𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Time-resolved studies of two-photon absorption processes in poly(p-phenylenevinylene)s

✍ Scribed by U. Lemmer; R. Rischer; J. Feldmann; R.F. Mahrt; J. Yang; A. Greiner; H. Bässler; E.O. Göbel; H. Heesel; H. Kurz

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
437 KB
Volume
203
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

Transient absorption spectroscopy and two-photon fluorescence techniques were used to study the nonresonant optical nonlinearities in poly(pphenylenevinylene) (PPV) and its phenyl substituted derivative (PPPV). Strong two-photon absorption with a coefficient /I in the range of 5 cm/GW was found. The temporal behavior of the two-photon absorption process in PPV and PPPV, however, is significantly different, which is attributed to the different morphology of the polymer samples. The two-photon resonance lies energetically well above the first excited state in both materials.

📜 SIMILAR VOLUMES

Conformational Relaxation of p-Phenylene
Conformational Relaxation of p-Phenylenevinylene Trimers in Solution Studied by Picosecond Time-Resolved Fluorescence
✍ Roberto E. Di Paolo; João Seixas de Melo; João Pina; Hugh D. Burrows; Jorge Morg 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 384 KB

## Abstract Two __p__‐phenylenevinylene (PV) trimers, containing 3′‐methylbutyloxyl (in MBOPV3) and 2′‐ethylhexyloxyl (in EHOPV3) side chains, are used as model compounds of PV‐based conjugated polymers (PPV) with the purpose of clarifying the origin of fast (picosecond time) components observed in

Location of the lowest even parity excit
Location of the lowest even parity excited singlet state in poly(p-phenylenevinylene) by two-photon fluorescence spectroscopy
✍ C.J. Baker; O.M. Gelsen; D.D.C. Bradley 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 407 KB

We report the two-photon fluorescence excitation spectrum of poly(pphenylenevinylene) over the energy range 1.1-2.0 eV. The onset for two-photon fluorescence excitation is at 1.3 eV with a strong peak near I.475 eV. The peak locates the energy of the lowest even parity excited singlet at 2.95 eV, so