TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compositions: The composition is electrically and/or thermally conductive. The (6)-cycloparaphenylene rings are assembled to form nanotubes which are uniform in size and are straight. The nanotubes self-assemble to form a matrix containing nanopores with uniform diameter. Preparation (Disclosed): The cycloparaphenylene compound is prepared by adding ketone solution to slurry of sodium hydride in tetrahydrofuran, stirring the reaction mixture for 2 hours to generate the deprotonated ketone. In a separate 1000 mL flask, 4-bromo-4'((tert-butyldimethylsilyl)oxy)biphenyl is dissolved in dry tetrahydrofuran. The solution is cooled down to - 78 degrees C and n-butyl lithium is added slowly to the solution. The reaction mixture is allowed to stir for 30 mm at - 78 degrees C to give lithium reagent. The lithium reagent is transferred to the slurry containing deprotonated ketone cannula, and the resulting mixture is allowed to stir for another 2 hours at - 78 degrees C. Methyl iodide and dry dimethylformamide (DMF) are added to quench the addition reaction. The reaction mixture is allowed to warm up to room temperature and stir for overnight. About 400 ml water is added carefully to quench the methylation reaction, and the resulting mixture is extracted with diethyl ether. The combined organic layer is washed with water and brine and dried over sodium sulfate. SPECIFIC COMPOUNDS - 5 of 6 Compounds (I) are specifically disclosed, e.g. compounds of formulae (5)-(9).    EXAMPLE - The cycloparaphenylene compound was prepared by adding 30 g ketone solution to slurry of 5.88 g sodium hydride in 300 mL tetrahydrofuran (THF) at - 78 degrees C, stirring the reaction mixture for 2 hours to generate the deprotonated ketone. In a separate 1000 mL flask, 86 g 4-bromo-4'((tert-butyldimethylsilyl)oxy)biphenyl was dissolved in 500 mL dry THF. The solution was cooled down to - 78 degrees C and 100 ml n-butyl lithium was added slowly to the solution. The reaction mixture was allowed to stir for 30 mm at - 78 degrees C to give lithium reagent. The lithium reagent was transferred to the slurry containing deprotonated ketone cannula, and the resulting mixture was allowed to stir for another 2 hours at - 78 degrees C. 28.2 ml Methyl iodide and 200 ml dry dimethylformamide (DMF) were added to quench the addition reaction. The reaction mixture was allowed to warm up to room temperature and stir for overnight. About 400 ml water was added carefully to quench the methylation reaction, and the resulting mixture was extracted with diethyl ether. The combined organic layer was washed with 150 ml water and 200 ml brine and dried over sodium sulfate. After concentrating under reduced pressure, the crude product was purified by column on silica gel.