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Coordination-Driven Self-Assembly of Discrete Molecular Nanotubular Architectures
journal contribution
posted on 2019-08-08, 16:35 authored by Imtiyaz Ahmad Bhat, Ennio Zangrando, Partha Sarathi MukherjeeTwo new M8L4 tetrafacial
nanotubes (T1 and T3) of different lengths
have been synthesized in water using ligands L1 and L2, respectively, with acceptor cis-[(dch)Pt(NO3)2] (M) using
coordination-driven self-assembly [where dch is 1,2-diaminocyclohexane, L1 is 1,4-di(pyrimidin-5-yl)benzene, and L2 is
4,4′- di(pyrimidin-5-yl)-1,1′-biphenyl]. In addition
to complex T1, a tetrahedral cage of composition [M12(L1)6] (T2) was also formed in the
self-assembly reaction of ligand L1 with cis-[(dch)Pt(NO3)2]. The precise
composition of the products (T1 and T2)
in solution was confirmed by 1H NMR and ESI–MS.
Pure tube T1 was separated out by a crystallization technique
and fully characterized by 1H NMR and X-ray diffraction.
Temperature- and concentration-dependent NMR studies indicated no
equilibrium between T1 and T2 in the solution
phase, and the proportion of T1 and T2 in
the mixture depends on the temperature of the reaction. In contrast
to ligand L1, the self-assembly of the longer ligand, L2, with cis-[(dch)Pt(NO3)2] gave only tetrafacial tube [M8(L2)4] (T3) without any tetrahedral cage.