Hydrothermal reactions of lanthanide nitrates with glyphosate have resulted three new isostructural 3D lanthanide organic frameworks, Ln(NO3)(H2L) [Ln = Eu (1), Tb (2), Gd (3); H4L = 2,5-dioxo-1,4-piperazinylbis-(methylphosphonic) acid], with good yields, where H4L as a new ligand was formed via in situ cyclodehydration of original ligand glyphosates during the hydrothermal reaction. The compounds were thoroughly characterized by IR, UV-vis, elemental analysis, single crystal X-ray diffraction analysis, powder X-ray diffraction analysis, and thermogravimetric/differential thermal analysis (TG-DTA). Three compounds display 3D 6,6-connected open frameworks with 4(13).6(2) topology possessing ID channels in which NO3- anions act as troglodytes by chelating Ln(3+) centers. The TG-DTA study of the compounds showed remarkable thermal stability up to 380 degrees C. Under room temperature UV-light irradiation, the Eu3+ and Tb3+ compounds showed the corresponding characteristic Ln(3+) intra 4f(1) emission peaks. The triplet energy level (21882 cm(-1)) of the ligand (H4L) was determined from the emission spectrum of its Gd3+ compound at 77 K. The emission lifetimes (1.54 ms of D-5(0) for compound 1 and 1.98 ms of D-5(4) for compound 2) and absolute emission quantum yields (10.1% for compound I and 5.9% for compound 2) were also determined.