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In this article, we reported a new poly(diacetylenes)-based sensor (PDA-IBA) for silver ion detection and reduction through the chelation of imidazole moiety. The poly(diacetylenes) polymer functionalized with imidazole groups. As the concentration of silver ions in the solution increased, the PDA surface underwent oxidation concurrently with the reduction of silver ions was demonstrated through imidazole receptor. This chemical reaction resulted in a noticeable change in the color of the solution, shifting from blue to dark red. The limit of detection (LOD) was determined to be 0.034 mM. Zeta potential data analysis and electrochemical measurements further confirmed the PDA-IBA was capable to reduce Ag+ into Ag0. Moreover, the silver species produced were validated through inductively coupled plasma optical emission spectrometry (ICP-OES). Additionally, the color change observed in PDA-IBA as a response to silver ions was effectively demonstrated by integrating it into a paper-based sensor. This study introduces an innovative and promising approach for enhancing the capabilities of chemosensors in detecting and reducing Ag+. [Display omitted] • A highly sensitive and selective Ag + sensor, poly(diacetylenes)-based chemosensor PDA-IBA was synthesized. • The PDA-IBA polymer displayed a color change in the presence of Ag + through a chemical reduction process. • The silver ion's reduction was demonstrated by zeta potential data analysis and ICP-OES. [ABSTRACT FROM AUTHOR]

The modification of Scots pine sapwood (Pinus sylvestris L.) with the heterocyclic compounds imidazole and succinimide was investigated. Pressure-impregnation with aqueous solutions containing imidazole, imidazole + citric acid, succinimide, succinimide + citric acid, and citric acid + sorbitol (CIOL®) with solid contents of 5%, 10%, and 15% was followed by oven-curing at 220 °C for 1 h. During the treatment steps, the changes in mass, bending properties, and anti-swelling efficiency (ASE) were examined. The results indicate that solid concentrations within the range of 5% to 10% were optimal. The results seem to show that there are two differing mechanisms in the modification of imidazole and succinimide, respectively. Mass loss due to heat treatment was highest in the imidazole-treated specimens, whereas it remained low and concentration-independent in the succinimide-treated specimens. After three cycles, the ASE reached 31% for the imidazole-treated specimens and improved to 38% with the addition of citric acid. For succinimide, the ASE increased from 17% to 41%. The bending properties generally showed improvement, except for succinimide + citric acid and CIOL®, which displayed a reduced modulus of rupture. Chemical analyses are warranted to fully understand the reaction mechanisms of these treatments. The positive effects of imidazole treatment are suggested to stem from a thermal reaction between the chemical and the wood, indicated by substantial mass loss during leaching and specimen darkening. Succinimide and citric acid might exhibit polymerization with each other and with wood components, which is akin to the CIOL® process. Further research should delve into the reaction mechanisms and the impact of imidazole and succinimide on biological durability. [ABSTRACT FROM AUTHOR]

Fused-imidazoles, Groebke-Blackburn-Bienaymé (GBB) reaction, Isocyanide Chemistry, Multicomponent reactions, [2.2]Paracyclophane Cover Feature: Diversity-Oriented Synthesis of [2.2]Paracyclophane-derived Fused Imidazo[1,2-a]heterocycles by Groebke-Blackburn-Bienaymé Reaction: Accessing Cyclophanyl Imidazole Ligands Library (Chem. Eur. J. 3/2022) Keywords: Fused-imidazoles; Groebke-Blackburn-Bienaymé (GBB) reaction; Isocyanide Chemistry; Multicomponent reactions; [2.2]Paracyclophane EN Fused-imidazoles Groebke-Blackburn-Bienaymé (GBB) reaction Isocyanide Chemistry Multicomponent reactions [2.2]Paracyclophane 1 1 1 01/18/22 20220113 NES 220113 B The Groebke-Blackburn-Bienaymé three-component reaction b (GBB-3CR) has contributed enormously to the progress of organic synthesis, medicinal chemistry, and materials science. [Extracted from the article]