A novel structured cadmium complex based on barbiturate ligand has been synthesized at room temperature by gel diffusion technique. The prepared crystals were characterised by FTIR, PXRD, thermogravimetric and single crystal X-ray diffraction analysis. SCXRD analysis reveals that the complex belongs to orthorhombic crystal structure with space group Ibam. The optical properties were studied from UV-Visible and photoluminescence spectra. The band gap of the CdB crystals was found to be 3 eV by tauc's plot and the corresponding refractive index obtained is 1.244. The crystal shows broad emission than that of its ligand (BA) in the entire visible region. The color corresponding to maximum emission of both ligand and CdB crystals were indicated by CIE chromaticity diagram. The response of CdB crystal against applied electric field is characterised by dielectric measurements. The values of penn gap and Fermi energies were calculated. The antimicrobial activities of the complex CdB against various bacteria have been investigated and then compared it with the corresponding ligand (BA). The results showed that the complex had stronger antibacterial activities than the ligand. © 2022