Time-Dependent Ni2+-Ion Exchange in Zeolites Y (FAU, Si/Al = 1.56) and Their Single-Crystal Structures

2016 ◽  
Vol 120 (50) ◽  
pp. 28563-28574 ◽  
Author(s):  
Sung Man Seo ◽  
Dae Jun Moon ◽  
Jihyun An ◽  
Hae-Kwon Jeong ◽  
Woo Taik Lim
Keyword(s):  
Ion Exchange ◽  
Single Crystal ◽  
Crystal Structures ◽  
Time Dependent ◽  
Single Crystal Structures

scholarly journals The Effect of Co2+-Ion Exchange Time into Zeolite Y (FAU, Si/Al = 1.56): Their Single-Crystal Structures

2014 ◽  
Vol 35 (1) ◽  
pp. 243-249 ◽  
Author(s):  
Sung Man Seo ◽  
Hu Sik Kim ◽  
Dong Yong Chung ◽  
Jeong Min Suh ◽  
Woo Taik Lim
Keyword(s):  
Ion Exchange ◽  
Single Crystal ◽  
Crystal Structures ◽  
Zeolite Y ◽  
Exchange Time ◽  
Single Crystal Structures

scholarly journals Manipulating the Conformation of 3,2′:6′,3″-Terpyridine in [Cu2(μ-OAc)4(3,2′:6′,3″-tpy)]n 1D-Polymers

Chemistry ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 182-198
Author(s):  
Dalila Rocco ◽  
Samantha Novak ◽  
Alessandro Prescimone ◽  
Edwin C. Constable ◽  
Catherine E. Housecroft
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Metal Binding ◽  
Polymer Chains ◽  
X Ray Diffraction ◽  
Face To Face ◽  
Single Crystal Structures ◽  
Π Stacking ◽  
Metal Binding Domain ◽  
Packing Interactions

We report the preparation and characterization of 4′-([1,1′-biphenyl]-4-yl)-3,2′:6′,3″-terpyridine (1), 4′-(4′-fluoro-[1,1′-biphenyl]-4-yl)-3,2′:6′,3″-terpyridine (2), 4′-(4′-chloro-[1,1′-biphenyl]-4-yl)-3,2′:6′,3″-terpyridine (3), 4′-(4′-bromo-[1,1′-biphenyl]-4-yl)-3,2′:6′,3″-terpyridine (4), and 4′-(4′-methyl-[1,1′-biphenyl]-4-yl)-3,2′:6′,3″-terpyridine (5), and their reactions with copper(II) acetate. Single-crystal structures of the [Cu2(μ-OAc)4L]n 1D-coordination polymers with L = 1–5 have been determined, and powder X-ray diffraction confirms that the single crystal structures are representative of the bulk samples. [Cu2(μ-OAc)4(1)]n and [Cu2(μ-OAc)4(2)]n are isostructural, and zigzag polymer chains are present which engage in π-stacking interactions between [1,1′-biphenyl]pyridine units. 1D-chains nest into one another to give 2D-sheets; replacing the peripheral H in 1 by an F substituent in 2 has no effect on the solid-state structure, indicating that bifurcated contacts (H...H for 1 or H...F for 2) are only secondary packing interactions. Upon going from [Cu2(μ-OAc)4(1)]n and [Cu2(μ-OAc)4(2)]n to [Cu2(μ-OAc)4(3)]n, [Cu2(μ-OAc)4(4)]n, and [Cu2(μ-OAc)4(5)]n·nMeOH, the increased steric demands of the Cl, Br, or Me substituent induces a switch in the conformation of the 3,2′:6′,3″-tpy metal-binding domain, and a concomitant change in dominant packing interactions to py–py and py–biphenyl face-to-face π-stacking. The study underlines how the 3,2′:6′,3″-tpy domain can adapt to different steric demands of substituents through its conformational flexibility.

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