scholarly journals Quantitative tests of mixed crystal exciton theory. II. Energy denominator study of naphthalene 1B2u resonance pairs

1977 ◽  
Vol 66 (4) ◽  
pp. 1599-1604 ◽  
Author(s):  
Frederick W. Ochs ◽  
Raoul Kopelman
Author(s):  
Shuaihao Wang ◽  
Yuanyi Zhu ◽  
Xuejiao Sun ◽  
Shengli An ◽  
Jinlong Cui ◽  
...  

1977 ◽  
Vol 19 (3) ◽  
pp. 413-427 ◽  
Author(s):  
R. Kopelman ◽  
E.M. Monberg ◽  
F.W. Ochs

Author(s):  
Xue Bian ◽  
Yuntao Yu ◽  
Nana Hao ◽  
Wenyuan Wu

Abstract Titanium dioxide supports, which were prepared by roasting metatitanic acid under different conditions, were used to prepare a series of Ce–W–Ti catalysts. The structure and denitration properties of the catalyst were studied. The results showed that TiO2 had different crystal types (mixed crystal phases with different proportions of anatase and rutile) under different roasting conditions, and the denitration efficiency of mixed crystal was better than that of pure phase TiO2. Ce–W/200 °C-1 hTiO2 catalyst exhibited a prominent NO conversion rate, and it can reach higher than 90% at a temperature range from 250 to 500°C. The large specific surface area, low content of rutile TiO2 in the support, high content of chemical adsorbed oxygen and high surface acidity were favorable to denitration performance of Ce–W–Ti catalyst.


1974 ◽  
Vol 29 (2) ◽  
pp. 290-294 ◽  
Author(s):  
Frederick W. Ochs ◽  
Paras N. Prasad ◽  
Raoul Kopelman
Keyword(s):  

1944 ◽  
Vol 65 (5-6) ◽  
pp. 204-205 ◽  
Author(s):  
R. Eisenschitz
Keyword(s):  

Author(s):  
S. V. Evans ◽  
V. C. Yee ◽  
M. Garcia-Garibay ◽  
J. Trotter
Keyword(s):  

The excited electronic states of dilute mixed crystals are discussed in terms of the theory of intermolecular interactions in dipole-dipole approximation. Resonance interactions of the Davydov type, which are of the first importance in pure crystals, are absent. However, interactions between host and guest molecules are generally of com parable importance to second-order interactions in pure crystals, and lead to similar changes in absolute absorption intensities and polarization ratios. There is a substantial departure from oriented-gas behaviour, which can be regarded as only a rough approximation to mixed crystal properties.


2016 ◽  
Vol 55 ◽  
pp. 33-37 ◽  
Author(s):  
Xiaowen Chen ◽  
Honghao Xu ◽  
Wenjuan Han ◽  
Lisha Wang ◽  
Junhai Liu ◽  
...  

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