 This study developed a new method to control the distribution of molecules in a porous material. By using mixed linkers, the researchers were able to create a synthetic strategy that allowed them to control the positioning of molecules within the material. This enabled them to produce a material that could respond to light by switching between two different forms. The material was also found to be highly stable and could be used for a variety of applications such as inkless printing and water harvesting. This article was authored by Gobinda Das, Theomuagun Prakasam, New Alcatheb, and others.