Significant centre metallic effects on the sensing properties of two isostructural lanthanide metal-organic frameworks

Two isostructural Ln-MOFs, [H 2 N(CH 3 ) 2 ][Ln(cppa) 2 (H 2 O) 2 ] (Ln = Tb/Eu CTGU-1Tb /- 1Eu , H 2 cppa = 5-(4-carboxyphenyl)picolinic acid), were selected to investigate the effects of the different metal centre on the sensing properties. CTGU-1Eu can detect small organic molecule acetone and nitroaromatic explosives in water, whereas CTGU-1Tb can only detect explosive nitrophenol in water.