Accession Number : ADA293526
Title : Molecular Motion of Phosphazene-Bound NLO Chromophores.
Descriptive Note : Technical rept.,
Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF CHEMISTRY
Personal Author(s) : Allcock, Harry R. ; Cameron, Charles E. ; Skloss, Timothy W. ; Taylor-Meyers, Sharon ; Wynne, Kenneth J.
PDF Url : ADA293526
Report Date : 17 APR 1995
Pagination or Media Count : 38
Abstract : The behavior of NLO groups linked to a polyphosphazene chain was studied by solid state NMR spectroscopy. A series of poly(organophosphazenes) was prepared and characterized. Variable-temperature solid state 13C NMR spectra indicated that the use of a longer spacer group between the polymer backbone and the aromatic portion of the NLO side group lowered the temperature at which chromophore motion is quenched. This implied that the use of such structures may accelerate the randomization of NLO side group orientation at ambient temperatures following poling. This behavior was mirrored in the solid state variable-temperature 31p NMR spectra, which suggested that side chain and polymer backbone may be coupled. jg
Descriptors : *CHROMOPHORES, *POLYMERS, *MOTION, *NONLINEAR OPTICS, *MOLECULAR PROPERTIES, *PHOSPHAZENE, NUCLEAR MAGNETIC RESONANCE, ELECTROOPTICS, SPECTROSCOPY, QUENCHING, CHEMICAL BONDS, CHAINS, ORGANIC COMPOUNDS, SIDES, LINKAGES, SOLID STATE PHYSICS, SPACERS.
Subject Categories : Organic Chemistry
Atomic and Molecular Physics and Spectroscopy
Distribution Statement : APPROVED FOR PUBLIC RELEASE