Chiral Electrochemistry: Anodic Deposition of Enantiopure Helical Molecules

ChemPlusChem ◽  
2020 ◽  
Vol 85 (9) ◽  
pp. 1954-1958
Author(s):  
Jan Vacek ◽  
Jaroslav Zadny ◽  
Jan Storch ◽  
Jan Hrbac
Keyword(s):  
Anodic Deposition ◽  
Helical Molecules

scholarly journals Cover Feature: Chiral Electrochemistry: Anodic Deposition of Enantiopure Helical Molecules (ChemPlusChem 9/2020)

ChemPlusChem ◽  
2020 ◽  
Vol 85 (9) ◽  
pp. 1951-1951
Author(s):  
Jan Vacek ◽  
Jaroslav Zadny ◽  
Jan Storch ◽  
Jan Hrbac
Keyword(s):  
Anodic Deposition ◽  
Helical Molecules

scholarly journals Mechanical single-molecule potentiometers with large switching factors from ortho-pentaphenylene foldamers

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jinshi Li ◽  
Pingchuan Shen ◽  
Shijie Zhen ◽  
Chun Tang ◽  
Yiling Ye ◽  
...  
Keyword(s):  
Charge Transport ◽  
Single Molecule ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Helical Structures ◽  
Anchoring Groups ◽  
Molecular Conductance ◽  
And Control ◽  
Helical Molecules ◽  
Shed Light

AbstractMolecular potentiometers that can indicate displacement-conductance relationship, and predict and control molecular conductance are of significant importance but rarely developed. Herein, single-molecule potentiometers are designed based on ortho-pentaphenylene. The ortho-pentaphenylene derivatives with anchoring groups adopt multiple folded conformers and undergo conformational interconversion in solutions. Solvent-sensitive multiple conductance originating from different conformers is recorded by scanning tunneling microscopy break junction technique. These pseudo-elastic folded molecules can be stretched and compressed by mechanical force along with a variable conductance by up to two orders of magnitude, providing an impressively higher switching factor (114) than the reported values (ca. 1~25). The multichannel conductance governed by through-space and through-bond conducting pathways is rationalized as the charge transport mechanism for the folded ortho-pentaphenylene derivatives. These findings shed light on exploring robust single-molecule potentiometers based on helical structures, and are conducive to fundamental understanding of charge transport in higher-order helical molecules.

Multiple layer formation in the anodic deposition of Hg2C2O4

1987 ◽  
Vol 227 (1-2) ◽  
pp. 147-158 ◽  
Author(s):  
C. Müller ◽  
J. Claret ◽  
M. Sarret
Keyword(s):  
Layer Formation ◽  
Multiple Layer ◽  
Anodic Deposition

ELECTRONIC STATE CALCULATION OF MANGANESE DIOXIDE ELECTRODE WITH ADDITIVE TRANSITION METALS

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4255-4260 ◽  
Author(s):  
BONG-SEO KIM ◽  
SU-DONG PARK ◽  
HEE-WOONG LEE ◽  
DONG-YOON LEE ◽  
WON-SUB CHUNG
Keyword(s):  
Electrical Conductivity ◽  
Transition Metals ◽  
Theoretical Calculation ◽  
Manganese Dioxide ◽  
Cluster Model ◽  
Electronic States ◽  
Deposition Method ◽  
Energy Band Gap ◽  
Anodic Deposition ◽  
Better Than

The electronic states of manganese dioxide substituted with transition metals were theoretically calculated by DV-Xα method, cluster model was Mn 15 O 56 and Mn 14 XO 56 (X = transition metal). The energy band gap of manganese-X oxides is lower than that of manganese dioxide from theoretical calculation. Also it is identified that the electrical conductivity of manganese-tungsten oxide is better than that of manganese dioxide from experiment of anodic deposition method. It is confirmed that the theoretical calculation coincides with experimental results.

