A family of TPA derivatives, TPAPyAP, TPAPyBP and TPAPyBPN, shows progressively redshifted emission in toluene as a function of the increasing number of nitrogen atoms in the heterocyclic pyrazine-based acceptors. All three compounds exhibit a spectral response to the detection of ZnCl2 in toluene, with the most notable being for TPAPyBP, where the emission rapidly changed from green (lPL=550 nm) to deep red (lPL=680 nm), which is distinct from the typical response of most Zn 2+ or ZnCl2 sensors that only rely on changes in emission intensity. We also investigated the potential of these compounds as emitters in OLEDs. Both TPAPyBP and TPAPyBPN emit in the deep red in PPT, while TPAPyAP exhibits a smaller red-shift from green emission in CBP to yellow emission in PPT compared to the other two compounds. The OLEDs showed moderate efficiencies, with the device with TPAPyBPN doped in PPT emitting at lEL= 657 nm and showing an EQEmax 12.5%. This electroluminescence was red-shifted by 61 nm compared to device the with CBP as the host (λEL= 596 nm, EQEmax = 13.6%), a reflection of the impact of solid-state solvatochromism.