Ogunsipe, A.O., and O.S. Opeolu. “Ground- and Excited-State Dipole Moments of Magnesium Phthalocyanine from Solvatochromic Shifts and Solvent Polarity Functions”. Journal of Chemical Society of Nigeria 45, no. 2 (March 30, 2020). Accessed September 19, 2020. http://journals.chemsociety.org.ng/index.php/jcsn/article/view/442.