title: Synthesis, crystal structure and characterization of a new optical di-lithium di-phthalate single crystals.
abstract: Single crystals of a new alkali phthalic complex salt of di-lithium di-phthalate (C32H30Li4O21) (DLDP) were grown by slow evaporation of an aqueous solution at room temperature. The compound crystallizes in a monoclinic system with a centrosymmetric space group having the unit cell parameters; a=17.037(5) Å, b=5.134(5) Å, and c=21.398(5) Å and α=90.000(5)°, β=113.195(5)°, and γ=90.000(5)° with Z=2. The structure has been refined up to a R-value of 0.0828 from 26,248 observed reflections using a three-dimensional X-ray diffraction intensity data. The vibrational structure of the compound confirms the presence of various functional groups in the molecule. Mass spectrometric analysis provides the molecular weight of the compound and possible ways of fragmentations occurring in the compound. Thermal stability of the crystal was also studied by simultaneous TGA/DTA analyses. The UV-VIS-NIR spectrum was recorded to study the transmittance properties of the grown crystals. The obtained results are discussed in detail.
authors.affiliation: Department of Physics, Sri Venkateshawaraa College of Engineering & Technology, Ariyur 605102, India.
authors.forename: D
authors.initials: D
authors.lastname: Saravanan
authors.affiliation: Department of Physics, University College of Engineering Arni, Anna University Chennai, Arni 632317, India.
authors.forename: G
authors.initials: G
authors.lastname: Ramesh Kumar
authors.affiliation: Department of Physics, Vel Tech University, Avadi, Chennai 600 062, India.
authors.forename: S
authors.initials: S
authors.lastname: Gokul Raj
authors.affiliation: Department of Physics, Vel Tech University, Avadi, Chennai 600 062, India. Electronic address: smoh14@rediffmail.com.
authors.forename: S
authors.initials: S
authors.lastname: Mohan
authors.affiliation: Department of Physics, University College of Engineering Kanchipuram, Anna University Chennai, Kanchipuram 631552, India.
authors.forename: B
authors.initials: B
authors.lastname: Sivakumar
keywords: Di-lithium diphthalate; FT-IR; Hydrogen bonds; Mass spectrometry; Single crystal; UV–Vis–NIR