Experimental Determination of the Geometrical Relation between Monomer and Polymer Species of 2,5-Distyrylpyrazine Single Crystal in the Topotactic Photoinduced Polymerization Reaction

2019 ◽  
Vol 52 (5) ◽  
pp. 2189-2202 ◽  
Author(s):  
Kohji Tashiro ◽  
Hiroko Yamamoto ◽  
Kunihisa Sugimoto ◽  
Tomohiko Takahama ◽  
Masaya Tanaka ◽  
...  
Keyword(s):  
Single Crystal ◽  
Experimental Determination ◽  
Polymerization Reaction ◽  
Geometrical Relation ◽  
Photoinduced Polymerization ◽  
Polymer Species

scholarly journals Experimental Determination of Scan-truncation Losses from Low-temperature (16 K) Single-crystal X-ray Measurements

1988 ◽  
Vol 41 (3) ◽  
pp. 503 ◽  
Author(s):  
Riccardo Destro
Keyword(s):  
Low Temperature ◽  
Single Crystal ◽  
Experimental Determination ◽  
Least Squares ◽  
Spectral Distribution ◽  
Experimental Measurements ◽  
Fourier Methods ◽  
X Ray ◽  
Least Squares Fitting

Model intensity profiles have been obtained for biscarbonyl[ 14]annulene by convoluting the Mo Ka spectral distribution with two functions derived from experimental measurements at 16(1) K, up to 26Mo = 110�, of a spherical crystal mounted on a four-circle diffractometer equipped with the Samson low-temperature apparatus. The process includes accurate measurement of the inherent background, treatment of the profiles by numerical Fourier methods, and least-squares fitting. Owing to the instrumental configuration of the diffractometer used in this investigation, the first step of the process has required a careful determination of the X dependence of the background, besides the usual 26 dependence. Truncation losses for the crystal under study, evaluated for several scan ranges, are far larger than usually assumed or predicted.

Experimental determination of equilibrium surface segregation in Pt-Ni single crystal alloys

1986 ◽  
Vol 178 (1-3) ◽  
pp. 888-896 ◽  
Author(s):  
L. De Temmerman ◽  
C. Creemers ◽  
H. Van Hove ◽  
A. Neyens ◽  
J.C. Bertolini ◽  
...  
Keyword(s):  
Single Crystal ◽  
Experimental Determination ◽  
Surface Segregation ◽  
Equilibrium Surface
Sign in / Sign up

Export Citation Format

Share Document