Influence of a Spacer Group on the Nonlinear Optical Properties of π-Conjugated Compounds Kogej, T. ; Briche, M. H. ; Silbey, R. ; Marder, S. R. ; Brédas, J. L. Abstract Publication: Light Wave Manipulation Using Organic Nonlinear Optical Materials Pub Date: 2000 Bibcode: 2000lwmo.conf..205K