Nowadays organosilicon luminescent materials are of increasing interest due to the variety of their synthetic or modification techniques and application fields.Ladder polyphenylsilsesquioxanes(L-PPSQ)are a unique clas...Nowadays organosilicon luminescent materials are of increasing interest due to the variety of their synthetic or modification techniques and application fields.Ladder polyphenylsilsesquioxanes(L-PPSQ)are a unique class of organosilicon polymers,which can be ideal matrices for the luminescent composites due to their high thermal stability,optical transparency and mechanical strength.In this work,new mechanically strong,heat-resistant,transparent and sensitive to ammonia vapor luminescent composite films based on L-PPSQ have been obtained.As the source of Europium ions oligophenyleuropiumsiloxane was used,demonstrating perfect compatibility to the matrix due to the similar nature.To improve luminescent properties of the films,new organosilicon ligands were introduced into the composites and their influence on the properties of the materials was studied.Valuable properties of described composites may allow their further application as multifunctional coatings.展开更多
A novel photonic composite film based on a luminescent dicyanodistyrylbenzene-based liquid crystal polymer network（LCN） was fabricated by using a silica colloidal crystal as a template. The upper part of inverse opa...A novel photonic composite film based on a luminescent dicyanodistyrylbenzene-based liquid crystal polymer network（LCN） was fabricated by using a silica colloidal crystal as a template. The upper part of inverse opal structure and the luminescence characteristics of dicyanodistyrylbenzene-based moiety endowed the resulting bilayer photonic film with structural color arising from coherent Bragg reflection and fluorescence properties, respectively. A fluorescence enhancement phenomenon was observed in the photonic film due to the overlap between the reflection band and emission band of the fluorescent LCN. More importantly, the photo-induced irreversible Z/E photoisomerization of dicyanodistyrylbenzene-based moiety in the photonic film led to both a reflection spectral shift and an observable fluorescence variation. On the basis of this effective phototuning process, microscopic patterning of photonic film was developed under both fluorescence mode and reflection mode. The work demonstrated here provides a new route to construct photo-responsive photonic film.展开更多
A novel type sandwich-like composite films composed of ZIF-8 and CdTe QDs were successfully constructed through facile layer-by-layer assembly strategy and their potential applications were also explored.Based on the ...A novel type sandwich-like composite films composed of ZIF-8 and CdTe QDs were successfully constructed through facile layer-by-layer assembly strategy and their potential applications were also explored.Based on the limitation effects of the aperture of ZIF-8,CdTe QDs/ZIF-8 fluorescent composite films exhibit obvious selective optical response toward hydrogen peroxide and folic acid.Furthermore,tunable colorful light emission composite films in the red-green region are obtained through incorporating two different sized QDs and ZIF-8 films into one composite films.展开更多
基金financially supported by the Russian Science Foundation(No.23-79-10256)。
文摘Nowadays organosilicon luminescent materials are of increasing interest due to the variety of their synthetic or modification techniques and application fields.Ladder polyphenylsilsesquioxanes(L-PPSQ)are a unique class of organosilicon polymers,which can be ideal matrices for the luminescent composites due to their high thermal stability,optical transparency and mechanical strength.In this work,new mechanically strong,heat-resistant,transparent and sensitive to ammonia vapor luminescent composite films based on L-PPSQ have been obtained.As the source of Europium ions oligophenyleuropiumsiloxane was used,demonstrating perfect compatibility to the matrix due to the similar nature.To improve luminescent properties of the films,new organosilicon ligands were introduced into the composites and their influence on the properties of the materials was studied.Valuable properties of described composites may allow their further application as multifunctional coatings.
基金financially supported by the National Natural Science Foundation of China (Nos. 51773009, 51573012 and 51373013)
文摘A novel photonic composite film based on a luminescent dicyanodistyrylbenzene-based liquid crystal polymer network（LCN） was fabricated by using a silica colloidal crystal as a template. The upper part of inverse opal structure and the luminescence characteristics of dicyanodistyrylbenzene-based moiety endowed the resulting bilayer photonic film with structural color arising from coherent Bragg reflection and fluorescence properties, respectively. A fluorescence enhancement phenomenon was observed in the photonic film due to the overlap between the reflection band and emission band of the fluorescent LCN. More importantly, the photo-induced irreversible Z/E photoisomerization of dicyanodistyrylbenzene-based moiety in the photonic film led to both a reflection spectral shift and an observable fluorescence variation. On the basis of this effective phototuning process, microscopic patterning of photonic film was developed under both fluorescence mode and reflection mode. The work demonstrated here provides a new route to construct photo-responsive photonic film.
基金financially supported by the National Key Research and Development Program of China(No.2018YFA0704502)financial support of the National Natural Science Foundation of China(Nos.22033008,21871263 and 22071245)Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(No.2021ZZ103)。
文摘A novel type sandwich-like composite films composed of ZIF-8 and CdTe QDs were successfully constructed through facile layer-by-layer assembly strategy and their potential applications were also explored.Based on the limitation effects of the aperture of ZIF-8,CdTe QDs/ZIF-8 fluorescent composite films exhibit obvious selective optical response toward hydrogen peroxide and folic acid.Furthermore,tunable colorful light emission composite films in the red-green region are obtained through incorporating two different sized QDs and ZIF-8 films into one composite films.
