Comparing the ion affinity of two ionophores: Theoretical study of alkali earth metal ion–nano tubular cyclic peptide complexes

2016 ◽  
Vol 214 ◽  
pp. 101-110 ◽  
Author(s):  
Alireza Najafi Chermahini ◽  
Zahra Jafari Chermahini
Keyword(s):  
Metal Ion ◽  
Theoretical Study ◽  
Cyclic Peptide ◽  
Earth Metal ◽  
Alkali Earth Metal ◽  
Alkali Earth ◽  
Peptide Complexes

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.

The remarkable effect of alkali earth metal ion on the catalytic activity of OMS-2 for benzene oxidation

Chemosphere ◽  
2020 ◽  
Vol 250 ◽  
pp. 126211 ◽  
Author(s):  
Chunlan Ni ◽  
Jingtao Hou ◽  
Lei Li ◽  
Yuanzhi Li ◽  
Mingxia Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Ion ◽  
Earth Metal ◽  
Benzene Oxidation ◽  
Alkali Earth Metal ◽  
Remarkable Effect ◽  
Alkali Earth

Inquisitive Geometric Sites in h-BN Monolayer for Alkali Earth Metal Ion Batteries

2019 ◽  
Vol 123 (32) ◽  
pp. 19340-19346
Author(s):  
Shivam Kansara ◽  
Sanjeev K. Gupta ◽  
Yogesh Sonvane ◽  
Maja Varga Pajtler ◽  
Rajeev Ahuja
Keyword(s):  
Metal Ion ◽  
Earth Metal ◽  
Alkali Earth Metal ◽  
Alkali Earth
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