Exploring key electronic and non-linear optical amplitute with bilateral intramolecular charge transfer into thieno[3,2-b]thiophene-based compounds: a DFT approach - Khalid, Muhammad; Arshad, Memoona; Haroon, Muhammad; Braga, Ataualpa Albert Carmo; Alhokbany, Norah (RSC Advances, 2025)