6533b856fe1ef96bd12b24c8
RESEARCH PRODUCT
Monodisperse Dialkoxy-Substituted Oligo(phenyleneethenylene)s
Herbert MeierIsabella BrehmUlf StalmachHeinz Kolshornsubject
CrystallographyChain lengthChemistryOrganic ChemistryBathochromic shiftDispersityPolymer chemistryExtrapolationGeneral ChemistryPhysical and Theoretical ChemistryAbsorption (chemistry)Conjugated systemExponential functiondescription
Individual but connected synthetic routes for the preparation of the all-E-configured 2,5-dipropoxy-substituted oligo(1,4-phenyleneethenylene)s 1a–g were developed. An increasing number of conjugated stilbene units from n = 1 to n = 11 led to a convergent bathochromic shift (Δλ = λ∞ − λ1 = 127 nm) in the UV/Vis absorption. An exponential function for the convergence of the absorption energies (wavelengths) in conjugated systems is proposed. By a simple extrapolation of this function the effective chain length may be determined.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-01-25 | Liebigs Annalen |