To form any porous solid requires payment of an energetic penalty to create voids through either strong bonds or many weak interactions working in concert. Here, we present a porous solid that is composed, after pore activation, of 27 wt % water and sustained by charge-assisted hydrogen bonds between hexaaquachromium(III) cations and organophosphonate anions. The network forms a pillared layered motif including guest solvents, as confirmed crystallographically. Although aquo ligands are an integral part of the hydrogen-bonding network that sustains the pores, activation under high vacuum is possible, and the network demonstrates reversible CO₂ sorption. The stability of the network is attributed to the inertness of the octahedral d³ Cr(III) center in combination with high degrees of complementarity and cooperativity of hydrogen bonds. The sub-nanometer pores are guest selective on the basis of size, shape, and chemical functionality.

要形成任何多孔固体，都需要付出高昂的代价，才能通过牢固的键合或许多弱相互作用共同产生空隙。在这里，我们介绍了一种多孔固体，该多孔固体在孔活化后由27 wt％的水组成，并由六水合铬（III）阳离子和有机膦酸根阴离子之间的电荷辅助氢键维持。该网络形成柱状分层的基序，包括客体溶剂，如通过晶体学证实的。尽管水族配体是维持孔的氢键网络的组成部分，但在高真空下活化是可能的，并且该网络显示出可逆的CO ₂吸附。网络的稳定性归因于八面体d ³的惰性Cr（III）中心与氢键的高度互补性和协同性结合在一起。根据尺寸，形状和化学功能，亚纳米孔是客体选择性的。