chemistry papers | Gist.Science

Determining the Molecular Weight of Polystyrene Through Ellipsometry of Spin-Cast Thin Polymer Films: A Multi-Technique Structural and Surface-Chemical Characterization Study

This study validates spin-cast ellipsometry as an accurate, low-cost method for determining the molecular weight of atactic polystyrene by correlating film thickness with solution concentration, while further confirming the polymer's structural and surface properties through complementary DSC, FTIR, and UV/ozone surface treatment analyses.

Alexa Q. Xiang, Alessandro Verona, Sahil Vora, Alina Wang, Andrew Wang, Camilie Wang, Lucas Wang, William Wang, Max Wein (…)2026-07-13

📄 chemistry

A Novel Method for Determining Phase-Specific Microhardness from Non-targeted Automated Testing of Fine-grained Multiphase Structures

This paper proposes a novel experimental-simulation methodology that utilizes non-targeted microhardness measurements and virtual testing to accurately determine intrinsic phase-specific microhardness in fine-grained multiphase alloys by analyzing the statistical relationship between indentation size and grain morphology.

S. Lekakh, O. Neroslavsky, M. Buchely2026-07-13

📄 chemistry

HPLC-DAD Profiling and Molecular Docking Insights into Lantana camara L. Flower Extract from Northwestern Algeria: Verbascoside and Luteolin as Potent Inhibitors of Human Pancreatic α-Amylase.

This study identifies Luteolin, a rigid flavone abundant in *Lantana camara* flowers from Northwestern Algeria, as a superior inhibitor of human pancreatic α-amylase compared to the more flexible Verbascoside and acarbose, due to its ability to overcome entropic penalties and form precise interactions with the enzyme's catalytic triad.

Bachir Bourroubey, Boumediene Meddah2026-07-13

📄 chemistry

A generative framework for precise topology engineering of polymer networks

This paper introduces a generative framework that enables precise control over polymer network topology to systematically engineer mechanical properties like elasticity and fracture toughness, revealing that topological order serves as a distinct design variable independent of chemical composition and crosslink density.

Ahmet Yildirim, Akash Arora, Dongchan Ahn, Sinan Keten2026-07-13

📄 chemistry

Study on the Synergistic Inhibition Mechanism and Thermal Stability of a Composite Inhibitor (Aluminum Hydroxide–Ammonium DihydrogenPhosphate–Sodium Polyacrylate) for the Spontaneous Combustion of Long-Flamed Coal

This study elucidates the synergistic inhibition mechanism and enhanced thermal stability of a ternary composite inhibitor (aluminum hydroxide, ammonium dihydrogen phosphate, and sodium polyacrylate) for long-flamed coal, demonstrating that the optimal 5:1:1 formulation significantly suppresses spontaneous combustion by physically insulating the coal, chemically passivating active sites, and sealing micro-cracks to reduce exothermic heat and increase oxidation activation energy.

Chun Zhang, Xiancheng Ning2026-07-13

📄 chemistry

Density and molar volume of CaO–SiO2–FeO melts measured by electrostatic levitation aboard the International Space Station

Using the Electrostatic Levitation Furnace aboard the International Space Station, researchers measured the densities and molar volumes of CaO–SiO2–FeO melts under microgravity, revealing that density increases with FeO content while molar volume generally aligns with additive-model predictions despite slight deviations at higher FeO concentrations.

Yusaku Seimiya, Masahito Watanabe, Takehiko Ishikawa, Chihiro Koyama, Yuki Watanabe2026-07-11✓ Author reviewed ⓘ

📄 chemistry

Tuning Structural, Magnetic, and Photocatalytic Properties of Erbium Orthoferrite Nanoparticles via co-substitution of Gd 3+ and Ti 4+

This study demonstrates that co-substituting ErFeO₃ nanoparticles with 5 mol% Gd³⁺ and Ti⁴⁺ optimizes their orthorhombic single-phase structure, mesoporous surface area, and magnetic properties, thereby enhancing their potential for gas sensing and photocatalytic applications.

Anusha Karumuri, Vani Arja, Kumara Raja Kandula, Tinku Baidya2026-07-10

📄 chemistry

The Salting-Out Effect Enables Electrochemical Selective 1,2-Diazidation of Conjugated and Simple Olefins by Aryl Iodine Catalysis

This paper reports a highly selective, metal-free, electrochemical 1,2-diazidation of diverse olefins catalyzed by aryl iodides, which leverages a salting-out effect induced by K₃PO₄ to create a biphasic system that facilitates efficient azide transport and reaction.

Yang'en You, Mingbao Zhang, Jinsong Zhang, Longji Li, Xu Wang2026-07-10

📄 chemistry

Clamp-like side-arm-functionalized calixarenes reinforce molecular cage confinement for damp-heat operationally durable perovskite photovoltaics

This study enhances the long-term damp-heat stability of high-efficiency perovskite solar cells by incorporating a clamp-like side-arm-functionalized calixarene derivative into the hole transport layer, which effectively confines lithium ions to prevent their migration and hydration-induced corrosion while achieving certified power conversion efficiencies of up to 27.14%.

Jiangzhao Chen, Bowen Li, Mingyu Wang, Haichao Yang, Kunyuan Zheng, Haiyun Li, Cheng Gong, Huān Bì, Danqing Ma, Siyu Wan (…)2026-07-10

📄 chemistry

Structure and Sequence Regulated Biodegradable and Chemically Recyclable Adhesives

This study reports a series of tunable, biodegradable, and chemically recyclable copolyester adhesives derived from sustainable monomers, which achieve robust adhesion strengths across diverse substrates through the rational manipulation of backbone stereodefects, side-chain hydrogen bonding, and segment sequence distribution.

Zhen Zhang, Beiwen Mo, Lin Zhu, Ze Xiao, Bixuan Wang, Ethan Quinn, Yan Cao2026-07-10

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