Amino Acid‐Derived Dibutyltin(IV) Schiff Base Compounds as Sensitizers for Eu ³⁺ for White‐Emitting LEDs

This work includes the one‐pot synthesis of dibutyltin(IV) compounds 1 and 2 from dibutyltin oxide, 2‐hydroxy‐1‐naphthaldehyde and an L‐amino acid (L‐isoleucine for 1 and L‐glutamine for 2 ). Both compounds have been characterized by elemental analysis, single‐crystal X‐ray diffraction (SC‐XRD), spectroscopic techniques, and mass spectrometry. Photophysical studies revealed that the emission response of 1 and 2 can be tuned to generate white light by integrating Eu ³⁺ ions. Notably, upon addition of Eu ³⁺ the color shifts from blue to light pink in case of compound 1 (CIE coordinates: x  = 0.38, y  = 0.23, and CRI 28%) and from blue to white light (CIE coordinates: x  = 0.29, y  = 0.30, and CRI 86%) in case of compound 2 . The integrated compounds involve the transfer of absorbed energy from the organotin(IV) compounds to the excited states of Eu ³⁺ , which in turn emits the energy to acquire various ground statesand thus makes them single‐molecule emitters for WLEDs. The practical application of these compounds was tested by coating blue LED bulbs with compound 2 , integrated with Eu ³⁺ , which then produces white light. These findings contribute to development of integrated organotin(IV) materials as promising candidates for coating LEDs for next‐generation stable and efficient lighting applications.