Results 31 to 40 of about 12,581 (214)

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

, 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, Goto, Gregory F. Metha, Jenniskens, Klaas Nauta, Le Page, Léger, Léger, Masakazu Nakajima, Nigel T. Lucas, Pino, Salama, Sloan, Thomas D. Varberg, Timothy W. Schmidt, Troy, Tyler P. Troy   +16 more
core   +1 more source

A test of Clar aromatic sextet theory [PDF]

Journal of the Serbian Chemical Society, 2013
The Clar aromatic sextet theory predicts that the intensity of cyclic conjugation in chevron-type benzenoid hydrocarbons monotonically decreases along the central chain. This regularity has been tested by means of several independent theoretical
Gutman Ivan, Radenković Slavko, Antić Marija, Đurđević Jelena   +3 more
doaj   +1 more source

Decomposition theorem on matchable distributive lattices

, 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, Cyvin, Cyvin, Felsner, Fournier, Grätzer, Khuller, Klavžar, Klavžar, Lam, Latapy, Lovász, Pretzel, Randić, Randić, Rémila, Rémila, Saldanha, Shiu, Stanley, Wilson, Zhang, Zhang, Zhang, Zhang, Zhang, Zhang, Zhang, Zhang, Zhang, Zhang, Zhang, Zhang, Zhang   +33 more
core   +1 more source

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

Journal 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  

A study about the Tutte polynomials of benzenoid chains

Topological Algebra and its Applications, 2017
The Tutte polynomials for signed graphs were introduced by Kauffman. In 2012, Fath-Tabar, Gholam-Rezaeı and Ashrafı presented a formula for computing Tutte polynomial of a benzenoid chain. From this point on, we have also calculated the Tutte polynomials
Sahin Abdulgani
doaj   +1 more source

Spectral studies of some hydroxy-derivatives of anthraquinones [PDF]

, 1970
The u.v., visible, and i.r. spectra of several hydroxy-anthraquinones are discussed and the bands are assigned. These bands are compared with those of anthracene and anthraquinone. The band at 207 nm.
El Ezaby, M. S., Issa, R., Salem, T. M., Zewail, A. H.   +3 more
core   +1 more source

On the zagreb polynomials of benzenoid systems

Open Physics, 2018
Topological indices play significant role in determining properties of chemical compound. Algebraic polynomials help to compute topological indices of studied chemical compounds.
Chel Kwun Young, Zahid Manzoor Ahmad, Nazeer Waqas, Ali Ashaq, Ahmad Maqbool, Kang Shin Min   +5 more
doaj   +1 more source

Wiener Index of Edge Thorny Graphs of Catacondensed Benzenoids

Mathematics, 2020
The Wiener index is a topological index of a molecular graph, defined as the sum of distances between all pairs of its vertices. Benzenoid graphs include molecular graphs of polycyclic aromatic hydrocarbons.
Andrey A. Dobrynin, Ali Iranmanesh
doaj   +1 more source

Topological mechanochemistry of graphene

, 2013
In view of a formal topology, two common terms, namely, connectivity and adjacency, determine the quality of C-C bonds of sp2 nanocarbons. The feature is the most sensitive point of the inherent topology of the species so that such external action as ...
A Hemmasizadeh, A Sakhaee-Pour, A Tobolski, AWK Jong de, C Jin, C Li, EA Nikitina, EF Sheka, EF Sheka, EF Sheka, EF Sheka, EF Sheka, EF Sheka, EF Sheka, F Guo, F Liu, G Lier Van, GMJ Schmidt, H Bu, J-L Tsai, JJP Stewart, K Hashemnia, K Kudin, K Tashiro, LR MacGillivray, M Hasegawa, M Topsakal, MJS Dewar, MM Shokrieh, NA Popova, RB Woodward, RE Merrifield, V Enkelmann, VD Khavryutchenko, VV Boldyrev, X Wei, Y Gao, Y Guo   +37 more
core   +1 more source

On some extended energy of graphs and their applications [PDF]

Yugoslav Journal of Operations Research
In this paper, we established a relation between the extended energy of graphs such as the first and second Zagreb energy, Randić energy, reciprocal Randić energy, and the atom-bond connectivity energy with some thermodynamic properties of benzenoid ...
Sarkar Prosanta, Dey Arindam, Kumar Shiv, Pal Anita   +3 more
doaj   +1 more source