Results 31 to 40 of about 3,914 (183)

From Static to Dynamic: Electron Density of HOMO at Biaryl Linkage Controls the Mechanism of Hole Delocalization [PDF]

open access: yes, 2018
In order to extend the physical length of hole delocalization in a molecular wire, chromophores of increasing size are often desired. However, the effect of size on the efficacy and mechanism of hole delocalization remains elusive.
Ivanov, Maxim V.   +2 more
core   +3 more sources

Exploring the Potential and Evaluating Hydrocarbon Degradation by Novel Antarctic Dietzia and Pusillimonas Isolates From a Pristine Environment. [PDF]

open access: yesEnviron Microbiol Rep
The Antarctic Dietzia and Pusillimonas isolates were tested for bioremediation applications. Genomic analyses revealed the potential to degrade complex organic compounds, potential virulence factors and resistance genes. Physiological assays showed a wide range of adaptation to abiotic factors and sensitivity to different groups of antibiotics ...
Krucoń T   +4 more
europepmc   +2 more sources

Benzenoid isomers with greatest and smallest Kekulé structure counts [PDF]

open access: yesJournal of the Serbian Chemical Society, 2006
In families of benzenoid isomers, the species with the greatest and smallest value of the Kekulé structure count (K) possess, respectively, the greatest and smallest thermodynamic stability and, respectively, the smallest and greates reactivity.
Gutman Ivan   +3 more
doaj   +3 more sources

On p-electron conjugation in the five-membered ring of fluoranthene-type benzenoid hydrocarbons [PDF]

open access: yesJournal of the Serbian Chemical Society, 2009
A fluoranthene-type benzenoid hydrocarbon (FTBH) is a polycyclic conjugated system obtained by joining two ordinary benzenoid hydrocarbons so as to form a five-membered ring.
IVAN GUTMAN, JELENA ĐURĐEVIĆ
doaj  

Annelated perylenes: benzenoid molecules violating the Kekulé-structure-based cyclic conjugation models [PDF]

open access: yesJournal of the Serbian Chemical Society, 2005
Several currently used models for assessing the extent of cyclic conjugation in benzenoid hydrocarbons, all based on Kekulé-type structural formulas, predict that there is no cyclic conjugation in the central, “empty”, ring of perylene and its annelated ...
IVAN GUTMAN   +4 more
doaj   +3 more sources

Decomposition theorem on matchable distributive lattices

open access: yes, 2010
A distributive lattice structure ${\mathbf M}(G)$ has been established on the set of perfect matchings of a plane bipartite graph $G$. We call a lattice {\em matchable distributive lattice} (simply MDL) if it is isomorphic to such a distributive lattice.
Birkhoff   +33 more
core   +1 more source

The optical spectrum of a large isolated polycyclic aromatic hydrocarbon: hexa-peri-hexabenzocoronene, C42H18

open access: yes, 2008
The first optical spectrum of an isolated polycyclic aromatic hydrocarbon large enough to survive the photophysical conditions of the interstellar medium is reported.
Damian L. Kokkin   +16 more
core   +1 more source

Why 1,2‑quinone derivatives are more stable than their 2,3‑analogues? [PDF]

open access: yes, 2015
In this work, we have studied the relative stability of 1,2- and 2,3-quinones. While 1,2-quinones have a closed-shell singlet ground state, the ground state for the studied 2,3-isomers is open-shell singlet, except for 2,3-naphthaquinone that has a ...
Dominikowska, Justyna   +6 more
core   +2 more sources

Iterative estimation of total π-electron energy [PDF]

open access: yesJournal of the Serbian Chemical Society, 2005
In this work, the lower and upper bounds for total π-electron energy (E) was studied. A method is presented, by means of which, starting with a lower bound EL and an upper bound EU for E, a sequence of auxiliary quantities E0 E1, E2,… is computed, such ...
Türker Lemi, Gutman Ivan
doaj   +1 more source

Near omni-conductors and insulators: Alternant hydrocarbons in the SSP model of ballistic conduction [PDF]

open access: yes, 2017
Within the source-and-sink-potential model, a complete characterisation is obtained for the conduction behaviour of alternant π-conjugated hydrocarbons (conjugated hydrocarbons without odd cycles).
Borg, M.   +4 more
core   +1 more source

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