https://commons.ufh.ac.za/vital/access/manager/Index en-us 5 https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42024 Wed 12 May 2021 14:54:44 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42133 Wed 12 May 2021 14:36:35 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42196 Wed 12 May 2021 14:25:43 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42021 Wed 12 May 2021 14:18:43 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42179 Wed 12 May 2021 14:02:30 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42200 Wed 12 May 2021 13:53:49 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42108 3.76 × 10 − 10 ( 4a ) > 3.52 × 10 − 10 ( 4c ) > 2.29 × 10 − 10 ( 3c ) > 1.68 × 10 − 10 ( 3a ) > 1.65 × 10 − 10 ( 3b ) mW - 1 . The 휷 values trend of synthesized Pc complexes show that the asymmetrical A 3 B type metal free, cobalt and zinc Pc complexes ( 4a , 4b and 4c ) have larger 휷 values as compared to the octa - substituted symmetrical metal free, cobalt and zinc Pc complexes ( 3a , 3b and 3c ) which is attributed to the low symmetry of the Pc complexes. The five - level model rate equations were used to determine the two photon absorption, excited state absorption and ground state absorption cross sections of the synthesized complexes. The z inc A 3 B type asymmetrical Pc complexes gave the largest two photon absorption and 휎 푒 / 휎 푔 ratio values. This Pc complex could be used in future work to enhance the nonlinear response further by introducing nanomaterials and converting the Pc complex to a binuclear Pc. This work also reports on the density functional theory (DFT) calculations o f dipolar/octupolar contributions in order to study the first order hyperpolarizability of the synthesized Pc complexes.]]> Wed 12 May 2021 13:45:11 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42199 Thu 13 Jul 2023 12:40:08 SAST ]]>