Hydrogen-Bond-Directed 2-D Sheet Assemblies of Sulfamide Derivatives: Formation of Giant Vesicles with Patchwork-Like Surface Pattern

Langmuir ◽  
2011 ◽  
Vol 27 (14) ◽  
pp. 8950-8955 ◽  
Author(s):  
Shin-ichiro Kabashima ◽  
Sachiko Tanaka ◽  
Motohiro Kageyama ◽  
Isao Yoshikawa ◽  
Koji Araki
Keyword(s):  
Hydrogen Bond ◽  
Surface Pattern ◽  
Giant Vesicles

Dry Micromanipulation of Supramolecular Giant Vesicles on a Silicon Substrate: Highly Stable Hydrogen-Bond-Directed Nanosheet Membrane

2012 ◽  
Vol 134 (38) ◽  
pp. 15684-15687 ◽  
Author(s):  
Hirotoshi Sakaino ◽  
Jun Sawayama ◽  
Shin-ichiro Kabashima ◽  
Isao Yoshikawa ◽  
Koji Araki
Keyword(s):  
Hydrogen Bond ◽  
Silicon Substrate ◽  
Giant Vesicles ◽  
Stable Hydrogen Bond

Hydrogen-Bond-Directed Giant Vesicles of Guanosine Derivatives in Water: Formation, Structure, and Stability

Langmuir ◽  
2010 ◽  
Vol 26 (11) ◽  
pp. 8030-8035 ◽  
Author(s):  
Jun Sawayama ◽  
Isao Yoshikawa ◽  
Koji Araki
Keyword(s):  
Hydrogen Bond ◽  
Giant Vesicles ◽  
Structure And Stability ◽  
Water Formation

Electron-Mirror Microscopic Aspects of Ferroelectric Domains of BaTiO3 And Ca2Sr (C2H5CO2)6

1970 ◽  
Vol 28 ◽  
pp. 478-479
Author(s):  
Teruo Someya ◽  
Jinzo Kobayashi
Keyword(s):  
Surface Layer ◽  
Electric Fields ◽  
Quantitative Study ◽  
Recent Progress ◽  
Ferroelectric Domain ◽  
Resolving Power ◽  
Surface Pattern ◽  
Crystal Surfaces ◽  
One Dimensional ◽  
Ferroelectric Domains

Recent progress in the electron-mirror microscopy (EMM), e.g., an improvement of its resolving power together with an increase of the magnification makes it useful for investigating the ferroelectric domain physics. English has recently observed the domain texture in the surface layer of BaTiO3. The present authors ) have developed a theory by which one can evaluate small one-dimensional electric fields and/or topographic step heights in the crystal surfaces from their EMM pictures. This theory was applied to a quantitative study of the surface pattern of BaTiO3).

A Hydrogen Bond Between Linear Tetrapyrrole and Conserved Aspartate Causes the Far-Red Shifted Absorption of Phytochrome Photoreceptors

2020 ◽  
Author(s):  
Egle Maximowitsch ◽  
Tatiana Domratcheva
Keyword(s):  
Hydrogen Bond ◽  
Light Adaptation ◽  
Positive Charge ◽  
Pyrrole Ring ◽  
Md Simulations ◽  
Spectral Shift ◽  
Specific Domain ◽  
Study Guides ◽  
Rational Engineering ◽  
Tuning Mechanism

Photoswitching of phytochrome photoreceptors between red-absorbing (Pr) and far-red absorbing (Pfr) states triggers light adaptation of plants, bacteria and other organisms. Using quantum chemistry, we elucidate the color-tuning mechanism of phytochromes and identify the origin of the Pfr-state red-shifted spectrum. Spectral variations are explained by resonance interactions of the protonated linear tetrapyrrole chromophore. In particular, hydrogen bonding of pyrrole ring D with the strictly conserved aspartate shifts the positive charge towards ring D thereby inducing the red spectral shift. Our MD simulations demonstrate that formation of the ring D–aspartate hydrogen bond depends on interactions between the chromophore binding domain (CBD) and phytochrome specific domain (PHY). Our study guides rational engineering of fluorescent phytochromes with a far-red shifted spectrum.

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