https://vital.seals.ac.za/vital/access/manager/Index en-us 5 https://vital.seals.ac.za/vital/access/manager/Repository/vital:28205 Wed 12 May 2021 20:52:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29202 Wed 12 May 2021 20:11:15 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29116 Wed 12 May 2021 19:14:06 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:41485 Wed 12 May 2021 15:04:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:42170 Wed 12 May 2021 14:54:17 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:42606 Wed 12 May 2021 13:49:58 SAST ]]> https://vital.seals.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://vital.seals.ac.za/vital/access/manager/Repository/vital:37891 Thu 13 May 2021 05:55:46 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28047 Thu 13 May 2021 05:50:41 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:38610 Thu 13 May 2021 05:04:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:30125 Thu 13 May 2021 01:18:46 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:26875 Thu 13 May 2021 01:03:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:73431 Sun 16 Jun 2024 16:22:42 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:73448 Mon 17 Jun 2024 05:22:37 SAST ]]>