Hexane dithiol

Luminescent multilayer systems have been reported extensively in Langmuir-Blodgett studies however, reports of intrinsically luminescent self-assembled multilayers are far rarer. Bard has reported on an intriguing luminescent multilayer comprised of alternate layers of 1,6-hexane dithiols and Cu ions (see Figure 5.59),... 

Figure 5.59 Schematic of the multilayer formation of alternate 1,6-hexane dithiol molecules and Cu(ll) ions [87]...

Solid luminescent materials, with identical emission kmax values, were also obtained on the reaction of 1,6-hexane dithiol with cupric perchlorate. The origins of the luminescence in both the film and solid appear to be the same, although this is not yet clearly understood. It is likely that they are associated with Cu-Cu interactions in what is essentially a polynuclear structure. 

Monomer. St, styrene MMA, methyl methacrylate AN, acrylonitrile NIPAAm, /V-isopropylacrylamide MAA, methacryhc acid NDEAMA, 2-diethylaminoethyl methacrylate MBAA, MW -methylene bisa-crylamide TRIM, trimethylolpropane trimethacrylate ODVE, octadecylvinyl ether ODA, octadecyl acrylate DMAAm, iV,iV-dimethylacrylamide PyMMA, 1-pyrenylmethyl methacrylate AnMMA, 9-an-thracenylmethyl methacrylate HDT, 1,6-hexane dithiol TEGDVE, triethyleneglycol divinyl ether HEMA, hydroxyethyl methacrylate AAm, acrylamide PEG-DA, poly(ethylene glycol) diacrylate PEG-TA, poly(ethylene glycol) tetraacrylate. 

Alivisatos and coworkers reported on the realization of an electrode structure scaled down to the level of a single Au nanocluster [24]. They combined optical lithography and angle evaporation techniques (see previous discussion of SET-device fabrication) to define a narrow gap of a few nanometers between two Au leads on a Si substrate. The Au leads were functionalized with hexane-1,6-dithiol, which binds linearly to the Au surface. 5.8 nm Au nanoclusters were immobilized from solution between the leads via the free dithiol end, which faces the solution. Slight current steps in the I U) characteristic at 77K were reflected by the resulting device (see Figure 8). By curve fitting to classical Coulomb blockade models, the resistances are 32 MQ and 2 G 2, respectively, and the junction... 

Later, polythioesters were prepared by the polycondensation of dicarboxylic acid diesters with a dithiol [43] (Fig. 12). Initially, various lipases were screened in the polycondensation between diethyl adipate and hexane-1,6-dithiol at 120 °C in the presence of molecular sieves. The use of 70wt% immobilized CALB as catalyst proved to be efficient in these polycondensation reactions with dicarboxylic acid... 

The structure proof of the stereochemistry of the lachrymatory factor of onions was determined by reduction of the 1,2-dithietane dioxide with LAH. The ( )-hexane-3,4-dithiol product establishes the ring stereochemistry as trans (Scheme 43) (80JA2490). 

Clayfen (1.13 g, 1.2 mmol of iron(III) nitrate) is thoroughly mixed with neat thioacetal lb (0.227 g, 1 mmol) in the solid state. The material is transferred in a test tube and placed in an alumina bath inside the microwave oven and irradiated (40 s). Upon completion of the reaction, monitored on TLC (hexane-EtOAc, 8 2, v/v), the product was extracted into ethylene chloride. The resulting solution is passed through a small bed of neutral alumina. Evaporation of the solvent delivers pure p-nitrobenzaldehyde 2b in 97% yield. In the case of cyclic thio acetals and ketals, the liberated dithiols bind to the clay surface rather tightly and a simple washing of the clayfen affords clean products. 

A guided self-assembly of gold nanoparticles succeeded also on patterned GaAs surfaces. Stmctured Be-doped GaAs surfaces were first decorated with a monolayer of xylyl dithiol molecules. A uniform monolayer of dodecanethiol stabilized 5 nm Au particles, generated by spreading a hexane solntion... 

To a suspension of bismuth salt (0.04-10 mol%) in acetonitrile (4 ml) were added successively a carbonyl compound (5.0 mmol) and a thiol (10 mmol) or a dithiol (5.0 mmol) at room temperature under aerial conditions. The mixture was magnetically stirred for an appropriate time until the reaction is complete. The mixture was evaporated on a rotary evaporator and the crude product was chromatographed on silica gel using ethyl acetate-hexane (1/10) as the eluent to give the expected thioacetal almost quantitatively [95SL984]. 

IV) in 50 g ethane dithiol and saturate at 0° C with HCl gas (take care to exclude water). Stir the solution in a sealed container forty-eight hours at room temperature and then basify with NaHC03. Extract with ether and dry, evaporate in vacuum (or dry and evaporate in vacuum two hours at 70/12 and distill at 130/0.001) to get about 5 g of the thioketal (V). Reflux 5.3 g (V), 100 g Raney-Ni, 2 L ethanol (or use NaBH4 procedure) for thirty hours. Cool and filter (Celite), evaporate in vacuum and distill residue (115/0.001) to get 3.7 g of the hexane which is saponified as described for the dimethyl ether of olivetol above to give about 2.5 g of the title compound (can distill 150/0.001). 

The trithiocarbonates may prove useful as intermediates for the synthesis of sugar dithiols from epoxides. Ring opening by reductive cleavage with lithium aluminum hydride gives excellent results with aliphatic and ahcyclic trithiocarbonates. When both carbon atoms are secondary, the product is a iraws-dithiol for example, cyclohexene oxide, which is converted into a irans-trithiocarbonate, gives, on reduction, cyclo-hexane-1,2-dithiol. The reaction has been used in the cyclitol series for the preparation of 1,2-dithio-neo-inositol and 1,2-dithio-ir-inositol, from 1,2-anhydro-alZo-inositol. The inositol trithiocarbonates show pronounced Cotton effects in their optical rotatory-dispersion spectra. 

Treatment of the dipotassium salt of 1,3,4-thiadiazole-2,5-dithiol with difunctional ligands, e.g., l,6-i>is(diphenylphosphino)hexane, a,a -fois(diphenylphosphino)-p-xylene, and 1,1 -fcis(diphenylphosphino)ferrocene, in a 1 1 ratio gave the desired cyclic (45-65 %), as well as oligomeric, dinuclear materials <01IC6266>. 

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