An imine linked fluorescent covalent organic cage: the sensing of chloroform vapour and metal ions, and the detection of nitroaromatics

poly ether-block-amide (PEBAX)-2533/metal salt/Al salt membranes were prepared for mixed olefin/paraffin separation. PEBAX-2533 with 80% ether group and 20% amide group was suggested as the polymer matrix for comparison of separation performance according to the functional group ratio in copolymer PEBAX. In addition, Al salts were used to stabilize metal ions for a long time as additives. High permeance was expected with the proportion of high ether groups, since these functional groups provided relatively permeable regions. As a result, the PEBAX-2533 composite membrane showed a selectivity of 5 (propylene/propane) with 10 GPU. However, the permeance of membrane was not unexpectedly improved and the selectivity was reduced. The result was analyzed by using SEM, RAMAN and thermogravimetric analysis (TGA), including Fourier transform infrared (FTIR). The reduction in separation performance was determined by using FT-IR. Based on these results, in order to stabilize the metal ions interacting with the polymer through Al(NO3)3, it was concluded that a specific ratio of the amide group was needed in PEBAX as a polymer matrix.

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Incorporation of nano-particle sites in polymer matrix by Metal ion imprinting

MRS Proceedings ◽

10.1557/proc-501-199 ◽

1997 ◽

Vol 501 ◽

Cited By ~ 1

Author(s):

Alok Singh ◽

Dhananjay Puranik ◽

Yan Guo ◽

Daniel Zabetakis ◽

Eddie L. Chang

Keyword(s):

Metal Ions ◽

Polymer Matrix ◽

Metal Binding ◽

Metal Ion ◽

Polymeric Materials ◽

Rigid Polymer ◽

Optical And Electronic Properties ◽

The Matrix ◽

Ion Imprinting ◽

Ion Size

ABSTRACTWe present an approach for synthesizing polymer matrices that have been pre-organized to bind metal ions selectively. The acyclic chelator, triethylenetetramine, was modified to include a polymerizable functional group and then complexed with a target metal ion. Unlike macro cyclic ligands, the acyclic chelators have the flexibility to form chelation rings that are dependent on metal-ion size and geometry. Therefore, we have used the complexation step as a means to optimize the chelator conformation for a particular metal ion. The resulting complex was then cross linked with the matrix monomer, TRIM (2-ethyl-2-(hydroxymethyl)propane-1,3-diol trimethacrylate), to provide a rigid polymer matrix for stabilization of the conformation for the metal-ligand site. These sites were then tested for selectivity towards the imprinted metal ion. Unlike imprinting for larger molecules, the relatively smaller size of the metal ions facilitated their access to the imprinted sites embedded in the porous polymers. In addition to metal-binding applications, polymeric materials doped with metal nanoparticles and metal ions can exhibit interesting physical, chemical, optical and electronic properties.

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Systematic Study on Sensing Capability of Gold(I) Pyrazolate Complex for Vapochromic Chemosensors of Ethanol Vapors

Journal of the Indonesian Chemical Society ◽

10.34311/jics.2020.03.1.38 ◽

2020 ◽

Vol 3 (1) ◽

pp. 38

Author(s):

Almira Praza Rachmadian ◽

Matheus Randy Prabowo ◽

Nur Fatiha Ghazalli ◽

Hendrik O. Lintang

Keyword(s):

