Humidity-triggered single-crystal-to-single-crystal structural transformations in a Zn(ii) coordination polymer displaying unusual activation energy change in proton conductivity

2019 ◽  
Vol 55 (65) ◽  
pp. 9713-9716 ◽  
Author(s):  
Jeong Hwa Song ◽  
Dae Won Kim ◽  
Dong Won Kang ◽  
Woo Ram Lee ◽  
Chang Seop Hong
Keyword(s):  
Activation Energy ◽  
Coordination Polymer ◽  
Single Crystal ◽  
Proton Conductivity ◽  
Structural Transformations ◽  
Proton Conduction ◽  
Energy Change ◽  
Crystal Structural

Sequential single crystal-to-single crystal transformations occur in a Zn(ii)-based coordination polymer, revealing an unusual change in the activation energy for proton conduction.

Purely inorganic frameworks based on polyoxometalate clusters with abundant phosphate groups: single-crystal to single-crystal structural transformation and remarkable proton conduction

2020 ◽  
Vol 56 (3) ◽  
pp. 391-394 ◽  
Author(s):  
Shan Zhang ◽  
Ying Lu ◽  
Xiu-Wei Sun ◽  
Zhuo Li ◽  
Tian-Yi Dang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Proton Conductivity ◽  
Structural Transformation ◽  
Proton Conduction ◽  
High Proton Conductivity ◽  
High Proton ◽  
Crystal Structural ◽  
Inorganic Framework ◽  
Phosphate Groups ◽  
New Framework

A pure-inorganic framework 1 underwent a SCSC transformation to form a new framework 1′, which has high proton conductivity.

Solid-state dynamics and single-crystal to single-crystal structural transformations in octakis(3-chloropropyl)octasilsesquioxane and octavinyloctasilsesquioxane

2017 ◽  
Vol 19 (40) ◽  
pp. 27516-27529 ◽  
Author(s):  
A. Kowalewska ◽  
M. Nowacka ◽  
M. Włodarska ◽  
B. Zgardzińska ◽  
R. Zaleski ◽  
...  
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Structural Transformations ◽  
Crystal Lattices ◽  
Thermally Induced ◽  
Crystal Structural

Thermally induced formation of symmetric crystal lattices in functional POSS proceeds via different mechanisms and results in unique reversible phenomena.

scholarly journals Modification of Structure and Magnetic Properties in Coordination Assemblies Based on [Cu(cyclam)]2+ and [W(CN)8]3−

Crystals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 45 ◽  
Author(s):  
Aleksandra Pacanowska ◽  
Mateusz Reczyński ◽  
Beata Nowicka
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymer ◽  
Single Crystal ◽  
Structural Transformation ◽  
Water Solution ◽  
Building Blocks ◽  
Alcohol Solution ◽  
Slow Diffusion ◽  
Crystal Structural ◽  
Water Alcohol

The 1D {[CuII(cyclam)]3[WV(CN)8]2.5H2O}n (1·5H2O) (cyclam = 1,4,8,11-tetraazacyclotetradecane) coordination polymer of ladder topology can be obtained in water-alcohol solution from [Cu(cyclam)]2+ and [W(CN)8]3− building blocks. Upon dehydration, 1·5H2O undergoes a single-crystal-to-single-crystal structural transformation to the anhydrous {[CuII(cyclam)]3[WV(CN)8]2}n (1) form, which retains the same topology, but is characterized by shorter Cu-W distances and significantly more bent CN-bridges. The deformation of the coordination skeleton is reflected in magnetic properties: the predominant intra-chain interactions change from ferromagnetic in 1·5H2O to antiferromagnetic in 1. The reaction between the same building blocks in water solution under slow diffusion conditions leads to the formation of a 0D {[CuII(cyclam)(H2O)]2[CuII(cyclam)][WV(CN)8]2}.3H2O pentanuclear assembly (2·3H2O).

