5981-09-9Relevant articles and documents
Tetrahedral anion cage: Self-assembly of a (PO4) 4L4 complex from a tris(bisurea) ligand
Wu, Biao,Cui, Fengjuan,Lei, Yibo,Li, Shaoguang,De Sousa Amadeu, Nader,Janiak, Christoph,Lin, Yue-Jian,Weng, Lin-Hong,Wang, Yao-Yu,Yang, Xiao-Juan
, p. 5096 - 5100 (2013)
A C3-symmetric tris(bisurea) ligand L assembles with PO 43- ions to form the tetrahedral cage [(PO 4)4L4]12-. The PO4 3- ions form the four vertices and each forms 12 N-H?O hydrogen bonds with 6 urea groups. A unique trinuclear pinwheel-like helical complex [(SO4)3L2]6- is formed from L and SO42- ions (see picture). Copyright
The 'Trinity' helix: Synthesis and structural characterisation of a C3-symmetric tris-bidentate ligand and its coordination to Ag(I)
Conerney, Brian,Jensen, Paul,Kruger, Paul E.,MacGloinn, Conchueir
, p. 1274 - 1275 (2003)
The synthesis and structural characterisation of a novel C3-symmetric tris-bidentate ligand, L, featuring a triphenylamine core appended by pyridylimine coordination sites is reported: 1H NMR compleximetric titration studies with Ag(I) and ESMS indicate the presence of [Ag3L2]3+ species in solution, consistent with the formation of a trinuclear double helicate complex: the Trinity helix.
Tr?ger's base functionalized recyclable porous covalent organic polymer (COP) for dye adsorption from water
Jejurkar, Valmik P.,Yashwantrao, Gauravi,Saha, Satyajit
, p. 12331 - 12342 (2020/07/30)
Protection of the environment from the increasing threats of pollution from several chemical industries in a sustainable way has become a major global challenge. The colored effluents from the textile and dyestuff industries are major sources of pollution, contaminating water bodies. Herein, we have synthesized a covalent organic polymer TBTPACOP having a V-shaped Tr?ger's base unit in the framework with the notion that the unique cleft like architecture of TB will infuse porosity and robustness in the amorphous polymeric material. The covalent organic polymer (COP) was used for the adsorption of anionic acid dyes from aqueous effluent. The equilibrium adsorption capacity (qe) was found to be 188.96 mg g-1. The excellent dye adsorption capacity of the COP, adsorbing 95% of an acid dye (Acid Orange II) at room temperature within 70 min, along with its recyclability up to 4 consecutive cycles, makes TBTPACOP an extremely promising material for selective and efficient removal of acid dyes from aqueous effluent.
Temperature Control of Sequential Nucleation–Growth Mechanisms in Hierarchical Supramolecular Polymers
Osypenko, Artem,Moulin, Emilie,Gavat, Odile,Fuks, Gad,Maaloum, Mounir,Koenis, Mark A. J.,Buma, Wybren Jan,Giuseppone, Nicolas
, p. 13008 - 13016 (2019/09/13)
Upon cooling insolution, chiral triarylamine tris-amide unimers produce organogels by stacking into helical supramolecular polymers, which subsequently bundle into larger fibers. Interestingly, circular dichroism, vibrational circular dichroism, and AFM imaging of the chiral self-assemblies revealed that monocolumnar P-helical fibrils formed upon fast cooling, whereas bundled M-superhelical fibers formed upon slow cooling. The mechanistic study of this structural bifurcation reveals the presence of a strong memory effect, reminiscent of a complex stepwise combination of primary and secondary nucleation-growth processes. These results highlight the instrumental role of sequential self-assembly processes to control supramolecular architectures of multiple hierarchical order.
