Polythioamides

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August undefined, 2024

WebNov 20, 2024 · In this work, six hyperbranched polythioamides with various topological structures, well-defined repeating units, satisfying yields (up to 99%), and high molecular … WebMar 8, 2024 · By using in-situ synthesis of polythioamide (PTA) on activated carbon (AC), a polythioamide-modified activated carbon-based adsorbent (AC-PTA) was successfully prepared and used to study the selective adsorption effect and mechanism of Au(Ⅲ) in wastewater. The results showed that AC-PTA exhibited ex …

Synthesis and characterization of novel poly(urethane-amide)s …

WebOct 15, 2024 · 2.3. Batch adsorption experiments. The adsorption properties of three bi-functional natural polymers (PDA-TFN-A, Chitosan-TFN-A and Cellulose-TFN-A) as adsorbents for Au (III) were studied from the influences of pH, temperature, ionic strength, initial Au (III) concentration and oscillation time, respectively. WebDifferent from traditional polyethylenimine (PEI) modified Hg(II) adsorbent materials, a novel hyperbranched polythioamide adsorbent (SPD) was prepared by using sulfur, PEI and 1,4-diethynylbenzene (DEB) as monomers.There are tens and thousands of tons of sulfur … the legacy apartments memphis tn

Structure–property relationships of aromatic polyamides and ...

WebJan 1, 1980 · Polythioamides (n.6) have cyclized chain-ends arising from reaction between an amino-group and the conjugated dithioester formed via the base-catalysed cyclization of tetrathioadipates. The importance of this secondary reaction can be reduced by low temperature operation, using a slight excess of dithioester over amine ( ca. 5%) and a … WebFeb 8, 2024 · Through the design of a pyridine-activated diyne monomer, the catalyst-free multicomponent polymerizations of sulfur, aromatic alkyne, and a group of commercially available primary and secondary diamines were realized at room temperature or 40 °C, affording functional polythioamides with well-defined structures, high yields (up to 98%), … WebMar 15, 2010 · The potential and feasibility of polythioamides as Hg(II) sorbents were evaluated. Powdered polythioamides quantitatively sorbed Hg(II) from an aqueous solution at pH 1-8. The sorption of Hg(II) on polythioamides obeyed the Langmuir adsorption isotherm; the sorption capacity was 0.70-0.85 g-Hgg(-1). … the legacy apartments melbourne fl

Functional Hyperbranched Polythioamides Synthesized from …

Structure–property relationships of aromatic polyamides and ...

WebThe aim of the present study was to design and synthesis a novel monomer to produce polyurethanes with improved thermal stability as well as good solubility. Herein, N1,N3-bis(5-hydroxynaphthalene-... WebJan 10, 2024 · Through the design of a pyridine-activated diyne monomer, the catalyst-free multicomponent polymerizations of sulfur, aromatic alkyne, and a group of commercially … the legacy apartments flWebApr 7, 2024 · Nonribosomal peptides (NRPs) are a vast class of natural products and an important source of therapeutics. Typically, these secondary metabolites are assembled by NRP synthetases (NRPSs) that function on substrates covalently linked to the enzyme by a thioester, in a process known as thiotemplated biosynthesis. the legacy apartments bay city mi

"WebThe two polythioamides were synthesized via the Willgerodt–Kinder type reaction according to Kanbara et al. 13 In Fig. 7, solution 13 C NMR spectra of PTA2T and PTA3T are compared with those of the model compounds, and the observed peaks are assigned as indicated. " - Polythioamides

Polythioamides

WebFeb 18, 2013 · Polythioamides were synthesized by the Willgerodt-Kindler polycondensation reaction using dialdehydes, 4,4′-trimethylenedipiperidine, and sulfur. WebOct 22, 2015 · The polyamides and polythioamides were actually synthesized and characterized in terms of solubility, molecular weight, crystallinity, thermal transition, and …

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WebDec 22, 2024 · The production of elemental sulfur from petroleum refining has created a technological opportunity to increase the valorization of elemental sulfur by the synthesis of high-performance sulfur-based plastics with improved optical, electrochemical, and mechanical properties aimed at applications in thermal imaging, energy storage, self … WebOct 1, 1998 · The polythioamides 6a–f structures are confirmed by 13 C n.m.r. shifts at ca. 196 ppm related to the thioamide functions. No dithioester thiocarbonyl signal (from some eventually remaining dithioester) could be observed near 228 ppm.All polythioamides show characteristic i.r. absorption for the thioamide group: ν (KBr) at 3210 and 1530 cm −1.

WebApr 11, 2024 · 1.Introduction. As homologues of polyamides (PAs), polythioamides (PTAs) have attracted increasing attention in functional polymers field due to their specific metal complexing capability [1], [2], high refractive index [3] and optical properties [4].Compared with the widely reported PAs, the research of PTAs is mainly limited by the inconvenience … WebNov 20, 2024 · In this work, six hyperbranched polythioamides with various topological structures, well-defined repeating units, satisfying yields (up to 99%), and high molecular …

WebT1 - Preparation of polythioamides and their metal adsorption properties. AU - Kanbara, Takaki. AU - Kagaya, Shigehiro. PY - 2006. Y1 - 2006. N2 - Willgerodt-Kindler type polycondensation of dialdehydes and diamines in the presence of sulfur afforded polythioamides. WebSulfur-containing polymers have renewed widespread attention due to their fascinating properties like high refractive index and semiconducting character. However, examples of …

WebApr 7, 2024 · Nonribosomal peptides (NRPs) are a vast class of natural products and an important source of therapeutics. Typically, these secondary metabolites are assembled …

WebOct 22, 2015 · The polyamides and polythioamides were actually synthesized and characterized in terms of solubility, molecular weight, crystallinity, thermal transition, and thermal stability. the legacy apartments penn stateWebOct 1, 1990 · Functional Hyperbranched Polythioamides Synthesized from Catalyst‐free Multicomponent Polymerization of Elemental Sulfur †. Chinese Journal of Chemistry … tianjin normal university agency numberWebNov 1, 2001 · These polythioamides can be applied in gold recovery which could extract trace amount of Au3+ from practical acidic leaching solution of discarded electronic waste selectively, rapidly (1 min ... tianjin northern groupWebPreparation of other polythioamides was carried out analogously. Preparation of Model Compound Model compound of PTA-1, 1,19-bis(benzthioyl)-4,49-tri-methylenedipiperidine … the legacy apartments state collegeWebSulfur-containing polymers have been widely studied because of their high refractivity and low dispersion, but the efficient synthetic approach of them is quite limited. In this work, … tianjin north glassWebThrough the design of a pyridine-activated diyne monomer, the catalyst-free multicomponent polymerizations of sulfur, aromatic alkyne, and a group of commercially available primary and secondary diamines were realized at room temperature or 40 °C, affording functional polythioamides with well-defined structures, high yields (up to 98%), high molecular … tianjin nts flourish tianjin north youji technology co. ltd