Observation of divergent La3+ ion dilute effect in two series of 3-D fluorescent lanthanide-MOFs-based molecular alloys RExLa1−x-EBTC (RE3+=Eu3+ or Tb3+; EBTC4−=1,1′-ethynebenzene-3,3′,5,5′-etracarboxylate)

Two series of 3-D fluorescent lanthanide-MOFs-based molecular alloys RExLa1−x-EBTC (RE3+=Eu3+ or Tb3+; EBTC4−=1,1′-ethynebenzene-3,3′,5,5′-tetracarboxylate) have been successfully prepared by mixing Eu3+/Tb3+ and La3+ salts with the desired molar ratio in the starting material and showed photoluminescence property with divergent La3+ ion dilute effect.