Pyrrolic molecular rotors acting as viscosity sensors with high fluorescence contrast

2016 ◽  
Vol 52 (94) ◽  
pp. 13695-13698 ◽  
Author(s):  
Seung-Chul Lee ◽  
Jeongyun Heo ◽  
Jong-Wan Ryu ◽  
Chang-Lyoul Lee ◽  
Sehoon Kim ◽  
...  
Keyword(s):  
Molecular Rotors ◽  
Order Of Magnitude ◽  
Viscosity Sensors ◽  
Fluorescence Contrast ◽  
High Fluorescence

Pyrrolic viscosity sensors exhibit one order of magnitude higher fluorescence contrast compared to that of the conventional phenolic analogues due to the viscosity-sensitive rotation of the rotational pyrrole group.

Front Cover: Fluorescent Molecular Rotors for Viscosity Sensors (Chem. Eur. J. 52/2018)

2018 ◽  
Vol 24 (52) ◽  
pp. 13688-13688
Author(s):  
Seung-Chul Lee ◽  
Jeongyun Heo ◽  
Hee Chul Woo ◽  
Ji-Ah Lee ◽  
Young Hun Seo ◽  
...  
Keyword(s):  
Molecular Rotors ◽  
Front Cover ◽  
Fluorescent Molecular Rotors ◽  
Viscosity Sensors

ChemInform Abstract: Molecular Rotors: Synthesis and Evaluation as Viscosity Sensors.

ChemInform ◽  
2010 ◽  
Vol 41 (32) ◽  
pp. no-no
Author(s):  
Jeyanthy Sutharsan ◽  
Darcy Lichlyter ◽  
Nathan E. Wright ◽  
Marianna Dakanali ◽  
Mark A. Haidekker ◽  
...  
Keyword(s):  
Molecular Rotors ◽  
Viscosity Sensors

scholarly journals Molecular rotors: synthesis and evaluation as viscosity sensors

Tetrahedron ◽  
2010 ◽  
Vol 66 (14) ◽  
pp. 2582-2588 ◽  
Author(s):  
Jeyanthy Sutharsan ◽  
Darcy Lichlyter ◽  
Nathan E. Wright ◽  
Marianna Dakanali ◽  
Mark A. Haidekker ◽  
...  
Keyword(s):  
Molecular Rotors ◽  
Viscosity Sensors

Fluorescent Molecular Rotors for Viscosity Sensors

2018 ◽  
Vol 24 (52) ◽  
pp. 13706-13718 ◽  
Author(s):  
Seung-Chul Lee ◽  
Jeongyun Heo ◽  
Hee Chul Woo ◽  
Ji-Ah Lee ◽  
Young Hun Seo ◽  
...  
Keyword(s):  
Molecular Rotors ◽  
Fluorescent Molecular Rotors ◽  
Viscosity Sensors

scholarly journals Fluorescent Molecular Rotors for Viscosity Sensors

2018 ◽  
Vol 24 (52) ◽  
pp. 13692-13692 ◽  
Author(s):  
Seung-Chul Lee ◽  
Jeongyun Heo ◽  
Hee Chul Woo ◽  
Ji-Ah Lee ◽  
Young Hun Seo ◽  
...  
Keyword(s):  
Molecular Rotors ◽  
Fluorescent Molecular Rotors ◽  
Viscosity Sensors

scholarly journals Frontispiece: Fluorescent Molecular Rotors for Viscosity Sensors

2018 ◽  
Vol 24 (52) ◽  
Author(s):  
Seung-Chul Lee ◽  
Jeongyun Heo ◽  
Hee Chul Woo ◽  
Ji-Ah Lee ◽  
Young Hun Seo ◽  
...  
Keyword(s):  
Molecular Rotors ◽  
Fluorescent Molecular Rotors ◽  
Viscosity Sensors

A controller for safe, convenient operation of LaB6 emitters on electron-beam instruments

1983 ◽  
Vol 41 ◽  
pp. 408-409
Author(s):  
W. J. Abramson ◽  
H. W. Estry ◽  
L. F. Allard
Keyword(s):  
Electron Beam ◽  
Control System ◽  
Thermal Shock ◽  
Appropriate Care ◽  
Electron Guns ◽  
Tungsten Filaments ◽  
Order Of Magnitude ◽  
Main Components

LaB6 emitters are becoming increasingly popular as direct replacements for tungsten filaments in the electron guns of modern electron-beam instruments. These emitters offer order of magnitude increases in beam brightness, and, with appropriate care in operation, a corresponding increase in source lifetime. They are, however, an order of magnitude more expensive, and may be easily damaged (by improper vacuum conditions and thermal shock) during saturation/desaturation operations. These operations typically require several minutes of an operator's attention, which becomes tedious and subject to error, particularly since the emitter must be cooled during sample exchanges to minimize damage from random vacuum excursions. We have designed a control system for LaBg emitters which relieves the operator of the necessity for manually controlling the emitter power, minimizes the danger of accidental improper operation, and makes the use of these emitters routine on multi-user instruments.Figure 1 is a block schematic of the main components of the control system, and Figure 2 shows the control box.

Novel magneto-optical recording materials: Bi-substituted garnet films

1991 ◽  
Vol 49 ◽  
pp. 776-777
Author(s):  
Takao Suzuki ◽  
Hossein Nuri
Keyword(s):  
Grain Size ◽  
Amorphous Film ◽  
Nitrogen Atmosphere ◽  
Optical Recording ◽  
Garnet Film ◽  
Media Noise ◽  
Garnet Films ◽  
Order Of Magnitude ◽  
A New Technique ◽  
A Current

For future high density magneto-optical recording materials, a Bi-substituted garnet film ((BiDy)3(FeGa)5O12) is an attractive candidate since it has strong magneto-optic effect at short wavelengths less than 600 nm. The signal in read back performance at 500 nm using a garnet film can be an order of magnitude higher than a current rare earth-transition metal amorphous film. However, the granularity and surface roughness of such crystalline garnet films are the key to control for minimizing media noise.We have demonstrated a new technique to fabricate a garnet film which has much smaller grain size and smoother surfaces than those annealed in a conventional oven. This method employs a high ramp-up rate annealing (Γ = 50 ~ 100 C/s) in nitrogen atmosphere. Fig.1 shows a typical microstruture of a Bi-susbtituted garnet film deposited by r.f. sputtering and then subsequently crystallized by a rapid thermal annealing technique at Γ = 50 C/s at 650 °C for 2 min. The structure is a single phase of garnet, and a grain size is about 300A.

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