Vibrational Spectral Studies of Pure and Doped DTGS Crystals

摘要

Single crystals of deuterated triglycine sulfate (DTGS), DTGS doped with deuterated phosphoric acid (DTGS_(0.8)P_(0.2)) [DTGSP], and L-alanine (DTGS_(0.8)P_(0.2)—LA _{(2 gm)}) [DTGSP-LA] are grown from deuterated water solution containing glycine, D₂SO₄, D3PO4, and L-alanine. Vibrational spectroscopic analysis has been under taken to examine the con?guration of glycinium ion formation and the changes in the nature of hydrogen bonding due to the partial substitution of SO₄^2- by PO₄^3-. Fourier Transform Infrared (FT-IR) and FT-Raman analysis indicates the presence of both zwitter and glyciniumions in the doped DTGS crystals, which is due to the low incorporation of dopants into the crystal lattice, which supports Hoshino’s theory of spontaneous polarization reversal. Nuclear magnetic resonance studies (¹H, ¹³C, ³¹P) revealed the possible bond formation during the formation of the compound.