Porous networks based on iron(ii) clathrochelate complexes

2019 ◽  
Vol 48 (14) ◽  
pp. 4582-4588 ◽  
Author(s):  
José L. Bila ◽  
Joffrey Pijeat ◽  
Andrea Ramorini ◽  
Farzaneh Fadaei-Tirani ◽  
Rosario Scopelliti ◽  
...  
Keyword(s):  
Hydrolytic Degradation ◽  
Microporous Polymers ◽  
Surface Areas ◽  
Porous Networks ◽  
Clathrochelate Complexes

Iron clathrochelate complexes were used for the preparation of microporous polymers. The networks display permanent porosity with apparent Brunauer–Emmett–Teller surface areas of up to SABET = 593 m2 g−1, and they are not susceptible to hydrolytic degradation.

scholarly journals The effect of molecular weight on the porosity of hypercrosslinked polystyrene

2015 ◽  
Vol 6 (41) ◽  
pp. 7280-7285 ◽  
Author(s):  
Thanchanok Ratvijitvech ◽  
Michael Barrow ◽  
Andrew I. Cooper ◽  
Dave J. Adams
Keyword(s):  
Molecular Weight ◽  
Hypercrosslinked Polystyrene ◽  
Degree Of Polymerisation ◽  
Microporous Polymers ◽  
Surface Areas

Microporous polymers can be prepared by crosslinking polystyrenes, with the surface areas being dependent on the degree of polymerisation.

Polytriazine porous networks for effective iodine capture

2020 ◽  
Vol 11 (16) ◽  
pp. 2786-2790 ◽  
Author(s):  
Chenchen Feng ◽  
Guangjuan Xu ◽  
Wei Xie ◽  
Shuran Zhang ◽  
Chan Yao ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Microporous Polymers ◽  
Mild Conditions ◽  
Porous Networks ◽  
Conjugated Microporous Polymers

Herein we present a rational strategy for the development of nitrogen-enriched conjugated microporous polymers (CMPs) (TBTT-CMP@1, 2 and 3) via a BH coupling reaction under mild conditions, for the super absorption of iodine. TBTT-CMP@1 exhibited iodine capture amount up to 442 wt%.

Photocatalytic Hydrogen Evolution from Water Using Heterocyclic Conjugated Microporous Polymers: Porous or Non-Porous?

2018 ◽  
Author(s):  
Reiner Sebastian Sprick ◽  
Yang Bai ◽  
Catherine M. Aitchison ◽  
Duncan J. Woods ◽  
Andrew I. Cooper
Keyword(s):  
Hydrogen Evolution ◽  
External Quantum Efficiency ◽  
Structural Analog ◽  
Linear Polymers ◽  
Porous Network ◽  
Photocatalytic Hydrogen Evolution ◽  
Microporous Polymers ◽  
Porous Networks ◽  
Hole Scavenger ◽  
Conjugated Microporous Polymers

<p>Three series of conjugated microporous polymers (CMPs) were studied as photocatalysts for producing hydrogen from water using a sacrificial hole-scavenger. In all cases, dibenzo[<i>b</i>,<i>d</i>]thiophene sulfone polymers outperformed their fluorene analogs. A porous network, S-CMP3, showed the highest hydrogen evolution rate of 6076 µmol h<sup>-1</sup> g<sup>-1</sup> (λ > 295 nm) and 3106 µmol h<sup>-1</sup> g<sup>-1</sup> (λ > 420 nm), with an external quantum efficiency of 13.2% at 420 nm. S-CMP3 outperforms its linear structural analog, P35, while in other cases, non-porous linear polymers are superior to equivalent porous networks. This suggests that microporosity can be beneficial for sacrificial photocatalytic hydrogen evolution, but not for all monomer combinations.</p>

Carbon black nanoparticle trapping: A strategy to realize the true energy storage potential of redox-active conjugated microporous polymers

2021 ◽  
Author(s):  
Seung Uk Son ◽  
Changwan Kang ◽  
Yoon-Joo Ko ◽  
Sang Moon Lee ◽  
Hae Jin Kim ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrode Materials ◽  
High Surface ◽  
Electric Energy ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Electric Energy Storage ◽  
Microporous Polymers ◽  
Surface Areas ◽  
Conjugated Microporous Polymers

Conjugated microporous polymers (CMPs) have significant potential as electrode materials for electric energy storage devices, due to their high surface areas, conjugation features, and chemical stability. However, the low conductivity...

