The third-order NLO properties of A–D–A molecules originally derived from organic photovoltaic (OPV) devices are studied. results show that performance planar molecule (O-IDTBR) is better than twisted (IDFBR) in solution or film state.

A graph G is almost 4-connected if it is simple, 3-connected, has at least ve vertices, and V (G) cannot be partitioned into three sets A;B;C in such a way that jCj = 3, jAj 2, jBj 2, and no edge of G has one end in A and the other end in B. A graph K is a subdivision of a graph G if K is obtained from G by replacing its edges by internally disjoint nonzero length paths with the same ends, call...

Polycyclic groups are natural generalizations of cyclic groups but with more complicated algorithmic properties. They are finitely presented and the word, conjugacy, and isomorphism decision problems are all solvable in these groups. Moreover, the non-virtually nilpotent ones exhibit an exponential growth rate. These properties make them suitable for use in group-based cryptography, which was p...

A thorough material characterization of 1,7-diazaperylene via multiple investigation techniques (cyclic voltammetry, photoluminescence, photoluminescence excitation, impedance spectroscopy) was performed to understand its applicability in organic electronic devices. The recorded data this perylene derivative placed conjunction with the respective parent molecule, and behavior novel compound dev...

Let $R$ be a commutative ring with identity and $M$ be an unitary $R$-module. The intersection graph of an $R$-module $M$, denoted by $Gamma(M)$, is a simple graph whose vertices are all non-trivial submodules of $M$ and two distinct vertices $N_1$ and $N_2$ are adjacent if and only if $N_1cap N_2neq 0$. In this article, we investigate the concept of a planar intersection graph and maximal subm...

The molecular and electronic structure of dysprosium triiodide, DyI(3), and its dimer, Dy(2)I(6), was determined by high level computations, gas-phase electron diffraction, and gas-phase infrared and matrix-isolation infrared and Raman spectroscopy. The free monomeric molecule is planar from all methods with an equilibrium bond length of 2.808(9) A; the thermal average bond length from electron...

The asymmetric unit of the title compound, C(19)H(12)N(4)O·H(2)O, contains one organic molecule and one solvent water mol-ecule, which are connected by N-H⋯O and O-H⋯N hydrogen bonds. In addition, there is one intra-molecular O-H⋯N hydrogen bond. The organic mol-ecule is essentially planar (r.m.s. deviation for all non-H atoms = 0.028 Å).

The title compound, C(11)H(12)ClN(3)O(2), is essentially planar except for the n-but-oxy group [r.m.s. deviation from the least-squares plane = 0.0131 (1) Å for 11 non-H atoms]. An intra-molecular N-H⋯O inter-action results in the formation of an S(6) ring. The n-butoxy chain in the molecule is disordered over two sets of sites of equal occupancy.