The current open-loop practices employed to render paper substrates water- and oil-repellent for packaging non-packaging applications have generated ocean pollution placed daunting burdens on landfills.

Reported herein is the synthesis of biobased and sustainable chitosan-graft-castor oil (CHI-g-CO)copolymer that can be used for paper coating. CHI-g-CO was obtained via chemical grafting castor oil-capped isocyanate (CO-capped-NCO) onto a chitosan polymer backbone. The copolymer then employed as waterborne coating Kraft unbleached to render coated both water- oil-resistant. formulation CHI-g-CO-coated optimized by using response surface methodology. water resistances substrates were...

Abstract Herein, mono‐carboxy methylation of 4,4′‐Biphenol was accomplished to give ethyl 2‐((4′‐hydroxy‐[1,1′‐biphenyl]‐4‐yl)oxy)acetate ( EBPA ). The chemical structure determined using single crystal XRD and characterized by FT‐IR, UV‐Visible, 1 H‐NMR, EIMS elemental analysis. Additionally, computational studies were performed density functional theory (DFT) at M06‐2X/6‐311+G(d,p) B3LYP/6‐311+G(d,p) levels get optimized structures countercheck the experimental findings. Overall, DFT...

The glassy carbon electrode was fabricated with multifunctional bis-triazole-appended calix[4]arene and then used for the simultaneous detection of Zn(II), Pb(II), As(III), Hg(II). Before applying square-wave anodic stripping voltammetry, sensitivity precision modified assured by optimizing various conditions such as modifier concentration, pH solution, deposition potential, accumulation time, supporting electrolytes. found to be responsive up picomolar limits aforementioned heavy metal...

A highly sensitive and selective electrochemical sensor has been developed investigated for multiple metal ions detection. The GCE was modified with the synthesized multifunctional calix[4]arene anodic stripping voltammetry used simultaneous analysis of Cd2+, Pb2+ Hg2+ ions. conditions were optimized respect to modifier's loaded concentration, accumulation time, potential, supporting electrolyte pH media. bis(imidazo[4,5-f][1, 10]phenanthroline) appended bis-triazolo Calix[4] arene glassy...

The preparation of renewable polyesters with good barrier properties is highly desirable for the packaging industry. Herein we report synthesis high molecular weight via an innovative use in situ drying agent approach and films formed from these polyesters. High number average (Mn) semiaromatic (PEs) were synthesized alternating ring-opening copolymerization (ROCOP) phthalic anhydride (PA) cyclohexene oxide (CHO) using a salen chromium(III) complex presence 4-(dimethylamino)pyridine (DMAP)...

We have successfully developed a ‘turn-on’ colorimetric chemosensor for Fe3+ based on 1,10-phenanthroline. An amide derivative of 1,10-phenanthroline 4 was the selective recognition over Co2+, Cr3+, Cu2+, Mn2+, Ni2+, Ag+ and Zn2+ could measure concentration in range 15–210 μM by UV–vis spectroscopy. Moreover, addition to colourless solution turned its colour light pink, indicating that is capable detecting naked eye. Compound exhibits major absorption band centred at 268 which shifted 278 nm...

ABSTRACT Due to their good mechanical properties, high molecular weight polyesters (PEs) are highly desirable for a wide range of applications especially in the packaging industry. However, synthesis polymers by energy efficient methods is difficult. In this study, series semi‐aromatic PEs were synthesized via alternating ring‐opening copolymerization (ROCOP) phthalic anhydride (PA) and cyclohexene oxide (CHO) using salen chromium(III) complex as catalyst 4‐(dimethylamino)pyridine...

A flexible macrocycle 7 based on 1,2,3-triazole and biphenol was synthesized through click chemistry it contained propyl group. Click used to get by reacting diazide 4 diyne 6 in the presence of ascorbic acid. EI-MS showed molecular ion peak at 614.3 while ESI-MS 615.25 [M+H]+. 1H NMR proton -CH2- 2.26, 3.81 4.56 ppm a singlet observed 5.26 whi ch belonged methylene protons located between triazole ring phenol. The aromatic 8.17 biphenyl were 6.42 7.50 ppm. Crystallographic data 3 submitted...

The title compound, C(12)H(14)O(6), features a roughly planar mol-ecule (r.m.s. deviation for all non-H atoms = 0.287 Å). In the crystal, mol-ecules are held together by C-H⋯O hydrogen bonds.

The three independent mol-ecules of the title compound, C(15)H(14)O(4), have similar orientations their aromatic rings, dihedral angles between rings being 57.0 (1), 58.1 (1) and 58.2 (1)°. In each mol-ecule, hydr-oxy group forms an intra-molecular hydrogen bond to carbonyl O atom, forming S(10) ring motif.

A molecular “dugdugi” 8 derived from 1,10-phenanthroline was synthesized and characterized by using NMR, EIMS UV studies. Bisphenol alkylated with 1,3-dibromopropane reacted 4-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)phenol to obtain . 30 mmolL -1 solution of prepared in 10 % DMF ethanol stirred for min m L ethanolic solutions Co 2+ , Cr 3+ Cu Fe Mn Ni Ag + Zn Chemosensor switched-on the presence showing pink color while it remained turn-off other metals. The spectra showed a peak at 279...

4,4′-(1,3-Phenylenebis(oxy))dianiline 1 is an aromatic diamine compound and has been very less utilized in the organic synthesis. Different diimines diamides were synthesized by reacting with heterocyclic compounds having different functionalities. These longer electron rich spacer molecules to utilize them near future making macrocycles of sizes A hydrazide was also prepared from a diamide molecule containing ester group. nibrobenzene moiety further reduced amine obtain than starting .