Uniaxial negative thermal expansion induced by moiety twisting in an organic crystal

CrystEngComm ◽  
2018 ◽  
Vol 20 (35) ◽  
pp. 5123-5126 ◽  
Author(s):  
Dinabandhu Das ◽  
Leonard J. Barbour
Keyword(s):  
Thermal Expansion ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Variable Temperature ◽  
Negative Thermal Expansion ◽  
X Ray Diffraction ◽  
X Ray ◽  
Anomalous Thermal Expansion ◽  
Increasing Temperature ◽  
Packing Analysis

Anomalous thermal expansion of a new diyn-diol molecule was studied by means of variable-temperature single-crystal X-ray diffraction. Analysis of the unit cell axes as a function of temperature shows that the material experiences uniaxial negative thermal expansion. Packing analysis of the crystal structures reveals twisting of the cyclopentyl moiety relative to the diyne spine with increasing temperature.

Variable-Temperature Microcrystal X-ray Diffraction Studies of Negative Thermal Expansion in the Pure Silica Zeolite IFR

2001 ◽  
Vol 123 (23) ◽  
pp. 5453-5459 ◽  
Author(s):  
Luis A. Villaescusa ◽  
Philip Lightfoot ◽  
Simon J. Teat ◽  
Russell E. Morris
Keyword(s):  
Thermal Expansion ◽  
Variable Temperature ◽  
Negative Thermal Expansion ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pure Silica

scholarly journals Negative thermal expansion and electronic structure variation of chalcopyrite type LiGaTe2

RSC Advances ◽  
2018 ◽  
Vol 8 (18) ◽  
pp. 9946-9955 ◽  
Author(s):  
V. V. Atuchin ◽  
Fei Liang ◽  
S. Grazhdannikov ◽  
L. I. Isaenko ◽  
P. G. Krinitsin ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Electronic Structure ◽  
Diffraction Analysis ◽  
First Principles ◽  
Cell Parameter ◽  
Negative Thermal Expansion ◽  
First Principles Calculations ◽  
X Ray Diffraction ◽  
Structure Variation ◽  
X Ray

The LiGaTe2 crystals were grown by the Bridgman–Stockbarger technique and the cell parameter dependence on temperature in the range of 303–563 K was evaluated by the X-ray diffraction analysis and first principles calculations.

scholarly journals Reversible switching between positive and negative thermal expansion in a metal–organic framework DUT-49

2020 ◽  
Vol 8 (39) ◽  
pp. 20420-20428
Author(s):  
Bikash Garai ◽  
Volodymyr Bon ◽  
Anastasia Efimova ◽  
Martin Gerlach ◽  
Irena Senkovska ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Single Crystal ◽  
Metal Organic Framework ◽  
Negative Thermal Expansion ◽  
X Ray Diffraction ◽  
Guest Molecules ◽  
X Ray ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
Organic Framework

Reversible switching between positive and negative thermal expansion of a mesoporous metal-organic framework DUT-49 has been demonstrated and studied by synchrotron single-crystal X-ray diffraction with different guest molecules in the pores.

Synthesis of 4-(3-coumarinyl)-3-benzyl-4-thiazolin-2-one 4-methylbenzylidenehydrazone and determination of the isomeric structure by X-ray analysis

2003 ◽  
Vol 218 (12) ◽  
Author(s):  
Süheyla Özbey ◽  
Nilgün Karalı ◽  
Aysel Gürsoy
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Spectral Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Isomeric Structure ◽  
Elemental Analyses

AbstractIn this study 4-(3-coumarinyl)-3-benzyl-4-thi azolin-2-one 4-methylbenzylidenehydrazone 3 was synthesised. An independent proof of the thiazolylhydrazone structure of 3 was achieved by single crystal X-ray diffraction analysis. Elemental analyses and spectral data (IR,

Single-crystal X-ray diffraction analysis of nonplanar autoepitaxial silicon layers

2009 ◽  
Vol 45 (14) ◽  
pp. 1610-1613
Author(s):  
V. T. Bublik ◽  
L. V. Kozhitov ◽  
T. T. Kondratenko
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
X Ray

Functionalized triphenylphosphine oxide-based manganese(II) complexes for luminescent printing

2021 ◽  
Author(s):  
Xiaomeng Huang ◽  
Yanyan Qin ◽  
Pengfei She ◽  
Haixing Meng ◽  
Shu-Juan Liu ◽  
...  
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Triphenylphosphine Oxide ◽  
X Ray Diffraction ◽  
X Ray

Three novel neutral manganese(II) complexes (TPhPONMe2)2MnBr2, (TPhPOOMe)2MnBr2, and (TPhPOCF3)2MnBr2 have been designed and synthesized based on functionalized Ph3PO ligand. These structures are clarified by single crystal X-ray diffraction analysis, which...

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