The Gore-Tex® effect in externally hydrophobic Metal–Organic Frameworks†
Abstract
UiO-66-NH2 ([Zr6O4(OH)4(NH2-bdc)], NH2-bdc = 2-aminoterephthalic acid) was post-synthetically modified using four strategies to improve its external hydrophobicity. The modified MOFs exhibited increased hydrophobicity to water droplets, but their internal hydrophobicity remained unchanged. This highlights a disconnect between hydrophobicity towards vapour and liquid water, referred to as the Gore-Tex® effect.