Long-range solid-state ordering and high geometric distortions induced in phthalocyanines by small fluoroalkyl groups

2009 ◽  
pp. 1095-1097 ◽  
Author(s):  
Sergiu M. Gorun ◽  
Jerome W. Rathke ◽  
Michael J. Chen
Keyword(s):  
Solid State ◽  
Long Range ◽  
Geometric Distortions

Measurement of Long-Range Interatomic Distances by Solid-State Tritium-NMR Spectroscopy

2010 ◽  
Vol 132 (6) ◽  
pp. 1734-1735 ◽  
Author(s):  
Alexander K. L. Yuen ◽  
Olivier Lafon ◽  
Thibault Charpentier ◽  
Myriam Roy ◽  
Francine Brunet ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Long Range ◽  
Tritium Nmr ◽  
Interatomic Distances

Solid State Structure and Photoluminescence properties of poly(2,5-dialkoxy-p-phenyleneethynylene)s

1995 ◽  
Vol 413 ◽  
Author(s):  
Christoph Weder ◽  
Michael J. Wagner ◽  
Mark S. Wrighton
Keyword(s):  
Solid State ◽  
Long Range ◽  
Photophysical Properties ◽  
Significant Degree ◽  
Range Order ◽  
Quantum Yields ◽  
Side Chains ◽  
Long Range Order ◽  
Rigid Rod ◽  
Covalently Linked

ABSTRACTIn an effort to better understand the relationship between molecular structure and photophysical properties, we have prepared and investigated a series of novel poly(2,5-dialkoxy-p-phenyleneethynylene)s. Wide angle X-ray diffraction measurements show that the supramolecular structure can be easily and significantly influenced by the nature of substituents covalently linked to the rigid-rod polymer main chains. Polymers which have sterically hindered side chains are essentially amorphous, while those with only linear side chains can form lamellar structures with a significant degree of long-range order. High photoluminescence quantum yields, up to 0.86 in solution and 0.36 in the solid state, have been measured. While the solution quantum yields are independent of the functionalization, solid state quantum efficiencies were found to be related to the degree of long-range order in the samples. In samples with a high degree of long-range order, the close proximity of the coplanar oriented polymer backbones is assumed to lead to the formation of eximer complexes which provide non emissive decay channels and, hence, result in comparable low photoluminescence quantum yields. In samples that adopt only a small extent of long-range order, the rigid-rod conjugated polymer backbones behave as if they were ‘dissolved’ in a hydrocarbon solvent and consequently high quantum efficiencies are obtained. Preliminary results indicate the suitability of these polymers as the emitting layer in electroluminescent devices.

Quasicrystal-related mosaics with periodic lattices interlaid with aperiodic tiles

2020 ◽  
Vol 76 (2) ◽  
pp. 137-144
Author(s):  
Zhanbing He ◽  
Yihan Shen ◽  
Haikun Ma ◽  
Junliang Sun ◽  
Xiuliang Ma ◽  
...  
Keyword(s):  
Solid State ◽  
Long Range ◽  
Orientational Order ◽  
Translational Symmetry ◽  
Repeated Unit ◽  
Unit Cells ◽  
Potential Applications ◽  
New Type ◽  
Structural Blocks

Quasicrystals, which have long-range orientational order without translational symmetry, are incompatible with the theory of conventional crystals, which are characterized by periodic lattices and uniformly repeated unit cells. Reported here is a novel quasicrystal-related solid state observed in two Al–Cr–Fe–Si alloys, which can be described as a mosaic of aperiodically distributed unit tiles in translationally periodic structural blocks. This new type of material possesses the opposing features of both conventional crystals and quasicrystals, which might trigger wide interest in theory, experiments and the potential applications of this type of material.

scholarly journals Structural Proteins from Whelk Egg Capsule with Long Range Elasticity Associated with a Solid-State Phase Transition

2014 ◽  
Vol 15 (1) ◽  
pp. 30-42 ◽  
Author(s):  
S. Scott Wasko ◽  
Gavin Z. Tay ◽  
Andreas Schwaighofer ◽  
Christoph Nowak ◽  
J. Herbert Waite ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Long Range ◽  
Structural Proteins ◽  
Egg Capsule
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