The incorporation of cobalt, nickel, copper, and oxovanadium (IV) into nonpolar 5, 10, 15, 20- tetraphenyl-21 H, 23 H-porphyrin (H2TPP) occurred with their sulfates, nitrates, and chlorides in high-temperature water. The yield of metalloporphyrin significantly increased with increasing temperature for cobalt, nickel, and copper sulfates from 473 to 673 K, which means that the high temperature region was preferred for the incorporation of metals into ...