Article
Multidisciplinary Sciences
Arafat Husain, Ahmad A. A. Adewunmi, Afeez Gbadamosi, Mamdouh A. A. Al-Harthi, Shirish Patil, Muhammad Shahzad Kamal
Summary: Efficient demulsifiers with varying viscosities were evaluated for their demulsification potential on asphaltene stabilized crude oil emulsions. The demulsifiers showed better performance at ambient conditions in demulsifying emulsions formed from distilled water, while the higher viscosity demulsifier achieved a lower water removal. Seawater hastened demulsification. In the presence of salts, the demulsifiers demonstrated excellent demulsification and the performance varied depending on the type of salt. Injection of demulsifiers reduced the viscosity and shear stress of the emulsion, with the highest reduction observed in the lower viscosity demulsifier. A demulsification mechanism was proposed based on the analysis of optical microscopic images.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Caitlin A. McCandler, Jakob C. Dahl, Kristin A. Persson
Summary: Nanoclusters are promising materials due to their large surface areas and unique electronic structures. This study investigates the influence of ligands on the stability, bonding, and electronic structure of phosphine-stabilized gold nanoclusters. The addition of phosphine affects the morphology and functionality of the nanoclusters, highlighting the importance of considering the ligand environment.
Article
Chemistry, Multidisciplinary
Oscar Suarez-Riano, Gabriel Mencia, Simon Tricard, Jerome Esvan, Pier-Francesco Fazzini, Bruno Chaudret, Edwin A. Baquero
Summary: In this study, a new NHC-stabilized water-soluble Pd/Ni system is presented, which can perform H/D exchange reactions in an enantiospecific manner without reducing the aromatic ring of phenylalanine and tyrosine due to a synergetic Pd-Ni effect.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Maria Frutos, Nasrina Parvin, Antoine Baceiredo, David Madec, Nathalie Saffon-Merceron, Vicenc Branchadell, Tsuyoshi Kato
Summary: A donor-stabilized silylene with a Ni-0-based donating ligand has been synthesized, showing a peculiar behavior due to the cooperative reactivity of Si and Ni centers. Calculations indicate that the orientation of the Ni-ligands with respect to the silylene moiety is crucial in determining the role of the Ni-fragment.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Eeva Heliovaara, Henri Liljeqvist, Mikko Muuronen, Aleksi Eronen, Karina Moslova, Timo Repo
Summary: The development of new, environmentally benign dissolution methods for metallic gold is driven by needs in the circular economy. A quantitative dissolution of gold in organic solution under mild conditions is achieved by using hydrogen peroxide as an oxidant and two thiol ligands working in a cooperative manner. This ligand-exchange mechanism allows to drastically reduce thiol consumption and may lead to more effective gold dissolution methods in the future.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Dorothy Priyanka Dorairaj, Jebiti Haribabu, Penki V. S. Shashankh, Yu-Lun Chang, Cesar Echeverria, Sodio C. N. Hsu, Ramasamy Karvembu
Summary: A series of Pd(II) complexes based on acylthiourea ligands were synthesized and characterized. Complex 4 exhibited good activity against cancer cells, inducing apoptosis. Furthermore, complex 4 showed high scavenging activity against free radicals and biocompatibility with red blood cells.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Liang Du, Neda Arabzadeh Nosratabad, Zhicheng Jin, Chengqi Zhang, Sisi Wang, Banghao Chen, Hedi Mattoussi
Summary: N-heterocyclic carbene (NHC)-modified ligands were tested for coordinating and stabilizing luminescent CdSe-ZnS core-shell quantum dots (QDs) in hydrophilic media. The coordination of NHC ligands onto QDs was found to be rapid and effective, leading to enhanced long-term colloidal stability and changes in optical and spectroscopic properties of the nanocrystals, including red-shift in absorption and fluorescence spectra and intensity changes under different storage conditions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Nicholas J. Van Zee, Amanda S. Peroutka, Adelyn Crabtree, Marc A. Hillmyer, Timothy P. Lodge
Summary: This study compared the effects of polymers with different hydrophobicity on cell membrane protection. It was found that although polymers with higher hydrophobicity showed stronger binding to liposomes, both types of polymers exhibited similar cell protection efficacy in the LDH assay. These results highlight the importance of considering additional factors when targeting enhanced membrane protection.
