In Situ FTIR Spectroscopic Study of the Conformational Change of Isotactic Polypropylene during the Crystallization Process

2001 ◽  
Vol 105 (50) ◽  
pp. 12461-12463 ◽  
Author(s):  
Xinyuan Zhu ◽  
Deyue Yan ◽  
Yapeng Fang
Keyword(s):  
Spectroscopic Study ◽  
Conformational Change ◽  
Isotactic Polypropylene ◽  
Crystallization Process ◽  
In Situ Ftir

In situ FTIR spectroscopic study of the CO2methanation mechanism on Ni/Ce0.5Zr0.5O2

2014 ◽  
Vol 4 (2) ◽  
pp. 502-509 ◽  
Author(s):  
Qiushi Pan ◽  
Jiaxi Peng ◽  
Sheng Wang ◽  
Shudong Wang
Keyword(s):  
Spectroscopic Study ◽  
In Situ Ftir

scholarly journals Coadsorption of Nitriles and Co On Cu-Zsm-5: An In Situ FTIR Spectroscopic Study

1996 ◽  
Vol 431 ◽  
Author(s):  
J. Szanyi ◽  
M. T. Paffett
Keyword(s):  
Carbon Monoxide ◽  
Dipole Moment ◽  
Spectroscopic Study ◽  
Cross Section ◽  
In Situ Ftir ◽  
A Value

AbstractThe coadsorption of acetonitrile (ACN) or deuterated acetonitrile (dACN) with CO at Cu-ZSM-5 reveals several interesting features concerning the partial valency of Cu. Specifically, CO binds at Cu+1 and Cu° centers (in the absence of preadsorbed ACN) and exhibits C-O stretching frequencies of 2157 cm−1 and 2112 cm−1, respectively. Carbon monoxide readily adsorbs at an ACN (or dACN) saturated Cu-ZSM-5 and exhibits a C-O stretch of 2122 cm−1, a value more consistent with a partially reduced Cu+1 center. Furthermore, the IR cross section for the CN stretch in a number of nitriles (ACN, dACN, and benzonitrile) coadsorbed with CO displays interesting effects attributed to rehybridization and changes in CN dipole moment.

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