Fast Adsorption of Erythromycin on the Conjugated Microporous Polymers

2014 ◽  
Vol 1073-1076 ◽  
pp. 32-38
Author(s):  
Chun Li Zheng ◽  
Miao Miao Du ◽  
Yu Zhou Rong
Keyword(s):  
Adsorption Process ◽  
Order Model ◽  
Water Separation ◽  
Film Diffusion ◽  
Microporous Polymers ◽  
Solvent Water ◽  
Surface Areas ◽  
Pseudo Second Order ◽  
Kinetics Of ◽  
Conjugated Microporous Polymers

As a kind of ideal porous absorbents with tunable porosity, large surface areas, and hydrophobicity, conjugated microporous polymers (CMPs) have recently received extensive attention in oil/organic solvent-water separation. However, reports on the application of CMPs in adsorption of erythromycin (ERY) from water are very few. In this work, the adsorption of ERY by three kinds of CMPs was firstly studied. It was observed that all the CMPs extracted ERY quickly from water. The adsorption kinetics of ERY on the three CMPs was well expressed by the pseudo-second-order model, and the adsorption process was found to be mainly controlled by film diffusion. Increasing surface area of the CMPs resulted in greater extent of adsorption. This work may provide fundamental guidance for removal of antibiotics by CMPs.

Conjugated microporous polymers using a copper-catalyzed [4 + 2] cyclobenzannulation reaction: promising materials for iodine and dye adsorption

2021 ◽  
Vol 12 (15) ◽  
pp. 2282-2292
Author(s):  
Noorullah Baig ◽  
Suchetha Shetty ◽  
Saleh Al-Mousawi ◽  
Bassam Alameddine
Keyword(s):  
Methylene Blue ◽  
Dye Adsorption ◽  
Design Strategy ◽  
Microporous Polymers ◽  
Surface Areas ◽  
Conjugated Microporous Polymers

A new design strategy is disclosed to synthesize conjugated microporous polymers using a Cu-catalyzed [4 + 2] cyclobenzannulation reaction. The polymers reveal BET surface areas up to 794 m2 g−1 and promising uptake of iodine and methylene blue.

Photocatalytic Hydrogen Evolution from Water Using Heterocyclic Conjugated Microporous Polymers: Porous or Non-Porous?

2018 ◽  
Author(s):  
Reiner Sebastian Sprick ◽  
Yang Bai ◽  
Catherine M. Aitchison ◽  
Duncan J. Woods ◽  
Andrew I. Cooper
Keyword(s):  
Hydrogen Evolution ◽  
External Quantum Efficiency ◽  
Structural Analog ◽  
Linear Polymers ◽  
Porous Network ◽  
Photocatalytic Hydrogen Evolution ◽  
Microporous Polymers ◽  
Porous Networks ◽  
Hole Scavenger ◽  
Conjugated Microporous Polymers

<p>Three series of conjugated microporous polymers (CMPs) were studied as photocatalysts for producing hydrogen from water using a sacrificial hole-scavenger. In all cases, dibenzo[<i>b</i>,<i>d</i>]thiophene sulfone polymers outperformed their fluorene analogs. A porous network, S-CMP3, showed the highest hydrogen evolution rate of 6076 µmol h<sup>-1</sup> g<sup>-1</sup> (λ > 295 nm) and 3106 µmol h<sup>-1</sup> g<sup>-1</sup> (λ > 420 nm), with an external quantum efficiency of 13.2% at 420 nm. S-CMP3 outperforms its linear structural analog, P35, while in other cases, non-porous linear polymers are superior to equivalent porous networks. This suggests that microporosity can be beneficial for sacrificial photocatalytic hydrogen evolution, but not for all monomer combinations.</p>

