Organic monolayer synthesis

Kaifer and coworkers showed interest in the modification of metal nanoparticles with organic monolayers prepared with suitable molecular hosts. They reported the preparation of water-soluble platinum and palladium nanoparticles modified with thiolated /1-cyclodexlrin (/ -CD) [69]. Nanoparticle synthesis was... 

The synthesis of LA-pyrenemethylamine conjugate 393 and its self-assembled organic monolayer formed on a gold surface, based as in previous examples on the anchoring ability of the cyclic disulfide moiety of LA, has been carried out <2000ELA21> for the purpose of the potential design of electrochemical immunosensors of monoclonal antibody-benzo [a pyrene interaction. 

Fig. 35.1 (Top, left) Synthesis of bidentate thiolate calix[4]arene 2a and 2b (right) schematic representation of the synthesis of a series of AuNPs having a mixed organic monolayer of thiolate calix[4]arene (2a or 2b) and dodecanthiol (C12SH) prepared by a ligand-exchange reaction liom dodecanthiol-capped AuNP(C12) bottom, left) 1,3-dipropoxy calix[4]arene 3 and tetramethy-lammonium and A-methyl pyridinium salts...

Ziegler, K.J., Doty, C.R., Johnston, K.P. and Korgel, B.A. (2001) Synthesis of organic monolayer-stabilized copper nanocrystals in supercritical water. 

The ITIES with an adsorbed monolayer of surfactant has been studied as a model system of the interface between microphases in a bicontinuous microemulsion [39]. This latter system has important applications in electrochemical synthesis and catalysis [88-92]. Quantitative measurements of the kinetics of electrochemical processes in microemulsions are difficult to perform directly, due to uncertainties in the area over which the organic and aqueous reactants contact. The SECM feedback mode allowed the rate of catalytic reduction of tra 5-l,2-dibromocyclohexane in benzonitrile by the Co(I) form of vitamin B12, generated electrochemically in an aqueous phase to be measured as a function of interfacial potential drop and adsorbed surfactants [39]. It was found that the reaction at the ITIES could not be interpreted as a simple second-order process. In the absence of surfactant at the ITIES the overall rate of the interfacial reaction was virtually independent of the potential drop across the interface and a similar rate constant was obtained when a cationic surfactant (didodecyldimethylammonium bromide) was adsorbed at the ITIES. In contrast a threefold decrease in the rate constant was observed when an anionic surfactant (dihexadecyl phosphate) was used. 

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