The reporter learned from the National Center for Nanoscience that researchers at the National Center for Nanosciences used atomic force microscopy to observe intermolecular hydrogen bonding and coordinate bond interactions in real space, and for the first time in the world realized direct interactions between molecules. Imaging, in layman's terms, means "seeing" hydrogen bonds for the first time.
On November 1st, the "Science" magazine of the National Science Council of the United States formally published the results in the form of "Report", and commented on this in the column "This Week in Science" under the title of "Seeing Hydrogen Bonds" A research result. Two reviewers of Science commented on this work as "a groundbreaking discovery, truly amazing experimental measurement." "It is an outstanding and exciting work with far-reaching significance and value".
Hydrogen bonding is one of the most important and widely existing forms of intermolecular interaction in nature. One of the main accomplishers of this work, Yan Xiaohui, a researcher at the National Nanoscience Center, introduced that the history of hydrogen bond research can be traced back to the study of gaseous hydrates in the latter half of the 19th century.
In 1936, Pauling, the winner of the Nobel Prize in Chemistry, formally proposed the concept of hydrogen bonding in his book "The Essence of Chemical Bonds." For more than a century, although people have deepened their understanding of the nature of hydrogen bonds, the nature of hydrogen bonds has so far been inconclusive. Previously, the study of hydrogen bonding properties was mainly conducted by indirect analysis using X-ray diffraction, Raman spectroscopy, neutron diffraction, and the like, but hydrogen bonding has never been seen.
Yan Xiaohui said that until now, Chinese scientists have used the high resolution atomic force microscope to see the hydrogen bonds for the first time and realized the direct observation of hydrogen bonds. Dr. Leo Gross, a scientist at the IBM-Zurich Research Center in Switzerland, commented that "this is a meaningful and far-reaching research work."
One important reason that Chinese scientists can take the lead in realizing this “discovery†at the international level is to independently and independently manufacture the core component of an atomic force microscope—a high-performance qPlus force sensor. Yan Xiaohui said that Chinese scientists' continuous optimization of existing instruments and equipment has improved the stability and signal-to-noise ratio of existing equipment, making the key technical indicators of the instrument reach the “best level†in the field in the world. In addition, the Center also externally stated that: compared with the conventional spectroscopic methods (infrared, nuclear magnetic resonance, X-ray crystal diffraction, etc.) for hydrogen bond research, this research method has opened up a new experimental pathway and anticipates interactions between molecules. The mechanism research field has broad application prospects.
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