scholarly journals A Tale of Two Trimers from Two Different Worlds: A COF‐Inspired Synthetic Strategy for Pore‐Space Partitioning of MOFs

2019 ◽  
Vol 131 (19) ◽  
pp. 6382-6386 ◽  
Author(s):  
Yanxiang Wang ◽  
Xiang Zhao ◽  
Huajun Yang ◽  
Xianhui Bu ◽  
Yong Wang ◽  
...  
Keyword(s):  
Pore Space ◽  
Space Partitioning ◽  
Synthetic Strategy

scholarly journals A Tale of Two Trimers from Two Different Worlds: A COF‐Inspired Synthetic Strategy for Pore‐Space Partitioning of MOFs

2019 ◽  
Vol 58 (19) ◽  
pp. 6316-6320 ◽  
Author(s):  
Yanxiang Wang ◽  
Xiang Zhao ◽  
Huajun Yang ◽  
Xianhui Bu ◽  
Yong Wang ◽  
...  
Keyword(s):  
Pore Space ◽  
Space Partitioning ◽  
Synthetic Strategy

Pore Space Partitioning of Metal–Organic Framework for C2Hx Separation from Methane

2019 ◽  
Vol 58 (9) ◽  
pp. 5410-5413 ◽  
Author(s):  
Jia Li ◽  
Sheng Chen ◽  
Lianyan Jiang ◽  
Dapeng Wu ◽  
Yanshuo Li
Keyword(s):  
Pore Space ◽  
Metal Organic Framework ◽  
Space Partitioning ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Pore space partition of a fragile Ag(i)-carboxylate framework via post-synthetic linker insertion

2020 ◽  
Vol 56 (61) ◽  
pp. 8615-8618
Author(s):  
Dongwook Kim ◽  
Junmo Seong ◽  
Seungwan Han ◽  
Seung Bin Baek ◽  
Myoung Soo Lah
Keyword(s):  
Pore Space ◽  
Space Partitioning ◽  
Space Partition

Pore space partitioning via post-synthetic insertion of dipyridyl linkers with different lengths modulates the porosity of Ag(i)-based MOFs.

Selectivity of CO2via pore space partition in zeolitic boron imidazolate frameworks

2016 ◽  
Vol 52 (17) ◽  
pp. 3552-3555 ◽  
Author(s):  
Hai-Xia Zhang ◽  
Min Liu ◽  
Guilan Xu ◽  
Liyang Liu ◽  
Jian Zhang
Keyword(s):  
High Selectivity ◽  
Pore Space ◽  
Space Partitioning ◽  
Metal Centers ◽  
Space Partition

Co-assembly between boron imidazolate ligands and bridging dicarboxylate ligands with metal centers leads to pore space partitioning in two distinct BIFs with zeotype GIS (BIF-41) and ABW (BIF-42) topologies, respectively. BIF-41 shows high selectivity sorption of CO2 over N2.

Correlation of Pore Structure and Permeability by SEM-Image Analysis

1990 ◽  
Vol 48 (1) ◽  
pp. 428-429
Author(s):  
C. A. Callender ◽  
Wm. C. Dawson ◽  
J. J. Funk
Keyword(s):  
Image Analysis ◽  
Pore Structure ◽  
Imaging System ◽  
Pore Space ◽  
Simulation Models ◽  
Image Analyzer ◽  
Imaging Data ◽  
Sem Images ◽  
Thin Sections ◽  
Rock Types

The geometric structure of pore space in some carbonate rocks can be correlated with petrophysical measurements by quantitatively analyzing binaries generated from SEM images. Reservoirs with similar porosities can have markedly different permeabilities. Image analysis identifies which characteristics of a rock are responsible for the permeability differences. Imaging data can explain unusual fluid flow patterns which, in turn, can improve production simulation models.Analytical SchemeOur sample suite consists of 30 Middle East carbonates having porosities ranging from 21 to 28% and permeabilities from 92 to 2153 md. Engineering tests reveal the lack of a consistent (predictable) relationship between porosity and permeability (Fig. 1). Finely polished thin sections were studied petrographically to determine rock texture. The studied thin sections represent four petrographically distinct carbonate rock types ranging from compacted, poorly-sorted, dolomitized, intraclastic grainstones to well-sorted, foraminiferal,ooid, peloidal grainstones. The samples were analyzed for pore structure by a Tracor Northern 5500 IPP 5B/80 image analyzer and a 80386 microprocessor-based imaging system. Between 30 and 50 SEM-generated backscattered electron images (frames) were collected per thin section. Binaries were created from the gray level that represents the pore space. Calculated values were averaged and the data analyzed to determine which geological pore structure characteristics actually affect permeability.

Generation of Phosphoranyl Radicals via Photoredox Catalysis Enables Voltage–Independent Activation of Strong C–O Bonds

2018 ◽  
Author(s):  
Erin Stache ◽  
Alyssa B. Ertel ◽  
Tomislav Rovis ◽  
Abigail G. Doyle
Keyword(s):  
Carboxylic Acids ◽  
Functional Groups ◽  
Single Step ◽  
Direct Access ◽  
Photoredox Catalysis ◽  
Acyl Radical ◽  
Synthetic Strategy ◽  
Acyl Radicals ◽  
Benzyl Radicals ◽  
Aliphatic Carboxylic Acids

Alcohols and carboxylic acids are ubiquitous functional groups found in organic molecules that could serve as radical precursors, but C–O bonds remain difficult to activate. We report a synthetic strategy for direct access to both alkyl and acyl radicals from these ubiquitous functional groups via photoredox catalysis. This method exploits the unique reactivity of phosphoranyl radicals, generated from a polar/SET crossover between a phosphine radical cation and an oxygen centered nucleophile. We first show the desired reactivity in the reduction of benzylic alcohols to the corresponding benzyl radicals with terminal H-atom trapping to afford the deoxygenated product. Using the same method, we demonstrate access to synthetically versatile acyl radicals which enables the reduction of aromatic and aliphatic carboxylic acids to the corresponding aldehydes with exceptional chemoselectivity. This protocol also transforms carboxylic acids to heterocycles and cyclic ketones via intramolecular acyl radical cyclizations to forge new C–O, C–N and C–C bonds in a single step.

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