dipole moment

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Related to Dipole moments: Molecular dipole moment

Dipole moment

A mathematical quantity characteristic of a dipole unit equal to the product of one of its charges times the vector distance separating the charges. The dipole moment μ associated with a distribution of

electric charges qi is given by where r i is the vector to the charge qi. For systems with a net charge (for example, positive), the origin is taken at the mean position of the positive charges (and vice versa). Dipole moments have the dimensions coulomb-meters. Molecular dipole moments were previously expressed in debye units, where 1 debye = 3.336 × 10-30 C · m. See Dipole

dipole moment

[′dī‚pōl ‚mō·mənt]
(physical chemistry)
The vector sum of the bond moments in a molecule, a measure of the polarity of the molecule.
References in periodicals archive ?
Whether permittivity of a nanoparticle is well defined depends on the number of dipole moments within the particle.
Permanent C-Cl dipoles in the chlorosulfonated samples cause larger dipole moments within the polymer leading to larger dielectric permittivities than for polyethylene, as shown in Fig.
Upon application of an electric field, dipole moments, impurities, and vacancies can change positions in the lattice potential wells.
Once he gets to measuring the dipole moment, he says, "I think I can do it better.
92, 4724 (1990), Pulsed-Nozzle Fourier-Transform Microwave Spectroscopy of Laser-Vaporized Metal Oxides: Rotational Spectra and Electric Dipole Moments of YO, LaO, ZrO, and HfO.
In his own work, Dietrich searches for a phenomenon called an electric dipole moment, in which the center of positive charge of an atom lies at a different point than its center of negative charge.
The compounds had higher dipole moments and let to higher birefringence by the photopolymers and increased the holographic recording characteristics, it was demonstrated in Fig.
Table 4 collects changes of the energy of molecules with the strength of the field applied and accompanying changes of dipole moments.
Maryott, Selected values of electric dipole moments for molecules in the gas phase, National Bureau of Standards, Compilation, NSRDS-NBS 10, Washington, D.
For this research, graphene was used to write and read the electric dipole moments of an underlying ferroelectric material.
The other limiting factor of this method is that only very strong magnets with large enough dipole moments and small enough masses can reach their terminal speed within the length of the cylinder.
When it is placed in an external magnetic field, a net nuclear magnetization is created by the equilibrium difference between the magnetic dipole moments of spin populations in two different energy states.