Synthetic control of the polar units in poly(thiophene carbazole) porous networks for effective CO2 capture

2019 ◽  
Vol 43 (18) ◽  
pp. 6838-6842 ◽  
Author(s):  
Chan Yao ◽  
Di Cui ◽  
Yiang Zhu ◽  
Wei Xie ◽  
Shuran Zhang ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Synthetic Control ◽  
Organic Structure ◽  
Microporous Polymers ◽  
Porous Networks ◽  
Conjugated Microporous Polymers

Herein we present a rational strategy for the design of a porous organic structure based on conjugated microporous polymers (CMPs), aiming for the super absorption of CO2.

scholarly journals Pyrrole-Based Conjugated Microporous Polymers as Efficient Heterogeneous Catalysts for Knoevenagel Condensation

2021 ◽  
Vol 9 ◽  
Author(s):  
Ruidong Gao ◽  
Guang Zhang ◽  
Fanli Lu ◽  
Long Chen ◽  
Yang Li
Keyword(s):  
Specific Surface ◽  
High Performance ◽  
Heterogeneous Catalysts ◽  
Knoevenagel Condensation ◽  
Condensation Reaction ◽  
High Catalytic Activity ◽  
Microporous Polymers ◽  
Surface Areas ◽  
Specific Surface Areas ◽  
Conjugated Microporous Polymers

Conjugated microporous polymers (CMPs) with robust architectures, facilely tunable pore sizes and large specific surface areas have emerged as an important class of porous materials due to their demonstrated prospects in various fields, e.g. gas storage/separation and heterogeneous catalysis. Herein, two new pyrrole-based CMPs with large specific surface areas and good stabilities were successfully prepared by one-step oxidative self-polycondensation of 1,2,4,5-tetra (pyrrol-2-ly)benzene or 1,3,5-tri (pyrrol-2-ly)benzene, respectively. Interestingly, both CMPs showed very high catalytic activity toward Knoevenagel condensation reaction, which was attributed to the inherent pore channels, high specific surface areas and abundant nitrogen sites within CMPs. Additionally, both CMPs displayed excellent recyclability with negligible degradation after 10 cycles. This work provides new possibilities into designing novel nitrogen-rich high-performance heterogeneous catalysts.

Cerebral Tissue Response in Chronic Electrode Implantation

1977 ◽  
Vol 35 ◽  
pp. 624-625
Author(s):  
R.F. Dodson ◽  
L.W-F Chu ◽  
N. Ishihara
Keyword(s):  
Tissue Response ◽  
Whole Body ◽  
Platinum Electrodes ◽  
Fixed Tissue ◽  
Electrode Implantation ◽  
Surface Areas ◽  
Tissue Changes ◽  
Micron Diameter ◽  
Extent Of Damage ◽  
Electrode Sheath

The extent of damage surrounding an implanted electrode in the cerebral cortex is a question of significant importance with regard to attaining consistency and validity of physiological recordings. In order to determine the extent of such tissue changes, 150 micron diameter platinum electrodes were implanted in the cortex of four adult baboons, and after eight days the animals were sacrificed by whole body perfusion with a 3% glutaraldehyde in 0.1M phosphate fixative.The calvarium was carefully removed and the electrode tracts were readily discernible in the firm, glutaraldehyde fixed tissue.Careful dissection of the zone of the electrode tract resulted in a small block which was further sectioned into tip, mid-tract and surface areas. Ultrastructurally, damage extended from the electrode sheath to the greatest extent of from 0.2 to 3.5 mm.

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