Constructing Long-Range Transfer Pathways with Ordered Acid–Base Pairs for Highly Enhanced Proton Conduction

2019 ◽  
Vol 11 (10) ◽  
pp. 9964-9973 ◽  
Author(s):  
Yarong Liu ◽  
Wenjia Wu ◽  
Ping Li ◽  
Jianlong Lin ◽  
Zhihao Yang ◽  
...  
Keyword(s):  
Long Range ◽  
Proton Conduction ◽  
Acid Base ◽  
Base Pairs

Porous nanofiber composite membrane with 3D interpenetrating networks towards ultrafast and isotropic proton conduction

2020 ◽  
Vol 8 (10) ◽  
pp. 5128-5137 ◽  
Author(s):  
Yafang Zhang ◽  
Xiang Zhang ◽  
Ping Li ◽  
Wenjia Wu ◽  
Jianlong Lin ◽  
...  
Keyword(s):  
Composite Membrane ◽  
Composite Membranes ◽  
Proton Conduction ◽  
Interpenetrating Networks ◽  
Acid Base ◽  
Base Pairs ◽  
Nanofiber Composite ◽  
Porous Nanofiber

Nanofiber composite membranes with 3D interpenetrating nanopore networks and enriched acid–base pairs exhibit ultrafast and isotropic proton conduction.

Synergistic effect of MOF-Directed ordered acid-base pairs for enhanced proton conduction

2021 ◽  
pp. 111199
Author(s):  
Qinghui Wang ◽  
Xiaofeng Zheng ◽  
Huixuan Chen ◽  
Zhikang Shi ◽  
Huan Tang ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Proton Conduction ◽  
Acid Base ◽  
Base Pairs

scholarly journals Conserved long-range base pairings are associated with pre-mRNA processing of human genes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Svetlana Kalmykova ◽  
Marina Kalinina ◽  
Stepan Denisov ◽  
Alexey Mironov ◽  
Dmitry Skvortsov ◽  
...  
Keyword(s):  
Long Range ◽  
Rna Folding ◽  
Current Knowledge ◽  
Rna Structures ◽  
Base Pairs ◽  
Protein Coding ◽  
Proximity Ligation ◽  
Transcriptional Suppression ◽  
Human Genes ◽  
Cleavage And Polyadenylation

AbstractThe ability of nucleic acids to form double-stranded structures is essential for all living systems on Earth. Current knowledge on functional RNA structures is focused on locally-occurring base pairs. However, crosslinking and proximity ligation experiments demonstrated that long-range RNA structures are highly abundant. Here, we present the most complete to-date catalog of conserved complementary regions (PCCRs) in human protein-coding genes. PCCRs tend to occur within introns, suppress intervening exons, and obstruct cryptic and inactive splice sites. Double-stranded structure of PCCRs is supported by decreased icSHAPE nucleotide accessibility, high abundance of RNA editing sites, and frequent occurrence of forked eCLIP peaks. Introns with PCCRs show a distinct splicing pattern in response to RNAPII slowdown suggesting that splicing is widely affected by co-transcriptional RNA folding. The enrichment of 3’-ends within PCCRs raises the intriguing hypothesis that coupling between RNA folding and splicing could mediate co-transcriptional suppression of premature pre-mRNA cleavage and polyadenylation.

A promising Al-CeZrO4/HPW-incorporated SPEEK composite membrane with improved proton conductivity and chemical stability for PEM fuel cells

2020 ◽  
pp. 095400832095707
Author(s):  
Yingfeng Wang ◽  
Jiabin You ◽  
Zhuowei Cheng ◽  
Kun Jiang ◽  
Linlin Zhang ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Composite Membrane ◽  
Chemical Stability ◽  
Pem Fuel Cells ◽  
Nanocomposite Membrane ◽  
Acid Base ◽  
Base Pairs ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Speek Membrane

An improved sulfonated poly (ether ether ketone) (SPEEK) nanocomposite membrane was prepared by incorporating both phosphotungstic acid (HPW) and Al doped cerium-based oxides (Al-CeZrO4) in SPEEK matrix. The HPW was immobilized by Al-CeZrO4 so that firmly dispersed acid–base pairs were formed. The introduction of Al-CeZrO4 helped improve the chemical stability of the pristine (baseline) SPEEK membrane without compromising the conductivity, and the addition of HPW further enhanced the conduction of protons through acid–base interactions. Stability tests showed that when the SPEEK/Al-CeZrO4 nanocomposite membrane was immersed in a Fenton’s solution for 108 h at 80°C, a loss of 34.9% in proton conductivity was observed, which is 24.1% less than that of the pristine SPEEK membrane, indicating that the attenuation of membrane proton conductivity was inhibited. At the same time, the proton conductivity of the SPEEK/Al-CeZrO4/HPW nanocomposite membrane (that has already incorporated HPW) was increased by 15.5% compared to the SPEEK/Al-CeZrO4 nanocomposite membrane. Hence, Al-CeZrO4/HPW is considered as an effective inorganic nanofiller for improving both proton conductivity and chemical stability of SPEEK membranes, and the hybrid composite membrane is worth further studying.

scholarly journals Sc3N@Ih-C80 as a novel Lewis acid to trap abnormal N-heterocyclic carbenes: the unprecedented formation of a singly bonded [6,6,6]-adduct

2016 ◽  
Vol 7 (3) ◽  
pp. 2331-2334 ◽  
Author(s):  
Muqing Chen ◽  
Lipiao Bao ◽  
Min Ai ◽  
Wangqiang Shen ◽  
Xing Lu
Keyword(s):  
Lewis Acid ◽  
Heterocyclic Carbenes ◽  
Acid Base ◽  
Base Pairs ◽  
Endohedral Metallofullerenes ◽  
Carbon Based

An unprecedented singly bonded [6,6,6]-adduct with an abnormal N-heterocyclic carbene structure, represents the first example of carbon-based Lewis acid–base pairs based on endohedral metallofullerenes.

ChemInform Abstract: Taking the F Out of FLP: Simple Lewis Acid-Base Pairs for Mild Reductions with Neutral Boranes via Borenium Ion Catalysis.

ChemInform ◽  
2013 ◽  
Vol 44 (16) ◽  
pp. no-no
Author(s):  
Patrick Eisenberger ◽  
Adrian M. Bailey ◽  
Cathleen M. Crudden
Keyword(s):  
Lewis Acid ◽  
Acid Base ◽  
Base Pairs

Self-adjusted synthesis of ordered stable mesoporous minerals by acid–base pairs

2003 ◽  
Vol 2 (3) ◽  
pp. 159-163 ◽  
Author(s):  
Bozhi Tian ◽  
Xiaoying Liu ◽  
Bo Tu ◽  
Chengzhong Yu ◽  
Jie Fan ◽  
...  
Keyword(s):  
Acid Base ◽  
Base Pairs
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