TY - JOUR A1 - Reck, Günter A1 - Schulz, Burkhard A1 - Bricks, J. A1 - Li, Yanqin A1 - Resch-Genger, Ute T1 - Monoalkylated 4'-aryl-substituted terpyridines N2 - 1-Methyl-2-[4-phenyl-6-(pyridinium-2-yl)­pyridin-2-yl]­pyridinium diperchlorate, C22H19N32+·2ClO4-, (I), and 2-[4-(methoxy­phenyl)-2,2'-bipyridin-6-yl]-1-methyl­pyridinium iodide, C23H20N3O+·I-, (II), both crystallize in the monoclinic space group P21/c. In contrast with the monocharged mol­ecule of (II), the doubly charged mol­ecule of (I) contains an additional protonated pyridine ring. One of the two perchlorate counter-anions of (I) interacts with the cation of (I) via an N—HO hydrogen bond. In (II), two mol­ecules related by a centre of symmetry are connected by weak ?–? interactions, forming dimers in the crystal structure. KW - X-ray structure analysis KW - Fluorescent sensors KW - Molecular conformation KW - Intermolecular interactions PY - 2004 DO - https://doi.org/10.1107/S010827010400825X SN - 0108-2701 SN - 1600-5759 VL - 60 SP - o402 EP - o404 PB - Blackwell Publ. CY - Oxford AN - OPUS4-3563 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -