Crystal growth, structural, optical, spectral and thermal studies of tris(l-phenylalanine)l-phenylalaninium nitrate: A new organic nonlinear optical material

► The chemical structure of crystals was established by FT-NMR technique. ► SHG efficiency of TPLPN is 0.569 times than that of KDP crystal. ► The optical cut-off wave length for this crystal was observed at 250 nm. ► TPLPN crystal is a potential candidate for device fabrication.