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7823317 
Journal Article 
Potassium phthalocyanine, KPc: One-dimensional molecular stacks bridged by K+ ions 
Choi, JinY; Kim, MJin; Kim, JooHee; Kim, SH; Ko, HKyu; Lim, JS; Oh, YT; Chung, JaeJ; Yoo, HSik; Lee, JTae; Margadonna, S; Prassides, K; Iwasa, Y; Taguchi, Y; Craciun, MF; Rogge, S; Morpurgo, AF 
2006 
Yes 
Inorganic Chemistry
ISSN: 0020-1669
EISSN: 1520-510X 
45 
26 
10472-10478 
English 
17173402 
WOS:000242899400019 
We report the synthesis of potassium phthalocyanine (KPc) and its structural characterization by synchrotron X-ray powder diffraction. We find that while KPc adopts the beta-polymorphic structural type (monoclinic space group P21/a) common for many MPc solids, its structure is characterized by unique features. The K+ ions, which are statistically disordered over two symmetry-equivalent positions, reside in the intrastack spacing of the rodlike molecular assemblies and strongly bond equidistantly to selected N atoms of the two neighboring Pc rings along the chain direction with an unusual 5-fold coordination. The K+-stuffed slipped stacks of Pc units display much greater intrastack and slippage distances than those of other beta-MPc polymorphs. They may be thought as comprising disordered dimeric (Pc)22- units; this leads to electron pairing and is consistent with the observed nonmagnetic response of the system.