A novel quaternary dinuclear luminescent terbium complex Tb2(phth)2(Hphth)2(phen)2(H2O)4: hydrothermal synthesis, crystal structure and photophysics

Assembling potassium acid phthalate (KHphth), 1,10-phenanthroline (phen) and terbium nitrate, a novel quaternary dinuclear terbium complex with formula Tb2(phth)2(Hphth)2(phen)2(H2O)4 (H2phth ¼ phthalic acid, phen ¼ 1,10-phenanthroline) has been firstly synthesized by hydrothermal process. X-ray analysis reveals that it forms dimeric structure and the two central terbium ions have the same coordination environment. The title complex crystallizes in the triclinic system, space group P-1; with lattice parameters a ¼ 10:149ð5Þ A ° , b ¼ 10:730ð5Þ A ° , c ¼ 11:906ð5Þ A ° , a ¼ 90:427ð6Þ8; b ¼ 99:474ð6Þ8; g ¼ 101:088ð6Þ8; Fð000Þ ¼ 696; GOF ¼ 0:931; R1 ¼ 0:0308; wR2 ¼ 0:0606 and Z ¼ 1: The photophysical properties have been studied with ultraviolet absorption spectrum, excitation and emission spectrum, which exhibit strong green emission. q 2004 Elsevier B.V. All rights reserved