title: Electronic properties of neutral dyes in the channels of zeolite L: a combined spectroscopic and quantum chemical study.
abstract: Three low molecular weight model compounds for poly(phenylene-ethynylene)s were inserted into the channels of zeolite L by using gas phase insertion. The absorption and emission spectra in solution and dye/zeolite L are reported. Two compounds show emission properties in zeolite L comparable to that in solution. In contrast, the bipyridine containing compound shows a red shift toward longer excitation wavelengths. Matrix rank analysis of the emission spectra gave three contributing species. Quantum chemical calculations provide different conformations depending on the Si/Al distribution of the framework and the extraframework cations and attached protons.
authors.affiliation: Institute of Physical Chemistry, Friedrich-Schiller University Jena, Lessing St. 10, D-07743 Jena, Germany. beate.bussemer@uni-jena.de
authors.forename: Beate
authors.initials: B
authors.lastname: Bussemer
authors.forename: Dirk
authors.initials: D
authors.lastname: Munsel
authors.forename: Heike
authors.initials: H
authors.lastname: Wünscher
authors.forename: Gerhard J
authors.initials: GJ
authors.lastname: Mohr
authors.forename: Ulrich-Walter
authors.initials: UW
authors.lastname: Grummt