Results 51 to 60 of about 2,216 (186)
Twist and Shine: The Impact of Halogen Substitution on Thiele Hydrocarbon's Optical Properties
Angewandte Chemie, Volume 138, Issue 6, 2 February 2026.Halogenation in Thiele hydrocarbons strongly influences structure and excited‐state dynamics. Depending on substitution, “boat” folded forms show large Stokes shifts and strong solvatochromism, while planar “butterfly” derivatives exhibit near‐unity photoluminescence yields.
Angela Punzi +11 more
wiley +2 more sources
Extraordinary Redox Activities in Ladder-Type Conjugated Molecules Enabled by B ← N Coordination-Promoted Delocalization and Hyperconjugation. [PDF]
, 2018 The introduction of B ← N coordinate bond-isoelectronic to C-C single bond-into π-systems represents a promising strategy to impart exotic redox and electrochromic properties into conjugated organic molecules and macromolecules. To achieve both reductive
Barker, Kayla P +8 more
core +7 more sources
Advanced Materials, EarlyView.The seminal transformation of a 2D‐COF (SURFCOF‐IMDEA1) into a 2D porous COF (SURFCOF‐IMDEA2) on Au(111) by a sequential C‐C coupling and ladderization triggered by thermal annealing steps at increasing temperatures is reported. Abstract The development of covalent organic frameworks (COFs) is currently a primary objective in materials science, taking ...
Ana Barragán +11 more
wiley +1 more source
Aromaticity and Antiaromaticity: How to Define Them
ChemistryAromaticity and antiaromaticity are concepts that are often used to explain and predict the physical and chemical properties of cyclic conjugated compounds.
Marija Baranac-Stojanović
doaj +1 more source
Evaluation of the aromatic character of some bowl shape polycyclic carbon nanostructures [PDF]
شیمی کاربردی روز, 2017 In two recent decades, nucleus independent chemical shift (NICS) criterion was used to gauge the amount of aromaticity of organic and inorganic compounds in a lot of publications.
Adel Reisi-Vanani, fatemeh hajizadeh
doaj +1 more source
Synthesis of 3,4-Bis(benzylidene)cyclobutenes [PDF]
, 2011 The syntheses of several derivatives of 3,4-bis(benzylidene)cyclobutene are reported. Previously unknown 1,2-dibromo-3,4-bis(benzylidene)cyclobutene was obtained through in situ generation of 1,6-diphenyl-3,4-dibromo-1,2,4,5-tetraene followed by ...
Parkhurst, Rebecca Rosenberg +1 more
core +1 more source
Advanced Electronic Materials, EarlyView.The use of air stable but thermally labile molecules provides an efficient strategy for the N‐type doping of organic semiconductors with relatively low electron affinities. Design criteria for efficient dopants should also take into account diffusion and phase segregation that cannot be decoupled from thermally activated doping.
Francesca Pallini +15 more
wiley +1 more source
A QCT View of the Interplay between Hydrogen Bonds and Aromaticity in Small CHON Derivatives
Molecules, 2022 The somewhat elusive concept of aromaticity plays an undeniable role in the chemical narrative, often being considered the principal cause of the unusual properties and stability exhibited by certain π skeletons. More recently, the concept of aromaticity
Miguel Gallegos +4 more
doaj +1 more source
Chemistry – A European Journal, EarlyView.ABSTRACT Molecules that violate Hund's rule by exhibiting an inverted singlet–triplet gap (STG), where the first excited singlet (S1${\rm S}_1$) lies below the triplet (T1${\rm T}_1$), are rare but hold great promise as efficient fifth‐generation light emitters.
Atreyee Majumdar +1 more
wiley +1 more source
Contemplation on some cyclic N8 isomers-A DFT treatment
Defence Technology, 2018 Various cyclic N8 isomers are considered at the levels of B3LYP/6–311++G(d,p) and B3LYP/cPVTZ. Some energies and molecular orbital properties are obtained. The structures are found to be stable in the singlet state but mostly unstable in the triplet. The
Lemi Türker
doaj +1 more source