Metal Ions ◽

Benzene Ring ◽

Systematic Study ◽

Emission Intensity ◽

Diffusion Time ◽

Gold Complexes ◽

Organic Vapors ◽

Light Emitting ◽

Quenching Phenomenon

Modified gold complexes as dinuclear adducts with silver bridge ions, clusters with other metal ions, and bimetallic sandwiches have shown better sensing capabilities for vapochromic chemosensing of organic vapors than its unmodified structure. Herein, a simple gold(I) complex, synthesized from 4-(3,5-dimethoxybenzyl)-3,5-dimethyl pyrazole ligand, have been shown to have higher sensing capability toward ethanol (EtOH) vapors. Such sensing capability can be possibly achieved when EtOH vapors have enough time to diffuse to the main sensing sites of the sensor. Thus, 80 to 160 µL (with 20 µL increment) of EtOH vapors were exposed to the synthesized gold(I) pyrazolate complex at varied distances of 2.75, 11 and 22 cm for 15 minutes. The complex displayed its sensing capability by quenching at its emission intensity of 600 nm up to 80%, which suggests the possible interaction of the EtOH vapors with the inner sensing site originated from the Au(I)–Au(I) interaction of the complex where it is possible to breakdown the light-emitting capability. Prior to this interaction, there was only a slight blue-shifting of 9 nm away from its emission intensity by the binding of EtOH vapors to the methoxy of benzene ring hence only demonstrating weak sensing capability. These results indicated that sensing capability as shown by the quenching phenomenon at the emission intensity of gold(I) complex is dependent on diffusion time of EtOH vapors.

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Conducting polymer and metal–complex composites formed by complexation of the ligands from the vapour phase

RSC Advances ◽

10.1039/c6ra05463c ◽

2016 ◽

Vol 6 (35) ◽

pp. 29448-29452 ◽

Cited By ~ 2

Author(s):

David Mayevsky ◽

Orawan Winther-Jensen ◽

Bjorn Winther-Jensen

Keyword(s):

Metal Complex ◽

Metal Ions ◽

Conducting Polymer ◽

Polymer Matrix ◽

Vapour Phase ◽

First Time

Coordinating ligands to metal-ions inside a conducting polymer matrix via complexation from the vapour phase was shown for the first time.

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Pengaruh Jumlah Mol Kroslinker Pada Selektifitas IIP Berbasis Polieugenol Terhadap Fe(III)

ALCHEMY Jurnal Penelitian Kimia ◽

10.20961/alchemy.14.2.12426.291-302 ◽

2018 ◽

Vol 14 (2) ◽

pp. 290

Author(s):

Muhammad Cholid Djunaidi ◽

Abdul Haris ◽

Pardoyo Pardoyo ◽

Rosdiana K

Keyword(s):

Polyethylene Glycol ◽

Metal Ions ◽

Polymer Matrix ◽

Metal Ion ◽

Adsorption Process ◽

Ion Adsorption ◽

Imprinted Polymer ◽

Adsorption Selectivity ◽

Metal Ion Adsorption

Sintesis Ionic Imprinted Polymer (IIP) dilakukan dengan variasi penambahan crosslinker PEGDE (Polyethylene glycol diglycidilether) yang kemudian diuji selektivitas IIP terhadap ion logam Fe melalui proses adsorpsi. IIP merupakan metode mencetak ion logam yang terikat dalam polimer, selanjutnya dilepaskan dari matriks polimer menghasilkan cetakan yang sesuai terhadap ion target. Tujuan penelitian ini untuk menghasilkan IIP dan NIP dari polieugenol dengan variasi penambahan crosslinker PEGDE perbandingan sebanyak 1, 2 dan 3 mol, mengetahui pengaruh jumlah mol crosslinker terhadap selektivitas adsorpsi IIP yang melibatkan rongga imprint/cetakan, serta mengetahui pengaruh logam kompetitor terhadap selektivitas adsorpsi IIP terhadap logam Fe. Selektivitas adsorpsi ion logam Fe(III) dengan penambahan crosslinker PEDGE 3 mol lebih besar dibandingkan dengan penambahan crosslinker PEGDE 1 dan 2 mol. Selektivitas adsorpsi Fe lebih besar pada Fe-Cr dibandingkan dengan Fe-Cd dan Fe-Pb.Influence of Crosslinker Mole Amount on the Selectivity IIP-Based Polyeugenol Towards Fe(III). The synthesis of IIP (Ionic Imprinted Polymer) was carried out using PEGDE (Polyethylene glycol diglycidilether) crosslinker addition in various moles which was then tested for IIP selectivity for Fe metal ions through the adsorption process. IIP is a method of metal ions printing which are bound in a polymer, then released from the polymer matrix to produce a suitable mold for the target ion. The purposes of this study were to produce IIP and non imprinted polymer (NIP) from polyeugenol with the addition of various moles of PEGDE crosslinkers as much as 1, 2 and 3 moles, and to determine the effect of the number of mole crosslinkers on the selectivity of IIP adsorption involving imprint/mold cavities, and the effect of competitor metals on IIP adsorption selectivity towards Fe metal. The selectivity of Fe (III) metal ion adsorption with the addition of 3 mole PEDGE crosslinkers was greater than the addition of 1 and 2 moles PEGDE crosslinkers. The selectivity of Fe adsorption is was greater in Fe-Cr compared to Fe-Cd and Fe-Pb.

