Controlling water structure and behavior: design principles from metal organic nanotubular materials

CrystEngComm ◽  
2020 ◽  
Vol 22 (20) ◽  
pp. 3406-3418
Author(s):  
Lindsey C. Applegate ◽  
Tori Z. Forbes
Keyword(s):  
Structural Changes ◽  
Water Structure ◽  
Design Principles ◽  
Metal Organic ◽  
Behavior Design ◽  
Organic Nanotubes ◽  
And Behavior

Water exhibits unique and unexpected behavioral and structural changes when confined to the nanoscale, notably within the pores of metal–organic nanotubes.

Tuning the Electric Field Response of MOFs by Rotatable Dipolar Linkers

2019 ◽  
Author(s):  
Johannes P. Dürholt ◽  
Babak Farhadi Jahromi ◽  
Rochus Schmid
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Structural Changes ◽  
Dielectric Behavior ◽  
Two Dimensions ◽  
Dielectric Constants ◽  
Electric Response ◽  
Dipole Strength ◽  
Metal Organic ◽  
Dynamics Simulations

Recently the possibility of using electric fields as a further stimulus to trigger structural changes in metal-organic frameworks (MOFs) has been investigated. In general, rotatable groups or other types of mechanical motion can be driven by electric fields. In this study we demonstrate how the electric response of MOFs can be tuned by adding rotatable dipolar linkers, generating a material that exhibits paralectric behavior in two dimensions and dielectric behavior in one dimension. The suitability of four different methods to compute the relative permittivity κ by means of molecular dynamics simulations was validated. The dependency of the permittivity on temperature T and dipole strength μ was determined. It was found that the herein investigated systems exhibit a high degree of tunability and substantially larger dielectric constants as expected for MOFs in general. The temperature dependency of κ obeys the Curie-Weiss law. In addition, the influence of dipolar linkers on the electric field induced breathing behavior was investigated. With increasing dipole moment, lower field strength are required to trigger the contraction. These investigations set the stage for an application of such systems as dielectric sensors, order-disorder ferroelectrics or any scenario where movable dipolar fragments respond to external electric fields.

The quest for hydrogen bond-based metal organic nanotubes (MONT)

2014 ◽  
Vol 67 (23-24) ◽  
pp. 3863-3872 ◽  
Author(s):  
Andrea Ienco ◽  
Maria Caporali ◽  
Ferdinando Costantino ◽  
Annalisa Guerri ◽  
Gabriele Manca ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Metal Organic ◽  
Organic Nanotubes

Folate-targeted single-wall metal-organic nanotubes used as multifunctional drug carriers

2017 ◽  
Vol 392 ◽  
pp. 189-195 ◽  
Author(s):  
Linyan Yang ◽  
Min Liu ◽  
Kebin Huang ◽  
Xia Ai ◽  
Cun Li ◽  
...  
Keyword(s):  
Drug Carriers ◽  
Metal Organic ◽  
Organic Nanotubes

scholarly journals Features Of Hippocampal Astrocytic Domains And Their Spatial Relation To Excitatory And Inhibitory Neurons

2020 ◽  
Author(s):  
Ron Refaeli ◽  
Adi Doron ◽  
Aviya Benmelech-Chovav ◽  
Maya Groysman ◽  
Tirzah Kreisel ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Pyramidal Neurons ◽  
Spatial Relation ◽  
Design Principles ◽  
Inhibitory Neurons ◽  
Computational Tools ◽  
Close Proximity ◽  
Somatostatin Neurons ◽  
And Behavior ◽  
Elaborate Structure

SUMMARYThe mounting evidence for the involvement of astrocytes in neuronal circuits function and behavior stands in stark contrast to the lack of detailed anatomical description of these cells and the neurons in their domains. To fill this void, we imaged >30,000 astrocytes in cleared hippocampi, and employed converging genetic, histological and computational tools to determine the elaborate structure, distribution and neuronal content of astrocytic domains. First, we characterized the spatial distribution of >19,000 astrocytes across CA1 lamina, and analyzed the detailed morphology of thousands of reconstructed domains. We then determined the excitatory content of CA1 astrocytes, averaging above 13 pyramidal neurons per domain and increasing towards CA1 midline. Finally, we discovered that somatostatin neurons are found in close proximity to astrocytes, compared to parvalbumin and VIP inhibitory neurons. This resource expands our understanding of fundamental hippocampal design principles, and provides the first quantitative foundation for neuron-astrocyte interactions in this region.

Isostructural Synthesis of Porous Metal–Organic Nanotubes

2014 ◽  
Vol 136 (31) ◽  
pp. 10983-10988 ◽  
Author(s):  
Christopher R. Murdock ◽  
David M. Jenkins
Keyword(s):  
Porous Metal ◽  
Metal Organic ◽  
Organic Nanotubes
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