Metal-induced self-assembly

Bodenant B, Fages F, Delville MH (1998) Metal-induced self-assembly of a pyrene-tethered hydroxamate ligand for the generation of multichromophoric supramolecular systems. The pyrene excimer as switch for iron(III)-driven intramolecular fluorescence quenching. J Am Chem Soc 120 7511-7519... 

Jacopozzi P, Dalcanale E (1997) Metal-induced self-assembly of cavitand-based cage molecules. Angew Chem Int Ed 36 613... 

In another study, the metal-induced self-assembly of other cage stuctures, in which four platinum(II) or palladium(II) ions serve to link two preorganised (identical) cone-shaped precursors via cis nitrile-metal-nitrile bonds, has been reported. 

Lee, S.B. Hong, J.-I. A new water-soluble bowl-shaped host by metal-induced self-assembly. Tetrahedron Lett. 1998. 39, 4317-4320. 

Therefore, the following method was suggested and realized (the scheme is shown in Fig. 17). A 1.5 M solution of KCl or NaCl (the effect of preventing BR solubility of these salts is practically the same) was used as a subphase. A platinum electrode was placed in the subphase. A flat metal electrode, with an area of about 70% of the open barriered area, was placed about 1.5-2 mm above the subphase surface. A positive potential of +50 -60 V was applied to this electrode with respect to the platinum one. Then BR solution was injected with a syringe into the water subphase in dark conditions. The system was left in the same conditions for electric field-induced self-assembly of the membrane fragments for 1 hour. After this, the monolayer was compressed to 25 mN/m surface pressure and transferred onto the substrate (porous membrane). The residual salt was washed with water. The water was removed with a nitrogen jet. 

Historically, the first multivalent glycoconjugate obtained by metal-assisted self-assembly was described in 1994 by Sakai and Sasaki (Fig. 35).267 The methodology was based on the trimerization of unsymmetrical Bipy-GalNAc (307) induced by the presence of Fe(II) salts, to give the tridentate Fen(bipy-GalNAc)3 cluster 308 as a mixture of four diastereomeric isomers (A-fac, A-fac, A-mer, and A-mer). 

Evaporation-Induced Self-Assembly for the Preparation of Porous Metal Oxide Films... 

GENERATION OF MESOPOROUS CRYSTALLINE METAL OXIDE FILMS VIA EVAPORATION-INDUCED SELF-ASSEMBLY... 

The tailored design of the titanium-coordinated surfactant and its application in an evaporation-induced self-assembly process followed by heat treatment enabled the preparation of periodic mesoporous silica-based films with a high loading and good dispersion of tetrahedral titanium atoms within the silica matrix. This approach is also feasible for a variety of other transition metal oxides. 

So far as passivated Ag nanoparticles concerns, diere is known a convenient one-pot preparation method (14). Silver salt of carbonic acid such as myristote is heated at about 620 K without any solvent. Pyrolytically reduced Ag atoms then self-assemble to form metal clusters of about 5 nm in diameter, which are surrounded by remaining Ag myristate to form organo-passivated Ag nanoparticles with yield of 70 %. This type of self-organization may be called reaction-induced self-assembly. 

Xu C, Xu G, Liu Y, Zhao X, Guanghou WG (2002) Preparation and characterization of SnO nanorods by thermal decomposition of SnC O precursor. Seri Mater 46 789-794 Yang HX, Qian JF, Chen ZX, Ai XP, Cao YL (2007) Multilayered nanocrystaUine SnO hollow microspheres S3mthe-sized by chemically induced self-assembly in the hydrothermal environment. J Phys Chem 111 14067-14071 Yuan L, Hyodo T, Shimizu Y, Egashira M (2011) Preparation of mesoporous and/or macroporous SnO -based powders and their gas-sensing properties as thick film sensors. Sensors 11 (2) 1261-1276 Yue W, Zhou W (2008) Crystalline mesoporous metal oxide. Progr Nat Sci 18 1329-1338... 

Fig. 6.6 2D-controUed metal array fabrication based on the ultrasound-induced self-assembly of Pd- and Pt-bound glutamine dipeptides... 

Ogata K, Sasano D, Yokoi T, Isozaki K, Seike H, Takaya H, Nakamura M (2012) Pd-complex-bound amino add-based supramolecular gel catalyst for intramolecular addition-cyclization of alkynoic adds in water Chem Lett 41 498-5(X). doi 10.1246/cl.2012.498 Isozaki K, Haga Y, Ogata K, Naota T, Takaya H (2013) Meted array fabrication based on Ultrasound-induced self-assembly of metalated dipeptides. Dalton Trans doi 0.1039/ C3DT51696B... 

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