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Complexes of carbohydrates with metal cations. III. Conformations of alditols in aqueous solution

Australian Journal of Chemistry ◽

10.1071/ch9741447 ◽

1974 ◽

Vol 27 (7) ◽

pp. 1447 ◽

Cited By ~ 74

Author(s):

SJ Angyal ◽

D Greeves ◽

JA Mills

Keyword(s):

Aqueous Solution ◽

Complex Formation ◽

Metal Ions ◽

Chloroform Solution ◽

Metal Cations ◽

Carbon Carbon Bonds ◽

Carbon Bonds ◽

Oxygen Atoms

Complex formation of alditols with metal ions in aqueous solution has been investigated by electrophoresis and by the study of the N.M.R. spectra in the presence of europium ions. Complexing occurs at three consecutive oxygen atoms which are in a gauche-gauche arrangement; the energy required to form this arrangement (by rotation around carbon-carbon bonds) determines the extent of complex formation. It appears that the alditols in aqueous solution are essentially in the same conformations as are their acetates in chloroform solution.

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Synthesis of Polymer Inclusion Membranes based on Cellulose Triacetate for Recovery of Lanthanum(III) from Aqueous Solutions

Autex Research Journal ◽

10.1515/aut-2018-0056 ◽

2019 ◽

Vol 19 (3) ◽

pp. 288-292 ◽

Cited By ~ 1

Author(s):

Adam Makowka ◽

Beata Pospiech

Keyword(s):

Aqueous Solution ◽

Phosphoric Acid ◽

Aqueous Solutions ◽

Metal Ions ◽

Polymer Matrix ◽

Tributyl Phosphate ◽

Cellulose Triacetate ◽

Nitrophenyl Octyl Ether ◽

Source Phase ◽

Ion Carrier

Abstract Polymer inclusion membrane (PIM) containing cellulose triacetate (CTA) as a polymer matrix and 2-nitrophenyl octyl ether (NPOE) as a plasticizer was developed. This membrane also contained di(2-ethylhexyl)phosphoric acid (D2EHPA) and tributyl phosphate (TBP) as the carriers of metal ions. The facilitated transport of lanthanum(III) from aqueous nitrate(V) solutions across PIM was studied. It was observed that metal ions were transported from the source phase into 2M H2SO4 as the receiving phase. The transport through PIM with D2EHPA as the ion carrier was found as the more effective method of lanthanum(III) removal from the aqueous solution than transport through PIM with TBP as the ion carrier.

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A Novel Fluorescence “Turn-Off” Sensor Base On A Triazole-Linked BINOL-Glucose Derivative For The Sensitive Detection of Copper Ion

10.21203/rs.3.rs-777885/v1 ◽

2021 ◽

Author(s):

Huizhen Wang ◽

Yang Liu ◽

Xiaoxia Sun ◽

Yu Hu

Keyword(s):

Detection Limit ◽

Metal Ions ◽

Emission Intensity ◽

Color Change ◽

Click Reaction ◽

Fluorescence Emission ◽

Copper Ion ◽

Sensitive Detection ◽

Fluorescence Emission Intensity ◽

Glucose Derivative

Abstract A novel sensitive chiral fluorescent “turn-off” sensor based on 3,3′-positions modified triazole-linked BINOL-Glucose derivative has been synthesized via “click” reaction. The fluorescence emission intensity of (S, β-D)-1 was almost completely quenched along with obvious color change from yellow to green upon the coordination with a Cu(II) ion while other metal ions had no obvious change. The detection limit of the sensor (S, β-D)-1 toward copper ion was calculated to be 0.31 μmol L-1. The stoichiometry ratio of (S, β-D)-1-Cu2+ complex was proved to be 1:1 by the analysis of NMR spectroscopic, ESI-MS data and the job’s plot. HNMR spectroscopic and IR were also used to study the mechanism, demonstrated copper ion was coordinated with (S, β-D)-1 by 1+1complex formation.

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