molecular vibration


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molecular vibration

[mə′lek·yə·lər vī′brā·shən]
(physical chemistry)
The theory that all atoms within a molecule are in continuous motion, vibrating at definite frequencies specific to the molecular structure as a whole as well as to groups of atoms within the molecule; the basis of spectroscopic analysis.
References in periodicals archive ?
This bold vision, which builds on the fundamentals of light-matter interaction (science) and converges toward the on-chip integration in a silicon-compatible chip (technology), completely surpasses any previous technological paradigms related to the measurement of thz molecular vibration as well as its possible manipulation.
where [mathematical expression not reproducible] arrowed in Figure 4 is the experimental peak assigned to molecular vibration resulting from the change of bond angle of CCC in aromatic ring attribute to BPA-PES [13].; [mathematical expression not reproducible] is the experimental peak assigned to ring breathing vibration of 1,3-displacement of isophthalate in both-PES.
According to Figure 4, the peaks at 350 nm to 420 nm confirm the molecular vibration of oleo-gum-resin of olibanum [97]; the peak found near of 390 nm with another prominent peak at 480 nm confirms the molecular vibration of myrrh extract [98]; the peak found at 350 nm with vibration extending to another peak at 450 nm confirms molecular vibration of benzoin resin [99]; the intensity of spectra obtained at wavelengths 350 nm is typical for the crystalline structure of anatase + rutile (P25) and titanium dioxide (Ti[O.sub.2]) [100]; the spectra showing intensity at wavelengths >300 nm typical for diametric and/or oligomeric species confirm the molecular vibration of Mo[O.sub.3] [101].
CARS microscopy generally employs two highly synchronized picosecond mode-locked lasers to induce coherent molecular vibrations by adjusting the frequency difference of these excitation lasers ([[omega].sub.1] and [[omega].sub.2]) at a molecular vibration (Q = [[omega].sub.1]-[[omega].sub.2]).
It should be emphasized that the molecular vibration is started from the HOOP torsion of phenyl ring, corresponding to the change of dihedral angle [theta].
Much science involves low temperatures-with less molecular vibration it is possible to 'see' more clearly inside material structures or get sharper signals from detectors.
1913) was the first to harness this molecular vibration to time-keeping purposes.
The spectrums in time are normalized with respect to a reference and strong peaks that reduced their height in time due to consumption of bonds particular to that molecular vibration were used as monitoring technique.
To do this, the team used STM electrons with precise energies that excited only one of two types of molecular vibration. That, in turn, primed individual molecules to react in specific ways.
The frequency, or wavelength, of the nonlinear signal provides the chemical makeup of a sample based on its molecular vibrations, without the need to add any additional fluorescent labels or chemicals.
There is also "the possibility of new opto-mechanical data storage devices, allowing information to be written and read by light and stored in the form of molecular vibrations," the statement added.
He covers molecular symmetry and the symmetry groups, crystal field theory, symmetry and molecular orbitals theory, the symmetry of molecular vibrations and selection rules, and basic optical spectroscopic techniques.

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