title: Optical, thermal and dielectric properties of Sr(II)-doped bis(thiourea)zinc(II) chloride crystals.
abstract: The influence of strontium doping on the properties of bis(thiourea)zinc(II) chloride (BTZC) crystals has been described. The reduction in the intensity observed in powder X-ray diffraction of doped specimen and slight shifts in vibrational frequencies confirm the lattice stress as a result of doping. The incorporation of Sr(II) into the crystal lattice was confirmed by energy dispersive X-ray spectroscopy (EDS). Surface morphological changes due to doping of the alkaline earth metal are observed by scanning electron microscopy (SEM). The crystal is transparent in the entire visible region having a lower optical cut-off at ~308 nm with a band gap energy of 4.06 eV. The DSC studies reveal the purity of the materials and no decomposition is observed up to the melting point. Dielectric studies show that the isovalent ion Sr(II)-doping altered the dielectric properties of the host crystal.
authors.affiliation: Department of Chemistry, Annamalai University, Annamalainagar 608 002, India.
authors.forename: K
authors.initials: K
authors.lastname: Muthu
authors.forename: M
authors.initials: M
authors.lastname: Rajasekar
authors.forename: K
authors.initials: K
authors.lastname: Meena
authors.forename: C K
authors.initials: CK
authors.lastname: Mahadevan
authors.forename: S P
authors.initials: SP
authors.lastname: Meenakshisundaram
mesh_terms: D000042:Absorption; D002152:Calorimetry, Differential Scanning; D003460:Crystallization; D004560:Electricity; D008855:Microscopy, Electron, Scanning; D055620:Optical Phenomena; D009942:Organometallic Compounds / Q000737:chemistry*; D011208:Powders; D013052:Spectrometry, X-Ray Emission; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013324:Strontium / Q000737:chemistry*; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: D009942:Organometallic Compounds; D011208:Powders; C568105:bis(thiourea)zinc(II) chloride; D013324:Strontium