Erratum to “Novel Facial Conducting Polyamide-Based Dithiophenylidene Cyclyhexanone Moiety Utilized for Selective Cu²⁺ Sensing”

Abstract

The present work is aimed to synthesize a novel series of linear polyamides (PAs) 4 a-d based on di (thiazolyl-thiophenylidene)cyclyhexanone as well as carries aliphatic and aromatic species in the polymer main backbones. The polymerization process was occurred by solution polycondensation technique by the interaction of the newly synthesized monomer 3 with adepoyl, sebacoyl, terphthaloyl, and isophthaloyldiacid chlorides. Before polymerization, the structure of monomer 3 was confirmed by elemental and spectral analyses. The structures of polymers were also investigated by elemental, spectral analysis, thermal analysis, and Field-Emission Scanning Electron Microscopy (FE-SEM) micrographs. Film draw temperatures for all the polymers were evaluated in the range 509.0-542.3°C. Here, the heavy metallic sensors are developed with the polyamide-fabricated glassy carbon electrode (GCE) by reliable current vs. voltage technique. A thin layer of PA onto GCE was fabricated with conducting coating agents (5% nafion) to fabricate a selective heavy metal ions, Cu 2þ sensor in short response time in phosphate buffer phase. The fabricated sensor was also exhibited higher sensitivity, lower detection limit, large dynamic concentration ranges, long-term stability, and improved electrochemical performances toward Cu 2þ sensor. The calibration plot is linear (r 2 : 0.9956) over the large Cu 2þ ion concentration ranges (1.0 nM to 10.0 mM). The sensitivity and detection limit is 3.4177 µA cm −2 µM −1 and 0.36 nM (signal-to-noise ratio of 3) respectively. This novel effort is initiated a well-organized way of efficient cationic sensor improvement with conductive polymers for heavy metallic pollutants in environmental and health-care fields in large scales. GRAPHICAL ABSTRACT

Biologically active sulfur-containing polyamides as promising anticancer materials

“…The initial degradation temperature (IDT) is identified as the temperature at which degradation occurs 31 , 32 ] [ 30 ]. The value of initial decomposition of the new polyamides occurs before T 10 values, and the degradation step does not start before ⁓230 ◦ C, this confirm that they were thermally stable even at high temperatures [ 1 ] according to the following order PA 1 < PA 2 < PA 3 < PA 4 . The final decomposition temperature (FDT) is the temperature at which any possible deterioration is virtually comprehensive [ 26 , 32 , 33 ].…”

“…The latter step related to pyrolytic oxidation of carbon, carbon double bonds that separate from numerous bonds with the elimination of free shorter chains depend on the structure of these polymers and creation of char as end products [ 1 , 14 ]. The decomposition of this step occur more rapidly than the first one.…”

“…Polyamides are an essential category of polymers that have an amide bond (NH-C=O) along the polymer chain. They are produced by the reaction of diamine monomers with diacid chlorides, and hydrochloric acid is the byproduct [ 1 ]. Polyamides are known as high-performance materials in the fields of industry, electronics, and aerospace applications, referring to their amazing chemical, thermal, and mechanical resistance [ 1 ] [ 2–4 ].…”

“…They are produced by the reaction of diamine monomers with diacid chlorides, and hydrochloric acid is the byproduct [ 1 ]. Polyamides are known as high-performance materials in the fields of industry, electronics, and aerospace applications, referring to their amazing chemical, thermal, and mechanical resistance [ 1 ] [ 2–4 ]. Nevertheless, one of the disadvantages of polyamides is that they usually present limited solubility in most organic solvents, making them difficult or expensive to utilize in many applications.…”

“…In addition, the synthesis of a polyamide-based dithiophenylidene cyclohexanone moiety was reported by Hussein MA. These new polyamides were further used as candidates for healthcare and environmental fields [ 1 ].…”