mer was synthesized by living anionic polymerization at ±78 C in tetrahydrofuran [7]. For quaternization, the PS-P2VP diblock copolymer was dissolved in methyl ethyl ketone (10 mg mL ±1 ). A fivefold molar excess of iodomethane was added to the polymer solution whilst stirring for 5 d. The completely quarternized solution was poured into hexane to precipitate the quaternized polymer, and then the product was washed with pure hexane more than three times. The PSP2VP´MeI, obtained as a powder, was dried under vacuum at 60 C for 2 d. The product was then dispersed in toluene (1.25 mg mL ±1 ) by ultrasonication. Under ambient conditions (22 C, relative humidity about 30 %), drops of the polymer nanoparticle dispersion in toluene were spread on water in a Petri dish in a controlled manner. The number of drops added was just enough for the light-yellow, oily film to cover the entire water surface. Slide glass (Marienfeld, Lauda-Koenigshofen, Germany) was cut into rectangular pieces (0.5 cm 1.0 cm) before use. The glass Petri dish was cleaned with acetone, ethanol, and distilled water (18 MX), with sonication for 1 h in each step. The dish was then dried at 110 C.Measurements: The extent of quaternization was determined by Fourier-transform infrared spectroscopy (Perkin-Elmer System 2000). An energy-filtering transmission electron microscope (Zeiss EF-TEM, EM 912 OMEGA) operating at 120 kV was used for imaging the particles (exposed to I 2 vapor for 10 h). The polymeric nanoparticle monolayers and porous titania layers were characterized with a field-emission scanning electron microscope (FE-SEM, Hitachi S-4700) operating at 10 kV. Iron-containing microporous molecular sieves have been attracting considerable attention due to their remarkable activity as catalysts for the reduction of nitrous oxides, [1] oxidation of benzene to phenol, [2] and the selective oxidation of methane.[3] However, they are not useful for treating heavier feeds and the production of more bulky fine chemicals, owing to their small pore size. The discovery of mesoporous molecular sieves has expanded the available pore sizes of zeolites and zeotypes into the mesopore range, thus, revealing new possibilities in the catalytic transformation of large molecules. Mesoporous materials synthesized using cationic, [4] anionic, [5] non-ionic, [6] and lizard-type surfactants [7] possess well-ordered pore structures (hexagonal, cubic and lamellar) with high specific surface areas and high specific pore volumes. However, mesoporous materials with three-dimensional pore systems are more resistant to pore blocking and allow a faster diffusion of reactants than a one-dimensional array of pores. Huo et al. [8] have synthesized a novel mesoporous molecular sieve with a three-dimensional cubic structure (space group Pm3n) of uniform pore size. The novel material, denoted SBA-1, has a cage-type structure with open windows, and was prepared under acidic conditions using cetyltriethy-COMMUNICATIONS