Results 271 to 280 of about 311,819 (318)

Investigation of Molybdate Single Crystals with Light Cations

open access: yes, 2006
Mikhailin, V.   +7 more
core  

Single-Crystal-to-Single-Crystal Topochemical Polymerizations by Design

Accounts of Chemical Research, 2008
The polymerization of simple conjugated dienes has long been of interest: polydienes occur throughout Nature, and polyisoprene and its analogues form the basis of entire industries. In contrast, the polymers of similar small conjugated compounds, diacetylenes, trienes, and triacetylenes, are either unknown or laboratory curiosities.
Joseph W, Lauher   +2 more
openaire   +2 more sources

Photochemical Single-Crystal-To-Single-Crystal Dimerizations and Polymerizations

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 2001
Abstract Single-crystal-to-single-crystal reactions of a series of bifunctional styrylyl]pyrylium salts have been investigated using long wavelength irradiation conditions. The dimerization of the reactive olefins in the solid state was followed by X-ray crystallography.
Buchholz, V., Enkelmann, V.
openaire   +2 more sources

Single-crystal-to-single-crystal intercalation of a low-bandgap superatomic crystal

Nature Chemistry, 2017
The controlled introduction of impurities into the crystal lattice of solid-state compounds is a cornerstone of materials science. Intercalation, the insertion of guest atoms, ions or molecules between the atomic layers of a host structure, can produce novel electronic, magnetic and optical properties in many materials.
Evan S. O'Brien   +15 more
openaire   +2 more sources

Irreversible single-crystal to polycrystal and reversible single-crystal to single-crystal phase transformations in cyanurates

Acta Crystallographica Section B Structural Science, 2001
4,6-Dimethoxy-3-methyldihydrotriazine-2-one (1) undergoes a single-crystal to single-crystal reversible phase transformation at 319 K. The low-temperature phase crystallizes in monoclinic space group P21/n with two crystallographically independent molecules in the asymmetric unit.
M, Kaftory   +3 more
openaire   +2 more sources

Photochemical Single-Crystal-to-Single-Crystal Transformations

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 1998
Abstract Single-crystal-to-single-crystal reactions of a series of (E)-2,6-di-tert−butyl-4-[2-(4-methylphenyl)-ethenyl]pyrylium salts have been investigated using long wavelength irradiation conditions. The dimerization of the reactive olefins in the solid state was followed by X-ray crystallography.
Buchholz, V., Enkelmann, V.
openaire   +2 more sources

Single crystals of inulin

International Journal of Biological Macromolecules, 1996
Lamellar crystals of inulin were grown by crystallizing sharp fractions of low molecular weight inulin from dilute aqueous ethanol solutions. The crystals were analyzed using three-dimensional electron diffraction and X-ray powder diagrams. Two crystalline polymorphs were observed, depending on the hydration conditions: a hydrated form which indexed on
Andre, I.   +5 more
openaire   +2 more sources

Topochemical single-crystal-to-single-crystal photodimerization

Chemical Physics Letters, 1980
Abstract The topochemical and topotactic solid-state photodimerization of 2-benzyl-5-benzylidenecyclopentanone is shown to be single-crystal-to-single-crystal, with the cell parameters of the monomer and dimer being very nearly identical (the maximum change being a contraction of 0.7% along c).
Hachiro Nakanishi   +2 more
openaire   +1 more source

Single crystals of chitosan

International Journal of Biological Macromolecules, 1990
Lamellar single crystals of chitosan were prepared at 125 degrees C by adding ammonia to a low DP fraction of chitosan dissolved in water. The crystals gave sharp electron diffraction diagrams which could be indexed in an orthorhombic P2(1)2(1)2(1) unit cell with a = 8.07 A, b = 8.44 A, c = 10.34 A.
Cartier, N., Domard, A., Chanzy, H.
openaire   +2 more sources

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