.4)–DMSO 99:1 v/v solutions D1–D4 are essentially non-fluorescent. Changes in emission using presence anions (F− , Cl− Br− I− CN− SCN− AcO− OH− ), biothiols (GSH, Cys, Hcy, Me–Cys lipoic acid), reducing agents ( ) oxidants (H2O2) demonstrated that only is able to induce appearance intense bands 400–520 nm range four probes. The selectivity observed was...

Abstract Three different mesoporous silica nano‐sized materials ( SC1 , SC2 and SC3 ), loaded with [Ru(bipy) 3 ] 2+ dye (bipy=bipyridine) functionalized on the external surface three macrocyclic copper(II) complexes C1 C2 C3 were synthesized characterized. When suspended in water, entrapped was free to diffuse from inner pores solution. However, addition of anions induced certain degrees pore blockage, subsequent release inhibition. Small monovalent divalent unable induce complete whereas...

The covalent immobilization of penicillin G acylase (PGA) onto the surface NH2–poly(vinyl chloride) (PVC) membranes was studied. PGA chosen because it plays a relevant role in pharmaceutical industry, catalyzing production an important intermediate for industrial semisynthetic and cephalosporine. Because PVC has no functional groups its structure, this work, we focused on functionalization with primary amine PGA. This goal achieved through aminoalkylation process ethylene diamine followed by...

Financial support from the Spanish Government (Project MAT2012-38429-C04), Generalitat Valencia PROMETEOII/2014/047) and CIBER de Bioingenieria, Biomateriales y Nanomedicina (CIBER-BBN) is gratefully acknowledged.

Two different acetylcholinesterase (AChE)-capped mesoporous silica nanoparticles (MSNs), S1-AChE and S2-AChE, were prepared characterized. MSNs loaded with rhodamine B the external surface was functionalized either pyridostigmine derivative P1 (to yield solid S1) or neostigmine P2 obtain S2). The final capped materials obtained by coordinating grafted AChE's active sites give respectively). Both able to release in presence of diisopropylfluorophosphate (DFP) a concentration-dependent manner...