Organic Crystals with Tunable Emission Colors Based on a Single Organic Molecule and Different Molecular Packing Structures

Imaging of organic crystals in the electron microscope is limited by their sensitivity to the electron beam, with even the most stable molecules only giving a resolution of ~3Å. By contrast, electron diffraction requires a lower beam intensity, and so can give much better resolution, down to ~lÅ under favourable conditions. Intensities may be measured directly from the diffraction pattern, and the phase determination problem can be surmounted by applying the maximum entropy method, which chooses phases by likelihood estimation.It was decided to apply this method to the organic molecule anthanthrene, C22H12 (fig. 1), since x-ray studies found that the crystals were monoclinic with a = 12.10Å, b = 10.34Å, c = 10.74Å, β = 92.2°, space group P21/a and Z = 4, but no details of the atomic co-ordinates were given in the literature. A previous study of the molecule, using KC1 as the substrate, produced epitaxial layers showing the acprojection being most common at room temperature.

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Tunable emission in dye-doped truxene-based organogels through RET

Journal of Materials Chemistry C ◽

10.1039/c5tc00706b ◽

2015 ◽

Vol 3 (22) ◽

pp. 5764-5768 ◽

Cited By ~ 5

Author(s):

Juan F. Galisteo-López ◽

Sandra Gómez-Esteban ◽

Berta Gómez-Lor ◽

Cefe López

Keyword(s):

Organic Molecule ◽

Organic System ◽

Tunable Emission

A novel organic system with tunable emission is demonstrated comprising a truxene-based organogel which resonantly transfers energy to a dopant organic molecule.

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Molecular packing in organic crystals

Journal of Polymer Science Part C Polymer Symposia ◽

10.1002/polc.5070290108 ◽

2007 ◽

Vol 29 (1) ◽

pp. 47-63 ◽

Cited By ~ 2

Author(s):

L. H. Jensen

Keyword(s):

Molecular Packing ◽

Organic Crystals

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A luminescent liquid crystal with multistimuli tunable emission colors based on different molecular packing structures

New Journal of Chemistry ◽

10.1039/c4nj00218k ◽

2014 ◽

Vol 38 (8) ◽

pp. 3429 ◽

Cited By ~ 35

Author(s):

Hongbo Lu ◽

Shanna Zhang ◽

Aixiang Ding ◽

Miao Yuan ◽

Guiyu Zhang ◽

...

Keyword(s):

Liquid Crystal ◽

Molecular Packing ◽

Tunable Emission

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Topology of molecular packings in organic crystals

Acta Crystallographica Section B Structural Science ◽

10.1107/s0108768100011824 ◽

2000 ◽

Vol 56 (6) ◽

pp. 1035-1045 ◽

Cited By ~ 74

Author(s):

E. V. Peresypkina ◽

V. A. Blatov

Keyword(s):

Crystal Structure ◽

Crystal Structures ◽

Organic Compounds ◽

Coordination Sphere ◽

Molecular Packing ◽

Organic Crystals ◽

Topological Properties ◽

Coordination Numbers ◽

Intermolecular Contacts ◽

Coordination Spheres

Using the methods of coordination sequences and of molecular Voronoi–Dirichlet polyhedra, the topological properties of molecular packings and molecular coordination numbers (MCNs) were determined in the crystal structures of 33 575 monosystem organic compounds within the first three coordination spheres. Numerous examples of disagreement between the topology of molecular packing and the system of intermolecular contacts in a crystal structure were found. It is concluded that within the first coordination sphere most of the molecules tend to arrange with MCN = 14, obeying the model of the thinnest covering of space, but molecular packings as a whole tend to be constructed according to one of the close packings.

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