The cover picture shows the crystal structure of a three-dimensional microporous coordination polymer with two-fold interpenetrating architecture. The photograph of a pen nib suggests that this material could behave as a selective luminescent detector for Fe
3+ ions. More details can be found in the Full Paper by
Miao Du et al. on
page 857 in Issue 8, 2016 (DOI:
10.1002/cplu.201600155).