Preparation of porous oxide layers by oxygen bubble templated anodic deposition followed by galvanic displacement

2017 ◽  
Vol 253 ◽  
pp. 11-20 ◽  
Author(s):  
Nicola Comisso ◽  
Lidia Armelao ◽  
Sandro Cattarin ◽  
Paolo Guerriero ◽  
Luca Mattarozzi ◽  
...  
Keyword(s):  
Galvanic Displacement ◽  
Oxide Layers ◽  
Oxygen Bubble ◽  
Porous Oxide ◽  
Anodic Deposition

scholarly journals Effective nonlinear model for electron transport in deformable helical molecules

2018 ◽  
Vol 98 (5) ◽  
Author(s):  
E. Díaz ◽  
A. Contreras ◽  
J. Hernández ◽  
F. Domínguez-Adame
Keyword(s):  
Electron Transport ◽  
Nonlinear Model ◽  
Helical Molecules

Synergistic effect of nitrate content and ethanol on photo-assisted anodic deposition of ceria thin films

2017 ◽  
Vol 627 ◽  
pp. 44-52 ◽  
Author(s):  
Yumeng Yang ◽  
Yang Yang ◽  
Xiaoqing Du ◽  
Yu Chen ◽  
Zhongnian Yang ◽  
...  
Keyword(s):  
Thin Films ◽  
Synergistic Effect ◽  
Nitrate Content ◽  
Anodic Deposition

Structure/Chiroptics Relationships of Planar Chiral and Helical Molecules

1998 ◽  
Vol 1998 (8) ◽  
pp. 1491-1509 ◽  
Author(s):  
Stefan Grimme ◽  
Jörg Harren ◽  
Adam Sobanski ◽  
Fritz Vögtle
Keyword(s):  
Helical Molecules

Rabbit Cardiac Myosin. II. Proteolytic Fragmentation with Insolubilized Papain

1975 ◽  
Vol 53 (2) ◽  
pp. 175-188 ◽  
Author(s):  
William T. Wolodko ◽  
Cyril M. Kay
Keyword(s):  
Amino Acid ◽  
Chemical Properties ◽  
Single Type ◽  
Myosin Molecule ◽  
Cardiac Myosin ◽  
Dialdehyde Starch ◽  
Parent Molecule ◽  
Documented Information ◽  
Physical And Chemical ◽  
Helical Molecules

The substructure of the cardiac myosin molecule was examined by the limited proteolytic digestion of the parent molecule with (dialdehyde starch)-methylenedianiline–mercuripapain, S-MDA–mercuripapain, at low temperatures and neutral pH, using moderate enzyme to myosin ratios. Pertinent properties of the insoluble enzyme complex were also examined. Kinetic, ultracentrifugal, and chromatographic observations of the fragmentation process revealed that a single type of lytic reaction occurs during the early stages, predominantly releasing heavy meromyosin subfragment 1 (HMM-S1) and myosin rods. With further time of digestion, the rods are additionally cleaved yielding light meromyosin and HMM-S2, and HMM-S1 is found to be partially degraded. The major proteolytic subfragments were isolated, purified, and characterized with respect to their enzymatic, optical, amino acid, and physicochemical properties. Only HMM-S1 exhibited Ca2+-activated ATPase activity, and at a level three- to fourfold higher than that of native myosin. Moreover, its hydrodynamic properties suggest that it is globular in structure. On the other hand, light meromyosin-A (LMM-A) (which consists mainly of rods), and HMM-S2 appear to be highly asymmetric, rigid, α-helical molecules devoid of the amino acid proline. Strong similarities were evident in all aspects upon comparison of these results with documented information concerning the skeletal system. On the basis of the physical and chemical properties of the proteolytic subfragments relative to that of native myosin, it was further concluded that the cardiac myosin molecule is a double-stranded, α-helical rod ending in two subfragment 1 globules, of which only one may be enzymatically active at a time.

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