The synthetic origin of nanodimensionand its role on the luminescence properties of carbon nanodots, in particular, citric acid derived ones, remain an enigma to date.1We have identifiedthat the citrazinic acid alone builds a nanocarbon structure upon incubation in dimethyl formamide at room temperature. The emission properties of incubated fluorophore resemble that of a nanodot. The dispersion of the H-bonded cluster’s size originated from citrazinic acid only is the cause of excitation-dependent emission. We have shownthat the steric hindrance caused by the presence of alkyl chain of butyl amine restricts such dispersions, resulting in excitation-independent emission, a molecular behavior.1We have made attempt to undersatndthe photoluminescence dynamics of so-calleddoped nanodotin solid polymer matrix and that even in the presence of silver nanoparticle. Surprisingly, it has been observed that the nanodot exhibits anomalous behavior metallic nanoparticle. Wealsoidentify the existence of blue-, green-, and red-emissive fluorophores in a product obtained from solvothermal reaction. The red luminescence has been utilizedfor logic-gate operation for achiving molecule-on-a-Chipapplications. Nanodot-embedded PVA/PVP film has been used for down-convesrsionof energyto White Light usingGaN UV-LED Chip.2The mechanism of white light emission is attributed to effective energy transfer among fluorophores.