نتایج جستجو برای: π stacking
تعداد نتایج: 44075 فیلتر نتایج به سال:
Intrinsically low electrical conductivity of organic semiconductors hinders their further development into practical electronic devices. Herein, we report on an efficient chemical self-doping to increase the conductivity through one-dimensional stacking arrangement of electron donor-acceptor (D-A) molecules. The D-A molecule employed was a 1-methylpiperidine-substituted perylene tetracarboxylic...
Chemical-vapor-deposited large-area graphene is employed as the coating of transparent substrates for the growth of the prototypical organic n-type semiconductor perfluoropentacene (PFP). The graphene coating is found to cause face-on growth of PFP in a yet unknown substrate-mediated polymorph, which is solved by combining grazing-incidence X-ray diffraction with theoretical structure modeling....
A chiral Lewis acid catalysed asymmetric [2+2] cycloaddition reaction of allenyl imide and alkenes was developed by Xiaohua Liu, Xiaoming Feng et al. in their Research Article (e202211596). This protocol provided a series axially cyclobutenes high yields with excellent enantioselectivities. stepwise mechanism proposed based on experimental studies DFT calculations, π–π stacking interactions wer...
Ionophore complexes of K(TCNQ˙ − )(TCNQ 0 ) n adopt a variety stacking motifs such as wave-like infinite TCNQ columns separated by K + -cryptates (left) and -π-dimerised cation slipped stacks (right).
In the title complex, [CuCl(2)(C(12)H(12)N(2)O)], the Cu(II) ion is coordinated in a distorted trigonal-bipyramidal environment. In the crystal structure, there is a weak π-π stacking inter-action between symmetry-related pyridine rings, with a centroid-to-centroid distance of 3.8134 (17) Å. In addition, there is relatively close contact between the pyridine ring π-system and a symmetry-related...
In the title compound, C(13)H(11)N(3), the benzotriazole ring system is essentially planar, with a maximum deviation of 0.0173 (18) Å, and forms a dihedral angle of 75.08 (8)Å with the phenyl ring. In the crystal, pairs of weak C-H⋯N hydrogen bonds form inversion dimers. In addition, there are weak C-H⋯π(arene) inter-actions and weak π-π stacking inter-actions, with a centroid-centroid distance...
In the title compound, C(15)H(11)BrO(4), the dihedral angle between the aromatic rings is 66.77 (8)°. In the crystal, O-H⋯O, C-H⋯Br and C-H⋯O hydrogen bonds link the mol-ecules, forming layers lying parallel to (101). The crystal packing is further consolidated by C-H⋯π inter-actions and π-π stacking inter-actions [centroid-centroid distance = 3.5476 (7) Å].
In the title compound, C(6)H(7)N(3)O(2), the dihedral angle between the nitro group and the pyridine ring is 15.5 (3)° and an intra-molecular N-H⋯O hydrogen bond occurs. In the crystal, inversion dimers linked by two N-H⋯N hydrogen bonds occur, resulting in R(2) (2)(8) rings. The packing is stabilized by aromatic π-π stacking [centroid-centroid distance = 3.5666 (15) Å] and a short N-O⋯π contac...
The mol-ecule of the title compound, C(19)H(14)Cl(2)O(2), has two benzene rings connected to a methyl-ene C atom, and the rings are aligned at 66.3 (1)°. Inter-molecular C-H⋯π and π-π stacking inter-actions are observed in the crystal structure, the centroid-centroid distances between parallel benzene rings being 3.7529 (12) and 3.6201 (12) Å, respectively.
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