An anionic Na(i)–organic framework platform: separation of organic dyes and post-modification for highly sensitive detection of picric acid

Abstract

A cage-based anionic Na(I)–organic framework with a unique Na₉ cluster-based secondary building unit and a cage-in-cage structure was constructed. The selective separation of dyes with different charges and sizes was investigated. Furthermore, the Rh6G@MOF composite could be applied as a recyclable fluorescent sensor for detecting picric acid (PA) with high sensitivity and selectivity.