Premium
Self‐Assembly of N , N′ , N″ , N″′ ‐Tetra(pyridin‐4‐yl)‐1,4,7,10‐tetraazacyclododecane‐1,4,7,10‐tetracarboxamide with Zn 2+ or Cd 2+ Ions
Author(s) -
Tzeng BiingChiau,
Lu YunMei,
Lee GeneHsiang,
Peng ShieMing
Publication year - 2006
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200501060
Subject(s) - chemistry , cyclen , crystallography , supramolecular chemistry , tetra , luminescence , stereochemistry , ligand (biochemistry) , crystal structure , medicinal chemistry , biochemistry , physics , receptor , optoelectronics
We report the design and synthesis of N , N′ , N″ , N″′ ‐tetra(pyridin‐4‐yl)‐1,4,7,10‐tetraazacyclododecane‐1,4,7,10‐tetracarboxamide ( L ), which contains four N ‐(pyridin‐4‐yl)carboxamide groups as functional appendages, as well as the structural and luminescence properties of its Zn 2+ and Cd 2+ complexes. The reaction of ZnBr 2 with L forms the two‐dimensional coordination polymer [ZnBr 2 ( L ) 1/2 ] n ( 1 ). In the two‐dimensional domain, the 68‐membered metallomacrocycles as well as 12‐membered 1,4,7,10‐tetraazacyclododecane (cyclen) units propagate into two‐dimensional extended structures. Interestingly, the metallomacrocycles are stacked to form one‐dimensional parallelogram channels in the solid state. In addition, the reaction of CdX 2 (X = Br, I) with L forms the isomorphous, three‐dimensional coordination networks [CdX 2 ( L )] n [X = Br ( 2 ), I ( 3 )], which have tubular channels in the solid state. L in 1 – 3 is tetradentate and acts as a versatile connector in the construction of supramolecular coordination networks. The 34‐membered metallomacrocycles and 12‐membered cyclen macrocycles of 2 and 3 also propagate into three‐dimensional extended structures. Unlike those of 1 and 2 , the emission maximum at around 439 nm in the iodo compound 3 can be assigned to a ligand‐to‐metal charge‐transfer (LMCT) transition as the excited state upon photoexcitation. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)