Pillared Hybrid Solids with Access to CoordinatIVely Unsaturated Metal Sites:An AlternatIVe Strategy

摘要

Porous solids that contain accessible,CoordinatIVely unsatu-rated(open)metal sites within a rigid framework show great potential for applications in catalysis,absorption of gases(H_2 and CH_4),and small-molecule recognition,as highlighted in recent reviews.There is a growing interest to improve catalytic and gas-absorption selectIVity through the immobilization of reactIVe transition-metal centers inside highly functionalized,size-selectIVe pores.This is envisioned as an extension of the well-known catalysis mediated by zeolite solids and coordination compounds.However,only a few mixed examples of open-framework solids with access to open metal sites have been reported,including open Zn,Cu,and Tb sites in three distinct metal-oreanic frameworks.