Butterfly-like calcium carbonate（CaCO3） particles were successfully prepared via a facile precipitation reaction of Na2CO3 with CaCI2 in the presence of sodium polyacrylate（PAAS）. The as-prepared samples were cha-...Butterfly-like calcium carbonate（CaCO3） particles were successfully prepared via a facile precipitation reaction of Na2CO3 with CaCI2 in the presence of sodium polyacrylate（PAAS）. The as-prepared samples were cha- racterized with field emission scanning electron microscopy（FESEM）, X-ray diffraction（XRD） and Fourier transform infrared spectroscopy（FTIR）. Butterfly-like CaCO3 particles composed of three segment rods were obtained. Rod aggregates would act as the template for butterfly-like CaCO3 crystals consisted of regular shaped crystallites with 150--200 nm in diameter. The influences of reaction temperature, the amount of PAAS and reaction time on the nucleation and growth of CaCO3 crystals were investigated. The possible growth mechanism of CaCO3 crystals was discussed. This research can not onty make us further understand the general principles of the reaction, but also open up a new avenue of industrial production of CaCO3 particles with exquisite and unique morphologies.展开更多
Developing novel emissive supramolecular assemblies with elegant architectures and tunable perfor-mance remains highly desirable yet challenging.Herein,we report the design and synthesis of several 9.10-bis(diphenylme...Developing novel emissive supramolecular assemblies with elegant architectures and tunable perfor-mance remains highly desirable yet challenging.Herein,we report the design and synthesis of several 9.10-bis(diphenylmethylene)-9.10-dihydroanthracene-based metal organic assembles with aggregation-induced emission characteristics.Such assemblies feature intriguing thermochromic and mechanochromic properties,ie.,distinguishable fuorescence responses in terms of emission wavelength and intensity un-der variable temperatures and pressures.Moreover,these assemblies can serve as excellent fluorescent sensors for the detection of polysaccharide molecules.Due to the differentiated charge type and den-sity,the assembles display distinct sensing mechanisms toward different polysaccharide molecules.This study provides novel perspectives for the synthesis of buttrfly-like platinum(I)supramolecular coordi-nation complexes with multistimuli-responsiveness for polysaccharide sensing.which will facllitate the development of stimuli-responsive materials.展开更多
基金Supported by the National Natural Science Foundation of China（No.21077041）, ＂the Twelfth Five＂ Science Technology Research of Jilin Education Hall, China（No.2013[204]） and the Scientific Research Innovation Plan for Young Talented Person of Jilin Normal University, China（No.2011 [05]）.
文摘Butterfly-like calcium carbonate（CaCO3） particles were successfully prepared via a facile precipitation reaction of Na2CO3 with CaCI2 in the presence of sodium polyacrylate（PAAS）. The as-prepared samples were cha- racterized with field emission scanning electron microscopy（FESEM）, X-ray diffraction（XRD） and Fourier transform infrared spectroscopy（FTIR）. Butterfly-like CaCO3 particles composed of three segment rods were obtained. Rod aggregates would act as the template for butterfly-like CaCO3 crystals consisted of regular shaped crystallites with 150--200 nm in diameter. The influences of reaction temperature, the amount of PAAS and reaction time on the nucleation and growth of CaCO3 crystals were investigated. The possible growth mechanism of CaCO3 crystals was discussed. This research can not onty make us further understand the general principles of the reaction, but also open up a new avenue of industrial production of CaCO3 particles with exquisite and unique morphologies.
基金supported by the National Natural Science Foundation of China(Nos.22171219 and 22222112)Innovation Talent Promotion Plan of Shaanxi Province for Science and Technology Innovation Team(2023-CX-TD-51)the Fundamental Research Funds for the Central Universities.
文摘Developing novel emissive supramolecular assemblies with elegant architectures and tunable perfor-mance remains highly desirable yet challenging.Herein,we report the design and synthesis of several 9.10-bis(diphenylmethylene)-9.10-dihydroanthracene-based metal organic assembles with aggregation-induced emission characteristics.Such assemblies feature intriguing thermochromic and mechanochromic properties,ie.,distinguishable fuorescence responses in terms of emission wavelength and intensity un-der variable temperatures and pressures.Moreover,these assemblies can serve as excellent fluorescent sensors for the detection of polysaccharide molecules.Due to the differentiated charge type and den-sity,the assembles display distinct sensing mechanisms toward different polysaccharide molecules.This study provides novel perspectives for the synthesis of buttrfly-like platinum(I)supramolecular coordi-nation complexes with multistimuli-responsiveness for polysaccharide sensing.which will facllitate the development of stimuli-responsive materials.
