AP’s Science Week visit has become an annual event in Aquinas and one which is looked forward to by staff and pupils alike. This year’s talk did not disappoint as he spoke to year 10 and 13 pupils about his work on logical molecules. This time AP described his work on designing and constructing supermolecules which can gather or process information. He described how fluorescent molecular sensors can gather information about atomic or molecular behaviour from environments down to nanometre dimensions and how this has helped to establish fluorescent PET (photoinduced electron transfer) sensing. This design principle has already led to successes in targeting several chemical species crucial in biological and medical contexts. Once again we are very grateful to Professor Desilva for generously giving up his time to share his expertise with our young people.