Results 51 to 60 of about 5,564 (213)

Infinite benzenoids

open access: yesThe Art of Discrete and Applied Mathematics, 2019
Summary: A family of benzenoids, called convex benzenoids, was introduced in 2012 by \textit{R. Cruz} et al. [MATCH Commun. Math. Comput. Chem. 68, No. 1, 97--108 (2012; Zbl 1313.05065)]. In a later paper by the present author et al., several equivalent characterisations of convex benzenoids have been given and their equivalence was proved.
openaire   +3 more sources

Edge Metric and Fault-Tolerant Edge Metric Dimension of Hollow Coronoid

open access: yesMathematics, 2021
Geometric arrangements of hexagons into six sides of benzenoids are known as coronoid systems. They are organic chemical structures by definition. Hollow coronoids are divided into two types: primitive and catacondensed coronoids.
Ali N. A. Koam   +3 more
doaj   +1 more source

5,12‐TIPS‐Substitution of Tetracene: Effects on Redox Potentials and Cyclic Voltammetric Behavior in CH2Cl2 and THF1

open access: yesChemistry – A European Journal, EarlyView.
Tetracene and bis(tri(isopropyl)silylethynyl)tetracene (TIPS‐tetracene) exhibit characteristic similarities and differences in their electrochemical redox behavior depending on the base solvent of the electrolyte. Analysis of cyclic voltammograms allows the quantification of substituent and solvent effects and the calculation of an “electrochemical gap.
Holger F. Bettinger   +2 more
wiley   +1 more source

Floral Scent Variation in the Heterostylous Species Gelsemium sempervirens

open access: yesMolecules, 2019
Gelsemium sempervirens (L.) W.T. Aiton, a distylous woody vine of the family Gelsemiaceae, produces sweetly fragrant flowers that are known for the toxic alkaloids they contain.
Bettie Obi Johnson   +4 more
doaj   +1 more source

A comparison of collision cross section values obtained via travelling wave ion mobility-mass spectrometry and ultra high performance liquid chromatography-ion mobility-mass spectrometry : application to the characterisation of metabolites in rat urine [PDF]

open access: yes, 2019
A comprehensive Collision Cross Section (CCS) library was obtained via Travelling Wave Ion Guide mobility measurements through direct infusion (DI). The library consists of CCS and Mass Spectral (MS) data in negative and positive ElectroSpray Ionisation (
Bouwmeester, Robbin   +15 more
core   +2 more sources

Benzo[cd]azulenyl: A Structural Isomer of Phenalenyl—Synthesis and Properties of Its Tri‐tert‐butyl‐substituted Derivative and Formation of a Thermal‐ and Photoresponsive σ‐Dimer

open access: yesChemistry – A European Journal, EarlyView.
Benzo[cd]azulenyl, a nonalternant isomer of phenalenyl, is identified as a new member of the nonalternant hydrocarbon radical family. The tri‐tert‐butyl substituted derivative forms a stable σ‐dimer in the solid state. Upon exposure to external stimuli such as light and heat, the σ‐bond of the dimer dissociates, producing the monomeric radical.
Kaho Takeuchi   +2 more
wiley   +1 more source

Chemical characterization and enological potential of less frequent red grape Uruguayan varieties by study secondary metabolites

open access: yesBIO Web of Conferences, 2019
Study of secondary grape metabolites, such as polyphenol compounds (anthocyanins, flavonols, flavan-3-ols), volatile compounds present in grapes in both free and glycoside forms (monoterpenols, norisoprenoids, benzenoids), allowed us to characterize ...
Boido E.   +7 more
doaj   +1 more source

Design of Small Intramolecular Singlet Fission Chromophore: An Azaborine Candidate and General Small Size Effects [PDF]

open access: yes, 2016
We report the first attempt to design small intramolecular singlet fission chromophores, with the aid of quantum chemistry and explicitly simulating the time evolution of state populations using quantum dynamics method.
Goel, Prateek, Zeng, Tao
core   +1 more source

Unraveling Synergistic Regulation Mechanism in Nitrogen/Sulfur Co‐Doped Biomass‐Derived Hard Carbon Toward Durable Sodium‐Ion Battery Anodes

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Nitrogen/sulfur co‐doping optimizes the electron and spatial structure of biomass‐derived hard carbon, and the anode demonstrates superior long‐term cycling stability over 2000 cycles, validating an improved “adsorption‐intercalation‐pore filling” mechanism.
Qian Long   +8 more
wiley   +1 more source

Chemical Constituents from the Stems of Diospyros maritima

open access: yesMolecules, 2009
A new phenolic, bis(6-hydroxy-2,3,4-trimethoxylphen-1-yl)methane (1) and a new butanedioate, butylmethyl succinate (2), along with twenty-nine known compounds including one naphthoquinone derivative, two chromanones, eight benzenoids, one lignan, one ...
Yueh-Hsiung Kuo   +4 more
doaj   +1 more source

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