Electronic excitation LUMO
h ν
spectroscopy:Photon absorption promotes an electron HOMO promotes an electron from its ground state to an excited state.
λmax = 217 nm
λ(nm)
Electronic excitation LUMO
关于文明的诗歌h ν
spectroscopy:Photon absorption promotes an electron HOMO promotes an electron from its ground state to an excited state.
absorption to organic chemists:g (absorbing functional groups)Tuning absorbance detectors in chromatography Obrving molecules on fluorescent TLC plates
Old style: Movable grating.
movable
grating期中考试试卷
light source
entrance sample light source slit
exit
slit
cell
photodiode
Light Sources:p g
deuterium lamp tungsten lamp牛奶可乐经济学
New style: Di d
static grating sample
cell
Diode array.
light source entrance
slit
No mo ing parts!
活血镇痛胶囊>扎多音字组词photodiode array (containing 100s-1000s of array elements)
脸上有红血丝•No moving parts!
Can adapt fiber optic devices to lots of applications.
All possible excitations may be obrved…
…
but intensity (allowed/
disallowedness) dictated
disallowedness)dictated
by symmetry, overlap.
disallowed
allowed
allowed
disallowed
A天亮说晚安
B
C
Bond excitations
evaluated on tables.
>春节拜年的由来