scholarly journals Proton Conduction in a Single Crystal of a Phosphonato‐Sulfonate‐Based Coordination Polymer: Mechanistic Insight

ChemPhysChem ◽  
2020 ◽  
Vol 21 (7) ◽  
pp. 605-609 ◽  
Author(s):  
Ali Javed ◽  
Thorsten Wagner ◽  
Stephan Wöhlbrandt ◽  
Norbert Stock ◽  
Michael Tiemann
Keyword(s):  
Coordination Polymer ◽  
Single Crystal ◽  
Proton Conduction ◽  
Mechanistic Insight

Effect of the ammonium ion on proton conduction in porous ionic crystals based on Keggin-type silicododecatungstate

2018 ◽  
Vol 74 (11) ◽  
pp. 1289-1294 ◽  
Author(s):  
Satoru Miyazawa ◽  
Reina Hosono ◽  
Ryota Osuga ◽  
Junko Nomura Kondo ◽  
Sayaka Uchida
Keyword(s):  
Activation Energy ◽  
Proton Conductivity ◽  
Proton Conduction ◽  
Ammonium Ion ◽  
Simple Method ◽  
Practical Applications ◽  
Grotthuss Mechanism ◽  
High Proton ◽  
Negative Charge Density ◽  
And Function

Proton conduction in crystalline porous materials has received much attention from basic scientific research through to practical applications. Polyoxometalates (POMs) can efficiently transport protons because of their small superficial negative charge density. A simple method for enhancing proton conductivity is to introduce NH4 + into the crystal structure, because NH4 + can form hydrogen bonds and function as a proton carrier. According to these considerations, NH4 + was introduced into the porous structure of A 2[Cr3O(OOCH)6(etpy)3]2[α-SiW12O40]·nH2O (A = Li, Na, K and Cs; etpy = 4-ethylpyridine) (I-A+ ) via topotactic cation exchange. The resulting compound, diammonium tris(4-ethylpyridine)hexaformatooxidotrichromium α-silicododecatungstate hexahydrate, (NH4)2[Cr3(CHO2)6O(C7H9N)3]2[α-SiW12O40]·6H2O, showed high proton conductivity and low activation energy under high relative humidity (RH), suggesting that protons migrate efficiently via rearrangement of the hydrogen-bonding network formed by the NH4 + cations and the waters of crystallization (Grotthuss mechanism). The proton conductivity and activation energy greatly decreased and increased, respectively, with the decrease in RH, suggesting that protons migrate as NH4 + and/or H3O+ under low RH (vehicle mechanism).

Glass-phase coordination polymer displaying proton conductivity and guest-accessible porosity

2019 ◽  
Vol 55 (59) ◽  
pp. 8528-8531 ◽  
Author(s):  
Munehiro Inukai ◽  
Yusuke Nishiyama ◽  
Kayako Honjo ◽  
Chinmoy Das ◽  
Susumu Kitagawa ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Proton Conductivity ◽  
Glass Phase ◽  
Glassy State ◽  
Proton Conduction ◽  
Phase Coordination ◽  
Accessible Porosity

We synthesized the crystalline and glassy state of a coordination polymer displaying proton conduction and guest-accessible porosity.

New hybrid organic-zincophosphate frameworks: single-crystal-to-single-crystal structural transformation and remarkable thermal and chemical stabilities

2016 ◽  
Vol 45 (17) ◽  
pp. 7231-7234 ◽  
Author(s):  
Tsung-Yuan Chang ◽  
Zhao-Nan Yan ◽  
Chun-Chi Wang ◽  
Hsing-Chun Li ◽  
Hsiu-Mei Lin ◽  
...  
Keyword(s):  
Single Crystal ◽  
Structural Transformation ◽  
Structural Transformations ◽  
Metal Phosphates ◽  
Crystal Structural

This research is the first example of hybrid metal phosphates that undergo SCSC structural transformations and exhibit remarkable thermal and chemical stabilities.

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