High resolution infrared spectroscopy of the asymmetric C–H stretch of 1,2,4,5-tetracyanobenzene (TCNB) and (TCNB)2 in superfluid helium nanodroplets

2008 ◽  
Vol 129 (17) ◽  
pp. 174311 ◽  
Author(s):  
Anna Gutberlet ◽  
Özgür Birer ◽  
Torsten Poerschke ◽  
Martina Havenith
Keyword(s):  
Infrared Spectroscopy ◽  
High Resolution ◽  
Superfluid Helium ◽  
Helium Nanodroplets

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 infrared spectroscopy of Mg–HF and Mg–(HF)[sub 2] solvated in helium nanodroplets

2009 ◽  
Vol 130 (18) ◽  
pp. 184313 ◽  
Author(s):  
Paul L. Stiles ◽  
Gary E. Douberly ◽  
Roger E. Miller
Keyword(s):  
Infrared Spectroscopy ◽  
High Resolution ◽  
Helium Nanodroplets

scholarly journals Helium droplet infrared spectroscopy of glycine and glycine–water aggregates

2016 ◽  
Vol 18 (40) ◽  
pp. 28082-28090 ◽  
Author(s):  
Matin Kaufmann ◽  
Daniel Leicht ◽  
Raffael Schwan ◽  
Devendra Mani ◽  
Gerhard Schwaab ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Superfluid Helium ◽  
Frequency Range ◽  
Helium Nanodroplets ◽  
Helium Droplet ◽  
Infrared Absorption Spectra

Infrared absorption spectra of glycine and glycine–water aggregates embedded in superfluid helium nanodroplets were recorded in the frequency range 1000–1450 cm−1.

scholarly journals Dimers of acetic acid in helium nanodroplets

2019 ◽  
Vol 21 (26) ◽  
pp. 13950-13958 ◽  
Author(s):  
Julia A. Davies ◽  
Magnus W. D. Hanson-Heine ◽  
Nicholas A. Besley ◽  
Andrew Shirley ◽  
James Trowers ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Infrared Spectroscopy ◽  
Condensed Phase ◽  
Superfluid Helium ◽  
Helium Nanodroplets ◽  
Phase Structures ◽  
Insight Into

Two metastable dimers are created inside superfluid helium and studied using infrared spectroscopy to provide insight into condensed phase structures.

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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