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We report the design and synthesis of volatile europium β-diketonate Eu(dmh)3phen organic hybrid complex by precipitation technique. A series of complexes were synthesized for different pH values, ranging between 8.0 and 6.0 maintaining stoichiometric ratio. Among all the synthesized complexes, Eu(dmh)3phen with pH 7 exhibits red intense emission at 613 nm with a sharp spectral bandwidth of 5 nm when excited at a wavelength of 372nm,infering that the synthesized complex is pH sensitive. This complex is further assessed for structural, thermal and luminescence behavior in various solvents. X-ray diffractogram reveals its crystalline nature and FTIR confirms the complete formation of the complex revealing the presence of TTA and bipy structure in the metal complex. TGA/DTA exhibits good thermal stability, which is highly essential for fabricating organic light emitting diodes (OLEDs) for solid state lighting. Hypsochromic shift was observed in the optical absorption spectra of Eu(dmh)3phen, when the solvent is changed from basic to acidic media.

Structural and Optical Investigation of Novel Europium Hybrid Organic Complex for OLEDs and Solid State Lighting