among aromatic and non-aromatic moieties, resulting in distinct emissive species with varied bandgaps. To confirm our speculation, the intra-chain interactions and the glass transition of PVLPs are investigated by solid-state nuclear magnetic resonance (NMR) and differential scanning calorimetry (DSC). Figure shows the high-resolution doublequantum/single-quantum (DQ/SQ) chemical shift correlation of PLVP-3 and PMLA/P2VP blend (w/w = 1/1) at a magic-angle-spinning rate of 12 kHz. Note that both samples have a similar monomer ratio. It is observed that there are strong autocorrelations among protons of the pyridine chemical group (peak 1). Interestingly, the DQ correlation between pyridine (peak 1) and -OCH (peak 2) was not observed in both samples, indicating the distance between these two protons was larger than about 5 Å.