Synthesis and structural, spectroscopic and nonlinear optical measurements of graphene oxide and its composites with metal and metal free porphyrins was written by Bala Murali Krishna, M.;Venkatramaiah, N.;Venkatesan, R.;Narayana Rao, D.. And the article was included in Journal of Materials Chemistry in 2012.Electric Literature of C47H36N4O The following contents are mentioned in the article:
In this paper we present the structure and spectroscopic, photophys. and nonlinear optical studies of covalently functionalized novel graphene oxide-[Cu, Zn, Sn, H2 (metal free), VO] porphyrin composites. The composites were characterized by Field Enhanced SEM (FE-SEM), micro-Raman, optical absorption, FTIR spectroscopy, steady-state and time-resolved fluorescence spectroscopy techniques. The composites exhibit strong fluorescence quenching, suggesting strong electronic interactions between the porphyrin and graphene oxide mols. Nonlinear optical absorption (NLA) studies of graphene oxide-porphyrin composites were investigated using the Z-scan technique at 532 and 800 nm with nanosecond (ns) and femtosecond (fs) laser pulses. Composites show strong two-photon absorption (TPA) as well as excited state absorption (ESA) leading to reverse saturable absorption (RSA) behavior in the ns regime and saturable absorption (SA) behavior was observed in fs regime. The metal-free porphyrin-graphene oxide (GO) composite shows significant nonlinear absorption behavior as well as highest fluorescence quenching behavior compared to other GO-porphyrin composites. We further observed the enhanced figure of merit (FOM) values for composites in comparison with individual mols. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Electric Literature of C47H36N4O).
4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligand design occupies a central place in organic synthesis and catalysis. The ligands are electron-rich and highly tunable to provide catalyst systems with a diverse scope, high stability, and reactivity.Electric Literature of C47H36N4O
Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI