Luminescent sensing of a new 8-connected topological metal-organic framework.

A new metal–organic framework having formula {[Cd 3 (H 2 O)(L) 2 ][Cd(im) 3 (H 2 O) 2 ]·3 H 2 O} (H 4 L = 5-bis(4-carbonylbenzyl)aminoisophthalic acid and im = imidazole) ( 1 ) has been synthesized. X-ray investigation reveals that 1 is rare 4,4,8-connected (4 6 )(4 5 · 6)(4 11 · 6 15 · 8 2 ) topology. The present work indicates that 1 could be a prospective candidate for developing novel luminescence sensors for the selective sensing of nitrobenzene which can be used as a precursor for explosives. Furthermore, the luminescent property of 1 in different solvents analytes as well as nitrobenzene have been investigated and the observed quenching in fluorescence have been corroborated by theoretical calculations. [ABSTRACT FROM AUTHOR]