Supramolecular porphyrin as an improved photocatalyst for chloroform decomposition.

In this work, the outlying decoration of the free-base meso -(4-tetra) pyridyl porphyrin (H 2 TPyP) with the RuCl(dppb)(5,5'-Me-bipy) ruthenium complex (here named Supra-H 2 TPyP) is observed as an improved molecular photocatalyst for dye-mediated chloroform (CHCl 3 ) decomposition via one-photon absorption operating in the visible spectral range (532 nm and 645 nm). Supra-H 2 TPyP offers a better option for CHCl 3 photodecomposition when compared to the same process mediated by pristine H 2 TPyP, which requires either excited-state- or UV absorption. The chloroform photodecomposition rates for Supra-H 2 TPyP as well as its excitation mechanisms are explored as a function of distinct laser irradiation conditions.