2024 Polythioamides

Polythioamides

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August undefined, 2024

WebMar 15, 2010 · 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-Hg g −1. Hg (II) was selectively separated from solutions containing 500 times larger amounts of Mn (II), Fe (III), Cu (II), … 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 …

Preparation of polythioamides from dialdehydes and 4,4â ²â ...

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 … WebSulfur-containing polymers have renewed widespread attention due to their fascinating properties like high refractive index and semiconducting character. However, examples of … edith austin obituary

Polymerizations with Elemental Sulfur: From Petroleum Refining …

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. 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 … 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. edith atwater photos

[Selective Adsorption of Au(Ⅲ) by Activated Carbon Supported

Polythioamides from multicomponent benzoxazine-isocyanide …

WebDec 16, 2024 · These polythioamides can be applied in gold recovery, which could extract a trace amount of Au 3+ from practical acidic leaching solution of discarded electronic … 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. conner strong \\u0026 buckelew companies incWebOct 22, 2015 · The polyamides and polythioamides were actually synthesized and characterized in terms of solubility, molecular weight, crystallinity, thermal transition, and … edith augustin

"WebObjectives: The spread of MDR bacteria represents a serious threat to human society and novel antibiotic drugs, preferably from new chemical classes, are urgently needed. Closthioamide was isolated from the strictly anaerobic bacterium Clostridium cellulolyticum and belongs to a new class of natural products, the polythioamides. " - Polythioamides

Polythioamides

WebOct 22, 2015 · The polyamides and polythioamides were actually synthesized and characterized in terms of solubility, molecular weight, crystallinity, thermal transition, and thermal stability. 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.

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WebMar 15, 2010 · Powdered polythioamides quantitatively sorbed Hg (II) from an aqueous solution at pH 1–8. The sorption of Hg (II) on polythioamides obeyed the Langmuir … WebFeb 18, 2013 · Polythioamides were synthesized by the Willgerodt-Kindler polycondensation reaction using dialdehydes, 4,4′-trimethylenedipiperidine, and sulfur.

WebThrough 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 … WebSulfur-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, …

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 … WebObjectives: The spread of MDR bacteria represents a serious threat to human society and novel antibiotic drugs, preferably from new chemical classes, are urgently needed. …

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 …

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 … edith auler grevenbroichWebMar 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). … edith ave baptist churchWebThe 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 … edith augustin poitiersWebSep 21, 2001 · Willgerodt–Kindler type reactions of dialdehydes and diamines in the presence of sulfur were investigated for preparation of polythioamides. The one-pot, three … edith aviles saavedraWebNov 1, 2001 · Willgerodt-Kindler type reactions of dialdehydes and diamines in the presence of sulfur were investigated for preparation of polythioamides. The one-pot, three … edith avila neyraWebOct 18, 2024 · Polythioamides of High Refractive Index by Direct Polymerization of Aliphatic Primary Diamines in the Presence of Elemental Sulfur Ziyang Sun † , Huahua Huang * † , Le Li ‡ , Lixin Liu † , and Yongming Chen * † edith austinWebNov 20, 2024 · In this work, six hyperbranched polythioamides with various topological structures, well-defined repeating units, satisfying yields (up to 99%), and high molecular … edith awounou