Five long bis(4-pyridyl) ligands with different tether groups, namely 1,4-phenylenebis(4-pyridylmethanone)(L-1), bis(4-pyridyl)terephthalate (L-2), 1,5-bis(pyridin-4-ylmethoxy)naphthalene (L-3), 1,4-bis[2-(4-pyridyl)ethenyl]benzene (L-4) and 4,4'-bis(pyridin-4-ylmethoxy)biphenyl (L-5), have been synthesized and employed for the self-assembly of coordination polymers and architectures, with the aim of obtaining structural motifs characterized by long metal-metal separations. Six coordination products (compounds 1-6) have been obtained by reacting the ligands with cobalt(II) nitrate in all cases but one, in which zinc(II) triflate was used. The crystal structures show a variety of structural motifs. [Co(L-2)(NO3)(2)(MeCN)].MeCN (2) and [Co(L-5)(NO3)(2)] (5) contain one-dimensional polymeric chains (linear, with a period of 19.64 Angstrom in 2; zigzag, with a period of 38.65 Angstrom in 5). [Zn(L-1)(H2O)(4)](CF3SO3)(2).(L-1)(2). H2O (1) and [Co(L-4)(2)(H2O)(4)](NO3)(2).(L-4)(4).(H2O)(8) (4) exhibit extended three-dimensional and two-dimensional arrays, respectively, sustained both by coordinative and hydrogen bonds. Compound 3, [Co(L-3)(2)(NO)].(CH2Cl2), consists of two-dimensional layers of large rhombic meshes (diagonals of the rhombus 15.43 and 35.74 Angstrom), while compound 6, [Co-2(L-5)(4)(NO3)(4)].(Me2CO)(2), contains discrete dinuclear molecules, consisting of large rings with appendages, which exhibit an exceptionally long dimension of 62.84 Angstrom and form columnar supramolecular arrays.

Using long bis(4-pyridyl) ligands designed for the self-assembly of coordination frameworks and architectures / S. Banfi, L. Carlucci, E. Caruso, G. Ciani, D.M. Proserpio. - In: JOURNAL OF THE CHEMICAL SOCIETY DALTON TRANSACTIONS. - ISSN 0300-9246. - :13(2002), pp. 2714-2721.

Using long bis(4-pyridyl) ligands designed for the self-assembly of coordination frameworks and architectures

L. Carlucci
Secondo
;
G. Ciani
Penultimo
;
D.M. Proserpio
Ultimo
2002

Abstract

Five long bis(4-pyridyl) ligands with different tether groups, namely 1,4-phenylenebis(4-pyridylmethanone)(L-1), bis(4-pyridyl)terephthalate (L-2), 1,5-bis(pyridin-4-ylmethoxy)naphthalene (L-3), 1,4-bis[2-(4-pyridyl)ethenyl]benzene (L-4) and 4,4'-bis(pyridin-4-ylmethoxy)biphenyl (L-5), have been synthesized and employed for the self-assembly of coordination polymers and architectures, with the aim of obtaining structural motifs characterized by long metal-metal separations. Six coordination products (compounds 1-6) have been obtained by reacting the ligands with cobalt(II) nitrate in all cases but one, in which zinc(II) triflate was used. The crystal structures show a variety of structural motifs. [Co(L-2)(NO3)(2)(MeCN)].MeCN (2) and [Co(L-5)(NO3)(2)] (5) contain one-dimensional polymeric chains (linear, with a period of 19.64 Angstrom in 2; zigzag, with a period of 38.65 Angstrom in 5). [Zn(L-1)(H2O)(4)](CF3SO3)(2).(L-1)(2). H2O (1) and [Co(L-4)(2)(H2O)(4)](NO3)(2).(L-4)(4).(H2O)(8) (4) exhibit extended three-dimensional and two-dimensional arrays, respectively, sustained both by coordinative and hydrogen bonds. Compound 3, [Co(L-3)(2)(NO)].(CH2Cl2), consists of two-dimensional layers of large rhombic meshes (diagonals of the rhombus 15.43 and 35.74 Angstrom), while compound 6, [Co-2(L-5)(4)(NO3)(4)].(Me2CO)(2), contains discrete dinuclear molecules, consisting of large rings with appendages, which exhibit an exceptionally long dimension of 62.84 Angstrom and form columnar supramolecular arrays.
Settore CHIM/03 - Chimica Generale e Inorganica
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/178193
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