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
Triphenylamine based lab-on-a-molecule for the highly selective and sensitive detection of Zn2+ and CN- in aqueous solution
Sun, Shichao,Shu, Qinghai,Lin, Pengchao,Li, Yanyue,Jin, Shaohua,Chen, Xin,Wang, Dequan
, p. 93826 - 93831 (2016)
Simple dual sensing of Zn2+ and CN- was reported for the first time using the triphenylamine based lab-on-a-molecule TATP in both UV-Vis and fluorescence channels over other tested ions. Meanwhile, the sensing mechanism for both title ions was further studied using NMR titration and DFT calculations.
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.
Chirality transcription in the anion-coordination-driven assembly of tetrahedral cages
Fu, Jin,Wu, Biao,Yang, Xiao-Juan,Zhang, Dan,Zhang, Huizheng,Zhang, Wenyao,Zhao, Yanxia,Zheng, Bo
, p. 2475 - 2478 (2020)
Enantiopure A4L4 tetrahedral cages (either ΔΔΔΔ or ΛΛΛΛ) were obtained through the anion-coordination-driven assembly (ACDA) of phosphate anions with C3-symmetric tris-bis(urea) ligands bearing chiral groups.
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.
Trismaleimide Dendrimers: Helix-to-Superhelix Supramolecular Transition Accompanied by White-Light Emission
Li, Fen,Li, Xiaohui,Wang, Ying,Zhang, Xin
, p. 17994 - 18002 (2019/11/13)
Reported here are unprecedented fluorescent superhelices composed of primary, supramolecular polymers of the opposite helical twist. A new class of functional dendrimers was synthesized by amino-ene click reactions, and they demonstrate an alternating OFF/ON fluorescence with generation growth. A peripherally alkyl-modified dendrimer displays helix-sense-selective supramolecular polymerization, which predominantly forms right-handed (or left-handed) helical supramolecular polymers in the solution containing chiral solvents. With increasing the concentration, these primary helical supramolecular polymers spontaneously twist around themselves in the opposite direction to form superhelical structures. Atomic force microscopy and circular dichroism measurements were used to directly observe the helix-to-superhelix transition occurring with a reversal in the helical direction. Exceptional white-light emission was observed during superhelix formation.
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.
Covalently Trapped Triarylamine-Based Supramolecular Polymers
Liang, Ting,Collin, Dominique,Galerne, Melodie,Fuks, Gad,Vargas Jentzsch, Andreas,Maaloum, Mounir,Carvalho, Alain,Giuseppone, Nicolas,Moulin, Emilie
, p. 14341 - 14348 (2019/11/03)
C3-Symmetric triarylamine trisamides (TATAs), decorated with three norbornene end groups, undergo supramolecular polymerization and further gelation by π–π stacking and hydrogen bonding of their TATA cores. By using subsequent ring-opening metathesis polymerization, these physical gels are permanently crosslinked into chemical gels. Detailed comparisons of the supramolecular stacks in solution, in the physical gel, and in the chemical gel states, are performed by optical spectroscopies, electronic spectroscopies, atomic force microscopy, electronic paramagnetic resonance spectroscopy, X-ray scattering, electronic transport measurements, and rheology. The results presented here clearly evidence that the core structure of the functional supramolecular polymers can be precisely retained during the covalent capture whereas the mechanical properties of the gels are concomitantly improved, with an increase of their storage modulus by two orders of magnitude.
Catalytic hydrogenation of carbonyl and nitro compounds using an [: N, O] -chelate half-sandwich ruthenium catalyst
Yao, Zi-Jian,Zhu, Jing-Wei,Lin, Nan,Qiao, Xin-Chao,Deng, Wei
, p. 7158 - 7166 (2019/06/13)
A series of N,O-chelate half-sandwich ruthenium complexes for both carbonyl and nitro compound hydrogenation have been synthesized based on β-ketoamino ligands. All complexes exhibited high activity for the catalytic hydrogenation of a series of ketones and nitroarenes with molecular H2 as the reducing reagent in aqueous medium. Consequently, the catalytic system showed the catalytic TON values of 950 for 1-phenylethanol in acetophenone hydrogenation and 1960 for 1-chloro-4-nitrobenzene in p-chloroaniline hydrogenation. Good catalytic activity was displayed for various kinds of substrates with either electron-donating or electron-withdrawing groups. The neutral ruthenium complexes 1-4 were fully characterized using NMR, IR, and elemental analysis. Molecular structures of complexes 2 and 4 were further confirmed using single-crystal X-ray diffraction analysis.
Strategic design of triphenylamine- and triphenyltriazine-based two-dimensional covalent organic frameworks for CO2 uptake and energy storage
El-Mahdy, Ahmed F. M.,Kuo, Cheng-Han,Alshehri, Abdulmohsen,Young, Christine,Yamauchi, Yusuke,Kim, Jeonghun,Kuo, Shiao-Wei
, p. 19532 - 19541 (2018/10/24)
Hexagonally ordered covalent organic frameworks (COFs) are interesting new crystalline porous materials that have massive potential for application in gas storage. Herein, we report the synthesis of two series of two-dimensional hexagonally ordered COFs - TPA-COFs and TPT-COFs - through one-pot polycondensations of tris(4-aminophenyl)amine (TPA-3NH2) and 2,4,6-tris(4-aminophenyl)triazine (TPT-3NH2), respectively, with triarylaldehydes featuring different degrees of planarity, symmetry, and nitrogen content. All the synthesized COFs exhibited high crystallinity, large BET surface areas (up to 1747 m2 g-1), excellent thermal stability, and pore size distributions from 1.80 to 2.55 nm. The symmetry and planarity of the monomers strongly affected the degrees of crystallinity and the BET surface areas of the resultant COFs. In addition, these COFs displayed excellent CO2 uptake efficiencies of up to 65.65 and 92.38 mg g-1 at 298 and 273 K, respectively. The incorporation of the more planar and higher-nitrogen-content triaryltriazine unit into the backbones of the TPA-COFs and TPT-COFs enhanced the interactions with CO2, leading to higher CO2 uptakes. Moreover, the synthesized COFs exhibited electrochemical properties because of their conjugated structures containing redox-active triphenylamine groups. This study exposes the importance of considering the symmetry and planarity of the monomers when designing highly crystalline COFs; indeed, the structures of COFs can be tailored to vary their functionalities for specific applications.
