Results 141 to 150 of about 10,693 (226)

Crystal structure, Hirshfeld surface analysis and crystal voids of 4-nitrobenzo[c][1,2,5]selenadiazole

Acta Crystallographica Section E: Crystallographic Communications
The title molecule, C6H3N3O2Se, is almost planar. In the crystal, intermolecular C—H...O hydrogen bonds link the molecules into a network structure, enclosing R22(7) and R33(8) ring motifs, parallel to the bc plane.
Atash V. Gurbanov, Tuncer Hökelek, Gunay Z. Mammadova, Khudayar I. Hasanov, Tahir A. Javadzade, Alebel N. Belay   +5 more
doaj   +1 more source

S‐Adenosylmethionine (SAM) hydrolases counter increased SAM epimerisation in thermophilic archaea

The FEBS Journal, EarlyView.
S‐Adenosyl‐l‐methionine (SAM) is a vital enzyme cofactor. Epimerisation at the sulfonium centre of biologically active (SS,SCα)‐SAM is driven by heat, yielding biologically inactive (RS,SCα)‐SAM. Here, two novel archaeal SAM hydrolases from the thermophilic Sulfolobus acidocaldarius and the halophilic Haloferax volcanii are shown to cleave (RS,SCα)‐SAM.
Agnes Bartels, Michael K. F. Mohr, Phillip Nußbaum, Marie Joest, Bianca Wassmer, Laurent Rasquin, Sonja‐Verena Albers, Jennifer N. Andexer   +7 more
wiley   +1 more source

Computational Investigation about the Effects of Solvent Polarity and Chalcogen Element Electronegativity on ESIPT Behaviors for the Et₂N-Substituted Flavonoid

Molecules
Inspired by the outstanding nature of flavonoid derivatives in the fields of chemistry and medicine, in this work we mainly focus on exploring the photo-induced properties of the novel Et2N-substituted flavonoid (ENF) fluorophore theoretically ...
Tuo Chang, Fang Yang, Tangyan Chen
doaj   +1 more source

Introduction and Extension of the Unified Theory of Multicenter Bonding: The Role of the Charge-Shift Bonding

Molecules
Classical chemical bonding is typically categorized into primary, strong interactions, such as covalent, ionic, and metallic bonds, and secondary, weak interactions, such as van der Waals forces, the hydrogen bond, and their likes (halogen bond ...
Francisco Javier Manjón, Hussien H. Osman, Álvaro Lobato, Fernando Izquierdo-Ruiz, Enrico Bandiello, Samuel Gallego-Parra, Ángel Vegas, Matteo Savastano, Alfonso Muñoz   +8 more
doaj   +1 more source

Backbone double‐mutant cycle analysis quantifies hydrogen‐bond energies in proteins

Protein Science, Volume 35, Issue 6, June 2026.
Abstract Protein structure is stabilized by a variety of noncovalent interactions, but many remain incompletely understood. For example, several potentially ubiquitous interactions involving the protein backbone have been identified, but challenges in determining reliable experimental energies have prevented their integration into structural models. To
Haoliang Zheng, Robert W. Newberry
wiley   +1 more source

Unveiling σ- and π-hole interactions in COSe-XCN (X = F, Cl, Br, and I): Theoretical insights into halogen substitution effects

Results in Chemistry
XCN molecules (X = F, Cl, Br, I) are linear pseudohalogen species containing a reactive and toxic cyanide group. Their high electrophilicity and toxicity limit experimental studies.
Mohammadmehdi Moradkhani, Yunes Abbasi Tyula, Yosra Moradkhani   +2 more
doaj   +1 more source

Detection of Toxic Gases and Volatile Organic Compounds Using Highly Adsorptive Nanomaterials: A Comprehensive Assessment

EcoMat, Volume 8, Issue 5, May 2026.
This review highlights how nanomaterials with high adsorption capacities including carbon‐based structures, transition metal oxides, 2D layers, and zeolites enable sensitive and selective detection of toxic gases and VOCs. Their tailored properties and sensing mechanisms drive the development of next‐generation gas sensors for environmental and ...
Hamdy A. Ismail, Sabbah Ataya, Mohamed M. Goda, Ahmed G. Hussein, Ahmed Ramah, Ahmad G. Ramadan, Rashid Khan, Joy Djuansjah, Swellam W. Sharshir, Ahmed El‐Harairy   +9 more
wiley   +1 more source

Addition Reactions of Phosphorus‐Centered Radicals Onto Olefins: Interplay Between Stability and Reactivity

Chemistry – A European Journal, Volume 32, Issue 16, 25 April 2026.
The energetics of the addition reaction of P‐centered radicals onto alkenes are primarily ruled by the stability of the attacking radical, as outlined by the computational screening of a wide range of reactions. In addition, donor‐acceptor substituents at the olefin have an important tuning role.
Meng Yang, Julianna Oláh, Zoltán Benkő   +2 more
wiley   +1 more source

Carbon-chalcogen bond formation initiated by [Al(NON^Dipp)(E)]^- anions containing Al-E{16} (E{16} = S, Se) multiple bonds. [PDF]

Chem Sci, 2022
Evans MJ, Anker MD, McMullin CL, Neale SE, Rajabi NA, Coles MP.   +5 more
europepmc   +1 more source

Double Chalcogen Bonding Recognition Arrays in Solution

Chemistry – A European Journal
AbstractN‐substituted pyridino‐based congeners of Ebselen, named here as Pyrselen, incorporating proximal Se and N atoms, undergo dimerization in solution and the solid state through a dual donor‐acceptor arrangement of chalcogen bonding sites. Dimerization constants were measured within the 5–50 M−1 range.
Romito, Deborah, Kählig, Hanspeter, Tecilla, Paolo, Sosso, Gabriele C., Bonifazi, Davide   +4 more
openaire   +4 more sources