A 4-connected anionic metal-organic nanotube constructed from indium isophthalate

Here, a very unusual metal-organic nanotubular structure, [In(1,3-BDC)(2)](-) (1,3-BDC = 1,3-benzenedicarboxylate) based on the 4-connected topology is reported. While 4-connected structures are widely sought after, such one-dimensional 4-connected tubular structures are extremely rare even though two-and three-dimensional 4-connected materials are common.