Highly Luminescent Europium-Based Heteroleptic Coordination Polymers with Phenantroline and Glutarate Ligands

Isostructural lanthanide-based coordination polymers with general chemical formula [Ln(phen)(glu)(NO3)]∞ Ln = La–Tm (except Ce and Pm) have been synthesized by hydrothermal methods (H2glu stands for glutaric acid phen 1,10-phenantroline). They crystallize in the monoclinic system P21/c (no. 14) space group. The crystal structure has solved on basis of La derivative. It can be described as superimposition molecular chains dimeric La(phen)(NO3)-La(phen)(NO3) units bridged glutarate ligands. Luminescent properties explored show that Eu derivative exhibits highest luminance observed Eu-based (85 to 105 cd·m–2). Effects dilution Eu3+ Tb3+ luminescent ions Gd3+ optically inactive are unexpected best our knowledge unprecedented. This could related different intermetallic energy-transfer mechanisms competition nonisotropic distribution lanthanide these alloys. investigation alloys [Eu1–xTbx(phen)(glu)(NO3)]∞ 0 ≤ x 1 highlights a very sizable constant luminescence whatever value, which further confirms existence strong energy transfers this family compounds. is also noticeable some based weakly emissive exhibit well defined emission spectra.