Article
Chemistry, Physical
Alexandre Porcheron, Omar Sadek, Salem Ba Sowid, Nathalie Bridonneau, Laura Hippolyte, Dimitri Mercier, Philippe Marcus, Lukmonjon Mutalliev, Clement Chauvier, Corinne Chaneac, Louis Fensterbank, Francois Ribot
Summary: Significant progress has been made in stabilizing and functionalizing gold nanoparticles (AuNPs) using thiols and imidazolylidene N-heterocyclic carbene-capping ligands. This study introduces mesoionic carbene (MIC) ligands based on the 1,2,3-triazol-5-ylidene scaffold, which enables the efficient preparation of highly stable AuNPs through a simple one-pot protocol. The size of the AuNPs can be controlled by adjusting the Au/ligand ratio and the nature of the triazolium salts, facilitated by the easy synthesis of MIC precursors through click chemistry. Characterization using C-13 solid-state NMR and X-ray photoelectron spectroscopy confirms the presence of MICs exclusively on the surface of Au(0) nanoparticles.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Garion E. J. Hicks, Rosemary R. Cranston, Victor Lotocki, Joseph G. Manion, Benoit H. Lessard, Dwight S. Seferos
Summary: This study presents a method of polymer assembly driven and stabilized by oxidative doping. The size and morphology of the oxidized polymer nanostructures can be controlled by the dopant mol % and addition temperature. The assembly is influenced by the polymer planarity, optical absorption, and doping level, which can be modulated through sequential dopant addition.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Roberto Vescovo, Maximilian Becker, Marta Maria Natile, Patrizia Canton, Claudio Evangelisti, Andrea Biffis
Summary: The method involves the sequential generation of noble metal nanoparticles and metal oxide phase inside a cross-linked polymer colloid, allowing independent tuning of their properties and amounts. The resulting composite colloids, when isolated by precipitation and subsequent calcination, exhibit noble metal nanoparticles dispersed on a crystalline, nanostructured oxide phase. Preliminary catalytic tests show promising catalytic performances, particularly in the case of gold, in the aerobic oxidation of alcohols.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Renee W. Y. Man, Hong Yi, Sami Malola, Shinjiro Takano, Tatsuya Tsukuda, Hannu Hakkinen, Masakazu Nambo, Cathleen M. Crudden
Summary: This study reports the first chiral Au-10 nanoclusters stabilized by chiral bis N-heterocyclic carbene (bisNHC) ligands and confirms their structure and properties. DFT calculations further reveal the electronic structure and optical characteristics, as well as chirality transfer, of this nanocluster.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Polymer Science
Lauren E. E. Ball, Gabriela Garbonova, Rueben Pfukwa, Bert Klumperman
Summary: Responsive triblock copolymers were synthesized and studied for their potential use in drug delivery systems in biomedical research.
Article
Chemistry, Multidisciplinary
Alexander Grasruck, Giorgio Parla, Lisha Lou, Jens Langer, Christian Neiss, Alberto Herrera, Sybille Friess, Andreas Goerling, Guenter Schmid, Romano Dorta
Summary: Cu(I)-Hydrido complexes stabilized by electrostatic interactions can react with CO2 at low temperature to form Cu(I)-formates.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Andrea Monti, Raquel J. Rama, Beatriz Gomez, Celia Maya, Eleuterio Alvarez, Ernesto Carmona, M. Carmen Nicasio
Summary: The study presented the synthesis and characterization of neutral and cationic N-methyl- and N-phenyl-2-aminobiphenyl methanesulfonate palladacycles stabilized with dialkylterphenyl phosphines. By selecting different phosphine ligands, different coordination modes and structures of complexes were obtained. The most efficient precatalyst, [Pd(N-methyl-2-aminobiphenyl)L4](OMs), was identified for facilitating the coupling of aryl chlorides with secondary and primary amines and indoles.
INORGANICA CHIMICA ACTA
(2021)