Results 11 to 20 of about 53,726 (221)

Synthesis of hetero-bifunctional, end-capped oligo-EDOT derivatives [PDF]

open access: yes, 2016
Conjugated oligomers of 3,4-ethylenedioxythiophene (EDOT) are attractive materials for tissue engineering applications, and as model systems for studying the properties of the widely used polymer PEDOT.
Armgarth, A   +5 more
core   +4 more sources

Effect of benzocyclobutadieno-annelation on cyclic conjugation in perylene

open access: yesMacedonian Journal of Chemistry and Chemical Engineering, 2011
Earlier studies showed that the intensity of cyclic conjugation in the central ring R of perylene can be significantly altered by means of benzo-annelation. In particular, linear (resp. angular) benzoannelation was found to decrease (resp.
Ivan Gutman, Beba Stojanovska
doaj   +1 more source

Modular nuclearity: A generally covariant perspective [PDF]

open access: yes, 2015
A quantum field theory in its algebraic description may admit many irregular states. So far, selection criteria to distinguish physically reasonable states have been restricted to free fields (Hadamard condition) or to flat spacetimes (e.g.
Lechner, Gandalf, Sanders, Ko
core   +3 more sources

Why is phenanthrene more stable than anthracene?

open access: yesMacedonian Journal of Chemistry and Chemical Engineering, 2007
By means of a recently developed molecular-orbital-based method it is possible to estimate the energy effects of individual cycles, as well as pairs, triplets, etc. of cycles in polycyclic conjugated molecules.
Ivan Gutman, Sonja Stanković
doaj   +1 more source

Topological Defect Lines and Renormalization Group Flows in Two Dimensions [PDF]

open access: yes, 2019
We consider topological defect lines (TDLs) in two-dimensional conformal field theories. Generalizing and encompassing both global symmetries and Verlinde lines, TDLs together with their attached defect operators provide models of fusion categories ...
Chang, Chi-Ming   +4 more
core   +3 more sources

An Analogue of the Kac-Wakimoto Formula and Black Hole Conditional Entropy [PDF]

open access: yes, 1996
A local formula for the dimension of a superselection sector in Quantum Field Theory is obtained as vacuum expectation value of the exponential of the proper Hamiltonian. In the particular case of a chiral conformal theory, this provides a local analogue
Longo, Roberto
core   +3 more sources

Phenyl-cyclopentadienyl rule

open access: yesMacedonian Journal of Chemistry and Chemical Engineering, 2012
Within a systematic study of cyclic conjugation in the benzo-annelated derivatives of acenaphthylene and fluoranthene, a general regularity was discovered, named phenyl-cyclopentadienyl rule (PCP rule).
Jelena Đurđević, Ivan Gutman
doaj   +1 more source

How does aromaticity rule the thermodynamic stability of hydroporphyrins? [PDF]

open access: yes, 2011
Several measures of aromaticity including energetic, magnetic, and electron density criteria are employed to show how aromatic stabilization can explain the stability sequence of hydroporphyrins, ranging from porphin to octahydroporphin, and their ...
Bultinck, Patrick   +5 more
core   +2 more sources

Benzobisoxazole cruciforms: a tunable, cross-conjugated platform for the generation of deep blue OLED materials [PDF]

open access: yes, 2016
Four new cross-conjugated small molecules based on a central benzo[1,2-d:4,5-d′]bisoxazole moiety possessing semi-independently tunable HOMO and LUMO levels were synthesized and the properties of these materials were evaluated experimentally and ...
Cai, Min   +9 more
core   +1 more source

Cyclic conjugation in benzo-annelated triphenylenes [PDF]

open access: yesJournal of the Serbian Chemical Society, 2010
Cyclic conjugation in benzo-annelated triphenylenes was studied by means of the energy effect (ef) and the π-electron content (EC) of the six-membered rings.
SLAVKO RADENKOVIĆ   +2 more
doaj  

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