scholarly journals Alkali (Alkali Earth) Metal Ions with 2-(3'-Hydroxy-2'-pyridyl)benzoxazole Cation-π Complexes and Its Intramolecular Proton Transfer Process: A Theoretical Investigation

2012 ◽  
Vol 70 (12) ◽  
pp. 1347
Author(s):  
Pinggui Yi ◽  
Zhengjun Liu ◽  
Zhaoxu Wang ◽  
Bo Hou ◽  
Xianyong Yu ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Metal Ions ◽  
Theoretical Investigation ◽  
Transfer Process ◽  
Earth Metal ◽  
Intramolecular Proton Transfer ◽  
Alkali Earth Metal ◽  
Alkali Earth ◽  
Proton Transfer Process

scholarly journals SBA-15 with Crystalline Walls Produced via Thermal Treatment with the Alkali and Alkali Earth Metal Ions

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5270
Author(s):  
Sung Soo Park ◽  
Sang-Wook Chu ◽  
Liyi Shi ◽  
Shuai Yuan ◽  
Chang-Sik Ha
Keyword(s):  
Metal Ions ◽  
Pore Size ◽  
Metal Ion ◽  
Pore Diameter ◽  
Earth Metal ◽  
Silica Matrix ◽  
Alkali Earth Metal ◽  
Alkali Earth ◽  
Large Pore ◽  
Large Pore Size

Crystalline walled SBA-15 with large pore size were prepared using alkali and alkali earth metal ions (Na+, Li+, K+ and Ca2+). For this work, the ratios of alkali metal ions (Si/metal ion) ranged from 2.1 to 80, while the temperatures tested ranged from 500 to 700 °C. The SBA-15 prepared with Si/Na+ ratios ranging from 2.1 to 40 at 700 °C exhibited both cristobalite and quartz SiO2 structures in pore walls. When the Na+ amount increased (i.e., Si/Na increased from 80 to 40), the pore size was increased remarkably but the surface area and pore volume of the metal ion-based SBA-15 were decreased. When the SBA-15 prepared with Li+, K+ and Ca2+ ions (Si/metal ion = 40) was thermally treated at 700 °C, the crystalline SiO2 of quartz structure with large pore diameter (i.e., 802.5 Å) was observed for Ca+2 ion-based SBA-15, while no crystalline SiO2 structures were observed in pore walls for both the K+ and Li+ ions treated SBA-15. The crystalline SiO2 structures may be formed by the rearrangement of silica matrix when alkali or alkali earth metal ions are inserted into silica matrix at elevated temperature.

Organic Lasers Harnessing Excited State Intramolecular Proton Transfer Process

ACS Photonics ◽  
2020 ◽  
Vol 7 (6) ◽  
pp. 1355-1366
Author(s):  
Chang-Cun Yan ◽  
Xue-Dong Wang ◽  
Liang-Sheng Liao
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Transfer Process ◽  
Intramolecular Proton Transfer ◽  
Proton Transfer Process
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