Synthesis, crystal structure analysis, spectral IR, UV–Vis, NMR assessments, electronic and nonlinear optical properties of potent quinoline based derivatives: Interplay of experimental and DFT study - khalid, Muhammad; Ullah, Malik Aman; Adeel, Muhammad; Khan, Muhammad Usman; Tahir, Muhammad Nawaz; Braga, Ataualpa Albert Carmo (Journal of Saudi Chemical Society, 2019)