文档介绍：应用光谱-(andsothedifferenceinenergybetweentheselevels)havediscretevalues(quanta).(ν=1/λ).=hνorΔE=hc/λorΔE=hcν,wherehisPlanck’,therefore,proportionaltothefrequencyorwavenumber,,vibrationaltransitioncorrespondtowavelengthsintheIRregion,andelectronictransitiontotheUV-(doublebondorring)-Visspectroscopyinvolvesthepromotionofelectronsfrombondingornon-bondingorbitalstoanti-(A)atanywavelengthiscalculatedfromtheintensityoflighttransmittedthroughasolutionofthesampleinsolvent(paredtotheintensityoflighttransmittedthroughthesolventalone(I0):A=log10(I0/I).(ε)ofanabsorptionmaximum(λmax)-Lambertslawtorelateabsorbance(A)tothemolarabsorptivity(ε),theconcentration(c,mol·L-1)andthepathlength(l,cm):A=,whicharisefromnon-bondingandπ-;thelongerthechromophore,,-electronsorlonepairsofelectrons,