
A nanogel that helps a porphyrin sense copper in the presence of zinc
Porphyrins are among nature’s most important pigments. The name comes from the Greek word for purple, and the molecules are four small nitrogen-containing rings joined into a larger ring, with room at the centre for a metal atom. In the haemoglobin of blood that atom is iron; in the chlorophyll of plants it is magnesium […]








