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Highly dipoiar non-linear optical chromophores withabsorption typically in the range of 350-500 nm have been synthesised by the reactions of amines with tetracyanoquinodimethane (TCNQ). These materials show interesting fluorescence properties with the emission strongly dependent on the host environment One of the advantages of these materials is the large figure of merit (43), which is calculated to be -765 x 10 -48 esu, allowing large non-linear optical coefficients to be obtained. Guest-host polymer films of these materials have been corona poled using a constant current corona Iriode. These materials are highly dipoiar which leads to the formation of aggregates within the doped polymer films. Studies of the second order non-linearities using second harmonic generation (SHG) have revealed the presence of such aggregation. The magnitude of the SHG that can be obtained from such systems is therefore severely limited by this aggregation. This phenomenon was then confirmed with optical spectroscopy and electric field induced second harmonic generation (EFISH) studies.