Photochromism in spiropyran impregnated fluorinated mesoporous organosilicate films

Characterization and mesostructure control of mesoporous fluorinated organosilicate films

Mesoporous fluorinated organosilicate films were synthesized from tetramethoxysilane and perfluoroalkylsilanes (RO)3Si-R’ [R ~ Me, Et; R’ ~ (CH2)2CF3, (CH2)2(CF2)5CF3, or (CH2)2(CF2)7CF3] under acidic conditions in the presence of cetyltrimethylammonium chloride (CTACl) by sol–gel spin-coating. Calcination at 350 uC allowed the removal of surfactants without destroying the other organic content...

Photochromism of Spiropyran in UHV-Prepared Thin Films

Synthesis of Mesoporous Organosilicate Films in Supercritical Carbon Dioxide

strate for the resist. After spin-coating, the polymer was gently softbaked at 40 °C to evaporate the solvent. The SU-8 was then structured by UV lithography (k= 365 nm) and post-exposure-baked at 40 °C to polymerize the exposed material. Three-dimensional microsystems were achieved by adding further SU-8 layers and repeating the resist processing steps. The microdevices were finally developed ...

Photoluminescence of mesoporous silica films impregnated with an erbium complex

Transparent mesoporous silica films were prepared by sol-gel spin coating on silicon wafers at room temperature. An erbium complex, erbium tris 8-hydroxyquinoline (ErQ), was homogeneously impregnated into the pores of the mesoporous silica films, and its concentration was easily controlled by using a solution immersing technique. The ErQ-impregnated mesoporous silica films show a room-temperatu...

Reversible photochromism of polynorbornenes bearing spiropyran side groups

ABSTRACT In this paper, the synthesis and characterization of poly(norbornene) homo- and copolymers bearing spiropyran side groups are described. Difficulties in the homopolymerization of spiropyrans due to the opened merocyanine form were observed leading to low polymerization yields for homopolymers while copolymers with 10 mol% spiropyran content were prepared in good yield. Spiropyrans are ...