Tunable emission in poly(4-vinylpyridine)-based gel

E. Vaganova*, S. Yitzchaik

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We have discovered a new class of smart-gels, poly(4-vinylpyridine) (PVPy) swollen with pyridine (Py), that following photoexcitation (395, 455, 557 nm) emits three independent colors: blue, green, and red (477, 527, 585 nm, respectively). These excitation wavelengths also induced large reversible changes in pH and electrical conductivity. The primary photoexcitation paths within this photo-active gel are singlet-excitons. The origin of this phenomenon is attributed to the combined properties of weak coupling via hydrogen-bonding and high polarizability. Our preliminary model suggests, that C-H...N based Py associates are formed during the gelation process. Photoexcitation leads to proton transfer within three different kinds of assemblies and to a solid-state-like electronic behavior of the gel. This system, i.e. a photoconducting transparent organic gel with multiple color emission, is very attractive for a wide range of promising applications in the field of optoelectronic devices such as organic LED's and 3D holography.

Original languageAmerican English
Pages (from-to)636-641
Number of pages6
JournalActa Polymerica
Issue number10-11
StatePublished - Nov 1998


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