scholarly journals A high-resolution infrared spectroscopic investigation of the halogen atom–HCN entrance channel complexes solvated in superfluid helium droplets

2007 ◽  
Vol 9 (3) ◽  
pp. 401-416 ◽  
Author(s):  
Jeremy M. Merritt ◽  
Jochen Küpper ◽  
Roger E. Miller
Keyword(s):  
High Resolution ◽  
Superfluid Helium ◽  
Spectroscopic Investigation ◽  
Halogen Atom ◽  
Entrance Channel ◽  
Helium Droplets ◽  
Infrared Spectroscopic

Infrared Spectroscopic Study of Trifluoromethoxybenzene⋯Methanol Complexes Formed in Superfluid Helium Nanodroplets

2021 ◽  
Author(s):  
Tarun Kumar Kumar Roy ◽  
Devendra Mani ◽  
Gerhard Schwaab ◽  
Martina Havenith
Keyword(s):  
Infrared Spectroscopy ◽  
Complex Formation ◽  
Spectroscopic Study ◽  
Spectral Range ◽  
Superfluid Helium ◽  
Infrared Spectroscopic Study ◽  
Intermolecular Complex ◽  
Helium Droplets ◽  
Helium Nanodroplets ◽  
Infrared Spectroscopic

We have studied the intermolecular complex formation between trifluoromethoxybenzene and methanol (CD3OD) by infrared spectroscopy in superfluid helium droplets in the spectral range of 2630 and 2730 cm-1, covering the...

High-Resolution Electronic Spectroscopy of the BODIPY Chromophore in Supersonic Beam and Superfluid Helium Droplets

ChemPhysChem ◽  
2011 ◽  
Vol 12 (10) ◽  
pp. 1969-1980 ◽  
Author(s):  
Anja Stromeck-Faderl ◽  
Dominik Pentlehner ◽  
Uwe Kensy ◽  
Bernhard Dick
Keyword(s):  
High Resolution ◽  
Superfluid Helium ◽  
Electronic Spectroscopy ◽  
Helium Droplets

High-Resolution Cryo-Electron Microscopy of Biological Macromolecules

1990 ◽  
Vol 48 (1) ◽  
pp. 126-127
Author(s):  
Yoshinori Fujiyoshi
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Diffraction Pattern ◽  
Superfluid Helium ◽  
Copper Phthalocyanine ◽  
Optical Diffraction ◽  
Irradiation Damage ◽  
Biological Macromolecules ◽  
Cross Sectional ◽  
Instrumental Resolution

The resolution of direct images of biological macromolecules is normally restricted to far less than 0.3 nm. This is not due instrumental resolution, but irradiation damage. The damage to biological macromolecules may expect to be reduced when they are cooled to a very low temperature. We started to develop a new cryo-stage for a high resolution electron microscopy in 1983, and successfully constructed a superfluid helium stage for a 400 kV microscope by 1986, whereby chlorinated copper-phthalocyanine could be photographed to a resolution of 0.26 nm at a stage temperature of 1.5 K. We are continuing to develop the cryo-microscope and have developed a cryo-microscope equipped with a superfluid helium stage and new cryo-transfer device.The New cryo-microscope achieves not only improved resolution but also increased operational ease. The construction of the new super-fluid helium stage is shown in Fig. 1, where the cross sectional structure is shown parallel to an electron beam path. The capacities of LN2 tank, LHe tank and the pot are 1400 ml, 1200 ml and 3 ml, respectively. Their surfaces are placed with gold to minimize thermal radiation. Consumption rates of liquid nitrogen and liquid helium are 170 ml/hour and 140 ml/hour, respectively. The working time of this stage is more than 7 hours starting from full LN2 and LHe tanks. Instrumental resolution of our cryo-stage cooled to 4.2 K was confirmed to be 0.20 nm by an optical diffraction pattern from the image of a chlorinated copper-phthalocyanine crystal. The image and the optical diffraction pattern are shown in Fig. 2 a, b, respectively.

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