2006
DOI: 10.1021/ja060051h
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Face-Driven Corner-Linked Octahedral Nanocages:  M6L8 Cages Formed by C3-Symmetric Triangular Facial Ligands Linked via C4-Symmetric Square Tetratopic PdII Ions at Truncated Octahedron Corners

Abstract: The face-driven corner-linked truncated octahedral nanocages, [Pd6L8]12+ (1, L1 = N,N',N' '-tris(3-pyridinyl)-1,3,5-benzenetricarboxamide; 2, L2 = N,N',N' '-tris(4-pyridinylmethyl)-1,3,5-benzenetricarboxamide), were prepared with eight C3-symmetric tridentate ligands and six square planar tetratopic palladium(II) ions. The combination of the nitrogen donor atom at a approximately 120 degrees kink position of the carboxamido pyridinyl group and the tilted pyridyl versus the facial plane of the ligands can provi… Show more

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Cited by 168 publications
(58 citation statements)
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“…Molecular entities with stellated structures have rarely been identified; and the only self-assembled example is a pentanuclear silver complex reported by Constable et al [14] The overall size of the assembly in complex 1 is roughly 3.1 nm, as measured from the centers of the basal hydrogen atoms of the -(CH 2 ) 3 -planes for diametrically opposed ligands. The surface of the structure is not fully enclosed, and there are eight windows (Figure 1 b) [15][16][17][18][19] In all these cases the ligands are achiral and based on a 1,3,5-tris-substituted benzene core, which leads to structures of considerably less spiked aspect than seen in the [Pd 6 (L1) 8 ] 12+ structure of 1, and have either truncated octahedral or octahedral geometry. The largest of these structures, of around 3 nm in size, is formed with a variety of divalent transition-metal ions and a disclike ligand with a hexaphenylenebenzene core, but does not contain any significant windows.…”
mentioning
confidence: 99%
“…Molecular entities with stellated structures have rarely been identified; and the only self-assembled example is a pentanuclear silver complex reported by Constable et al [14] The overall size of the assembly in complex 1 is roughly 3.1 nm, as measured from the centers of the basal hydrogen atoms of the -(CH 2 ) 3 -planes for diametrically opposed ligands. The surface of the structure is not fully enclosed, and there are eight windows (Figure 1 b) [15][16][17][18][19] In all these cases the ligands are achiral and based on a 1,3,5-tris-substituted benzene core, which leads to structures of considerably less spiked aspect than seen in the [Pd 6 (L1) 8 ] 12+ structure of 1, and have either truncated octahedral or octahedral geometry. The largest of these structures, of around 3 nm in size, is formed with a variety of divalent transition-metal ions and a disclike ligand with a hexaphenylenebenzene core, but does not contain any significant windows.…”
mentioning
confidence: 99%
“…The 3D pores containing tripyridylamide moieties as functional units in the channels are particularly attractive for guest uptake and/or ion-exchange studies, thus making such 3D coordination polymers potentially attractive as molecular materials. In this context, the exchange process was carried out in aqueous solution, and hence the voids were successfully filled with ClO 4 À anions (two, of which one is regularly arranged and the other is disordered) and a large number of water molecules (17 water molecules in an asymmetric unit), which are involved in hydrogen-bonding with the ClO 4 À anions, the amide groups, and even the water molecules themselves in the 3D channels (the hydrogen-bond data are [8] in 1 c, 2, and 3.…”
Section: Resultsmentioning
confidence: 99%
“…In addition, a systematic change in the coordination geometries of the metal ions from tetrahedral (four-coordinate) Cu I ions to trigonal-bipyramidal (five-coordinate) Zn II ions to octahedral (six-coordinate) Cd II ions has been observed, leading to the different structural frameworks. [8] 1 c N(2)ÀH(2A)···O (7) [a] 0.88 2.164 2.937 (7) 146.5 O(6)ÀH(6A)···O (7) 0.89 1.893 2.756 (9) 162.6 O(7)ÀH(7A)···O (2) 0.88 2.555 3.303 (7) 143.4 O(8)ÀH(8A)···O (9) 0.90 1.877 2.680(18) 147.1 2 N(2)ÀH(2A)···O (13) 0.88 2.302 3.152 (7) 162.9 N(2)ÀH(2A)···O (14) 0.88 2.434 3.088 (8) 131.6 N(4)ÀH(4A)···O (22) 0.88 2.100 2.968 (8) 168.8 N(6)ÀH(6B)···O(23) [b] 0.88 2.053 2.908 (8) 164.1 N(10)ÀHA C H T U N G T R E N N U N G (10A)···O (5) 0.88 2.186 3.005 (8) 154.9 N(12)ÀHA C H T U N G T R E N N U N G (12A)···O (24) 0.88 1.960 2.824 (7) 166.5 N(14)ÀHA C H T U N G T R E N N U N G (14A)···O (20) 0.88 1.989 2.838 (7) 161.6 O(16)ÀHA C H T U N G T R E N N U N G (16A)···O(10) [c] 0.90 1.881 2.741 (7) 159.8 O(16)ÀHA C H T U N G T R E N N U N G (16B) ···O(27) 0.90 1.768 2.641 (8) 162.8 O(27)ÀH(27)···O (17) 0.90 1.910 2.802 (10) 170.1 O(27)ÀHA C H T U N G T R E N N U N G (27')···O(26) [d] 0.90 1.851 2.743(11) 170.9 3 N(2)ÀH(2)···O(1) [e] 0.88 2.379 3.129(17) 143.5…”
Section: A C H T U N G T R E N N U N G Amide Interactions [O(16)···omentioning
confidence: 99%
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