First theoretical framework of triphenylamine–dicyanovinylene-based Nonlinear Optical Dyes: structural modification of π-linkers - Khan, Muhammad Usman; Khalid, Muhammad; Ibrahim, Muhammad; Braga, Ataualpa Albert Carmo; Safdar, Muhammad; Al-Saadi, Abdulaziz A; Janjua, Muhammad Ramzan Saeed Ashraf (Journal of Physical Chemistry, 2018)