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

RSC Advances ◽  
2016 ◽  
Vol 6 (35) ◽  
pp. 29448-29452 ◽  
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.

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

2021 ◽  
Author(s):  
Ramesh Kumar Gajula ◽  
Subhrajit Mohanty ◽  
Manjari Chakraborty ◽  
Moloy Sarkar ◽  
M. Jaya Prakash
Keyword(s):  
Metal Ions ◽  
Polymer Matrix ◽  
Emission Intensity ◽  
Chloroform Solution ◽  
Cage Molecule ◽  
Film Form

Fluorescent covalent organic cage molecule (F-COC) showed enhanced emission intensity in chloroform solution and polymer matrix film form in presence of chloroform vapours.

IODINE FRACTALS IN ION CONDUCTING POLYMER MATRIX

Fractals ◽  
2001 ◽  
Vol 09 (02) ◽  
pp. 171-175 ◽  
Author(s):  
AMITA CHANDRA
Keyword(s):  
Conducting Polymer ◽  
Polymer Matrix ◽  
Strain Field ◽  
Polymeric System ◽  
Fluorescence Studies ◽  
Random Walkers ◽  
Diffusion Limited ◽  
Large Size ◽  
Ion Conducting ◽  
Ion Conducting Polymer

Large size diffusion limited aggregates (DLA) in ion conducting polymeric system, PEO:NH 4 I (+ Al 2 O 3), have been obtained. The species responsible for the formation of the DLA have been identified as [Formula: see text] by fluorescence studies. It is also shown that if I 2 gets formed (instead of [Formula: see text] aggregates) at selected regions, then "strain field" is established which forbids further approach of ionic random walkers and hence no fractals grow around these regions.

The effect of plasticization on the properties of poly(urethaneureas) based on oligoether diols, 2,4-toluenediisocyanate, and aromatic diamines

2018 ◽  
Vol 51 (4) ◽  
pp. 337-358 ◽  
Author(s):  
Vasiliy Tereshatov ◽  
Marina Makarova ◽  
Valeriy Senichev ◽  
Zhanna Vnutskikh ◽  
Tamara Oshchepkova ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polymer Matrix ◽  
Arctic Climate ◽  
The Arctic ◽  
Aromatic Diamines ◽  
Plasticization Effect ◽  
Soft Segments ◽  
Potential Applications ◽  
Partial Crystallization ◽  
First Time

Segmented poly(urethaneureas) (SPUUs) modified with low glass transition temperature chemically inert liquids are of interest due to their controllable properties and potential applications under various environmental conditions. Investigation into the influence of plasticizers on the properties of SPUUs based on oligotetramethyleneoxide diol (polytetramethyleneoxide), oligopropyleneoxide diol (polypropyleneoxide), 2,4-toluenediisocyanate, Ethacure-300, and methylene-bis- o-chloroaniline was conducted. Partial crystallization of polytetramethyleneoxide segments was identified during cooling of some SPUU samples plasticized by di-(2-ethylhexyl)sebacate (DEHS) and tributyl phosphate. Polypropyleneoxide segments did not crystallize under the same conditions. A low crystallization temperature for the amorphous component of the polymer matrix in SPUU (−100°C to 103°C) was attained at a molecular mass ( Mn) of soft segments equal to 2000 g mol−1 and a DEHS concentration equal to 40–45%. A relationship between the mechanical properties of plasticized SPUU, microphase segregation, and dilution of the polymer matrix was found. For the first time, the effect of dilution with plasticizer on the strength of elastomers was considered. The plasticization effect on the mechanical properties of SPUU was investigated in the temperature diapason from 50°C to −70°C. The results of these investigations can be used in various technologies including the design of SPUUs with high elastic properties at temperatures as low as −70°C, typical of extreme conditions of the Arctic climate.

scholarly journals Correlation between Functional Group and Formation of Nanoparticles in PEBAX/Ag Salt/Al Salt Complexes for Olefin Separation

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 667
Author(s):  
So Young Kim ◽  
Younghyun Cho ◽  
Sang Wook Kang
Keyword(s):  
Fourier Transform ◽  
Metal Ions ◽  
Polymer Matrix ◽  
Functional Group ◽  
Metal Salt ◽  
Amide Group ◽  
Separation Performance ◽  
Ether Group ◽  
Long Time ◽  
Ft Ir

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.

scholarly journals Trends and Exceptions in the Interaction of Hydroxamic Acid Derivatives of Common Di- and Tripeptides with Some 3d and 4d Metal Ions in Aqueous Solution

Molecules ◽  
2019 ◽  
Vol 24 (21) ◽  
pp. 3941 ◽  
Author(s):  
Ozsváth ◽  
Bíró ◽  
Nagy ◽  
Buglyó ◽  
Sanna ◽  
...  
Keyword(s):  
Metal Ions ◽  
Hydroxamic Acid ◽  
Hydroxamic Acids ◽  
17O Nmr ◽  
Equilibrium Study ◽  
Sandwich Type ◽  
Uv Visible ◽  
First Time ◽  
Derivatives Of ◽  
Half Sandwich

By using various techniques (pH-potentiometry, UV-Visible spectrophotometry, 1H and 17O-NMR, EPR, ESI-MS), first time in the literature, solution equilibrium study has been performed on complexes of dipeptide and tripeptide hydroxamic acids—AlaAlaNHOH, AlaAlaN(Me)OH, AlaGlyGlyNHOH, and AlaGlyGlyN(Me)OH—with 4d metals: the essential Mo(VI) and two half-sandwich type cations, [(η6-p-cym)Ru(H2O)3]2+ as well as [(η5-Cp*)Rh(H2O)3]2+, the latter two having potential importance in cancer therapy. The tripeptide derivatives have also been studied with some biologically important 3d metals, such as Fe(III), Ni(II), Cu(II), and Zn(II), in order to compare these new results with the corresponding previously obtained ones on dipeptide hydroxamic acids. Based on the outcomes, the effects of the type of metal ions, the coordination number, the number and types of donor atoms, and their relative positions to each other on the complexation have been evaluated in the present work. We hope that these collected results might be used when a new peptide-based hydroxamic acid molecule is planned with some purpose, e.g. to develop a potential metalloenzyme inhibitor.

scholarly journals Unraveling vertical inhomogeneity in vapour phase polymerized PEDOT:Tos films

2020 ◽  
Vol 8 (36) ◽  
pp. 18726-18734
Author(s):  
Shangzhi Chen ◽  
Ioannis Petsagkourakis ◽  
Nicoletta Spampinato ◽  
Chaoyang Kuang ◽  
Xianjie Liu ◽  
...  
Keyword(s):  
Thin Films ◽  
Conducting Polymer ◽  
Vapour Phase ◽  
Vertical Inhomogeneity

Vertical inhomogeneity found in vapour phase polymerized thin films of the conducting polymer PEDOT:Tos.

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