@article{2928333, title = "A lanthanide-based helicate coordination polymer derived from a rigid monodentate organic bridge synthesized in the solid state", author = "Dejan-Krešimir Bučar and Giannis S. Papaefstathiou and Tamara D. Hamilton and Leonard R. MacGillivray", journal = "New Journal of Chemistry", year = "2008", volume = "32", number = "5", pages = "797", publisher = "Royal Society of Chemistry (RSC)", issn = "1144-0546, 1369-9261", doi = "10.1039/b800878g", abstract = "Tetratopic rctt-tetrakis(4-pyridyl)cyclobutane acts as an angular bifunctional ligand that yields a single-stranded helicate coordination polymer based on a Ln(III) ion." }