Surface-assisted dehydrogenative homocoupling of porphine molecules - Wiengarten, A.; Seufert, K.; Auwärter, W.; Ecija, D.; Diller, K.; Allegretti, F.; Bischoff, F.; Fischer, S.; Duncan, D.A.; Papageorgiou, A.C.; Klappenberger, F.; Acres, R.G.; et al. (Journal of the American Chemical Society, 2014)