Disk Aromaticity of the Planar and Fluxional Anionic Boron Clusters B20−/2−

2012 ◽  
Vol 18 (15) ◽  
pp. 4510-4512 ◽  
Author(s):  
Truong Ba Tai ◽  
Arnout Ceulemans ◽  
Minh Tho Nguyen
Keyword(s):  
Boron Clusters

Carborane Guests for Cucurbit[7]uril Facilitate Strong Binding and on Demand Removal

2020 ◽  
Author(s):  
Anna Kataki-Anastasakou ◽  
Jonathan C. Axtell ◽  
Selena Hernandez ◽  
RafalM. Dziedzic ◽  
Gary J. Balaich ◽  
...  
Keyword(s):  
Free State ◽  
Stimuli Responsive ◽  
Additional Consideration ◽  
Boron Clusters ◽  
High Affinity ◽  
On Demand ◽  
Azide Anion ◽  
Strong Binding

High affinity guest have been reported for the macrocyclic host cucurbit[7]uril (CB[7]), enabling widespread applications, but preventing CB[7] materials from being returned to their guest-free state for reuse. Here we present polyhedral boron clusters (carboranes) as strongly-binding, yet easily removable, guests for CB[7]. Aided by a Pd-catalyzed coupling of an azide anion, we prepared boron-functionalized 9<i>-</i>amino and 9-ammonium modified <i>ortho-</i>carboranes that bind to CB[7] with a <i>K<sub>a</sub></i>=10<sup>10</sup> M<sup>-1</sup>. Upon treatment with base, the <i>ortho</i>-carboranes<i> </i>readily undergo deboronation to yield anionic <i>nido</i>-carborane, a poor guest of CB[7], facilitating recovery of guest-free CB[7]. We showcase the utility of the modified <i>ortho</i>-carborane guest by recycling a CB[7]-functionalized resin. With this report, we introduce stimuli-responsive decomplexation as an additional consideration in the design of high affinity host-guest complexes.

scholarly journals An Overview on Anodes for Magnesium Batteries: Challenges towards a Promising Storage Solution for Renewables

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 810
Author(s):  
Federico Bella ◽  
Stefano De Luca ◽  
Lucia Fagiolari ◽  
Daniele Versaci ◽  
Julia Amici ◽  
...  
Keyword(s):  
Reduction Potential ◽  
Literature Analysis ◽  
Organic Electrolytes ◽  
Boron Clusters ◽  
Passivation Film ◽  
Metallic Magnesium ◽  
Passivation Layers ◽  
Magnesium Batteries ◽  
Nanostructured Metal Oxides ◽  
Nanostructured Metal

Magnesium-based batteries represent one of the successfully emerging electrochemical energy storage chemistries, mainly due to the high theoretical volumetric capacity of metallic magnesium (i.e., 3833 mAh cm−3 vs. 2046 mAh cm−3 for lithium), its low reduction potential (−2.37 V vs. SHE), abundance in the Earth’s crust (104 times higher than that of lithium) and dendrite-free behaviour when used as an anode during cycling. However, Mg deposition and dissolution processes in polar organic electrolytes lead to the formation of a passivation film bearing an insulating effect towards Mg2+ ions. Several strategies to overcome this drawback have been recently proposed, keeping as a main goal that of reducing the formation of such passivation layers and improving the magnesium-related kinetics. This manuscript offers a literature analysis on this topic, starting with a rapid overview on magnesium batteries as a feasible strategy for storing electricity coming from renewables, and then addressing the most relevant outcomes in the field of anodic materials (i.e., metallic magnesium, bismuth-, titanium- and tin-based electrodes, biphasic alloys, nanostructured metal oxides, boron clusters, graphene-based electrodes, etc.).

Density functional theory studies of boron clusters with exotic properties in bonding, aromaticity and reactivity

2021 ◽  
Author(s):  
Dongbo Zhao ◽  
Xin He ◽  
Meng Li ◽  
Bin Wang ◽  
Chunna Guo ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Atomic Clusters ◽  
Functional Theory ◽  
Boron Clusters ◽  
Size And Structure

Atomic clusters are unique in many perspectives because of their size and structure features and are continuously being applied for different purposes.

Structural Evolution of Boron Clusters on Ag(111) Surface‐from Atomic Chains to Triangular Sheet with Hexagonal Holes

ChemPhysChem ◽  
2021 ◽  
Author(s):  
Xiuyun Zhang ◽  
Yi Sun ◽  
Jingyi Tang ◽  
Tianxia Guo ◽  
Min Zhou ◽  
...  
Keyword(s):  
Structural Evolution ◽  
Boron Clusters ◽  
Atomic Chains

“Chemical Ligation”: A Versatile Method for Nucleoside Modification with Boron Clusters

2008 ◽  
Vol 14 (34) ◽  
pp. 10675-10682 ◽  
Author(s):  
Błazej A. Wojtczak ◽  
Agnieszka Andrysiak ◽  
Bohumír Grüner ◽  
Zbigniew J. Lesnikowski
Keyword(s):  
Chemical Ligation ◽  
Boron Clusters ◽  
Nucleoside Modification

scholarly journals Boron clusters as breast cancer therapeutics

2021 ◽  
pp. 111412
Author(s):  
N. Murphy ◽  
E. McCarthy ◽  
R. Dwyer ◽  
P. Farràs
Keyword(s):  
Breast Cancer ◽  
Cancer Therapeutics ◽  
Boron Clusters

A photoelectron spectroscopy and ab initio study of B21−: Negatively charged boron clusters continue to be planar at 21

2012 ◽  
Vol 136 (10) ◽  
pp. 104310 ◽  
Author(s):  
Zachary A. Piazza ◽  
Wei-Li Li ◽  
Constantin Romanescu ◽  
Alina P. Sergeeva ◽  
Lai-Sheng Wang ◽  
...  
Keyword(s):  
Ab Initio ◽  
Photoelectron Spectroscopy ◽  
Ab Initio Study ◽  
Boron Clusters

Silicon doped boron clusters: how to make stable ribbons?

2017 ◽  
Vol 19 (23) ◽  
pp. 14913-14918 ◽  
Author(s):  
Long Van Duong ◽  
Minh Tho Nguyen
Keyword(s):  
Boron Clusters ◽  
Silicon Doped

A doping of small boron clusters with silicon atoms leads to the formation of stable boron nanoribbon structures.

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