Résumés Année 2016

"Influence of the supramolecular order on the electrical properties of 1D coordination polymers based materials"

C. Musumeci, S. Osella, L. Ferlauto, D. NiedzialekI, L. Grisanti, S. Bonacchi, A. Jouaiti, S. Milita, A. Cieslieski, D. Beldonne, M. W. Hosseini, P. Samori, Nanoscale, 2016, 8, 2386-2394.(download.pdf)

Abstract: The generation, under self-assembly conditions, of coordination polymers on surface based combinations of a terpyridine-antracene-pyridine based tecton and Co(II) or Pd(II) cations is primarily governed by the coordination geometry of the metal center (octahedral and square planar respectively). While the octahedral Co(II) based polymer self-assembles in insulating films exhibiting randomly oriented crystalline domains, the planarity of Pd(II) based polymers leads to the formation of conductive π-π stacked fibrillar structures exhibiting anisotropically oriented domains. In the latter case, the favorable Pd-Pd and anthracene-anthracene wavefunction overlaps along the fiber direction are responsible for the large electronic couplings between adjacent chains, whereas small electronic couplings are instead found along individual polymer chains. These results provide important guidelines for the design of conductive metal coordination polymers, highlighting the fundamental role of both intra- as well as inter-chain interactions, thus opening up new perspectives towards their application in functional devices.)

"Molecular tectonics: 1D tubular type and 3D diamond like mercury (II) coordination polymers based on pyridyl appended p-tert-butyl-tetrathiacalix[4]arene"

A. Ovsyannikov, S. Ferlay, S. E. Solovieva, I. S. Antipin, A. I. Konovalov, N. Kyritsakas, M. W. Hosseini, Macroheterocycles, 2016, 9, 17-22.(download.pdf)

Abstract: 1D tubular-type and 3D diamond-like coordination polymers are formed upon combining pyridyl appended p-tert-butyl-tetrathiacalix[4]arene in 1,3-alternate conformation  tectons 4 and 5 with mercury (II) chloride.

"Molecular tectonics: dimensionality and geometry control of silver coordination networks based on pyrazolyl appended thiacalixarenes"

A. Ovsyannikov, S. Ferlay, M. H. Noamane, R. Abidi, S. E. Solovieva, I. S. Antipin, A. I. Konovalov, N. Kyritsakas, M. W. Hosseini, CrystEngComm, 2016, 18, 691-703.(download.pdf)

Abstract: Combinations of six new coordinating tectons (3-8) tetrakis-pyrazolyl appended calix[4]arenes, blocked in 1,3-A conformation, based on 1 (tetrathiacalix[4]arene) and 2 (tetrathiatetramercaptocalix[4]arene) derivatives, with AgX salts (X = NO3-, BF4-, XF6- (X = P, As and Sb)) lead to nine new silver coordination networks. The flexible nature of tectons 3-8 (length of the spacer between the macrocycle and the pyrazolyl coordinating unit), their high number of potential coordinating sites and the loose coordination demand of Ag+ cation lead to the formation of a large variety of networks with different dimensionality: from 1D (5-AgSbF6, 5-AgBF4, 7-AgSbF6 and 8-AgNO3) to extended 2D (6-AgBF4 and 8-AgSbF6) and to a series of three isostructural porous diamond-like 3D architectures (6-AgXF6 (X = P, As and Sb)).