Ordered mesoporous materials have demonstrated con-siderable potential in various fields,such as catalysis,separation,and biomedical applications.Fabricating such materials has garnered extensive attention.How-ever,cu...Ordered mesoporous materials have demonstrated con-siderable potential in various fields,such as catalysis,separation,and biomedical applications.Fabricating such materials has garnered extensive attention.How-ever,current investigations of mesoporous materials predominantly focus on high porosity and related appli-cations,often neglecting the development of mesopor-ous materials possessing additional functions.Here,we report the fabrication of ordered mesoporous magnetic ceramics by pyrolyzing single-source self-assembled giant molecules,constructed by dihydroxyl-functiona-lized polyhedral oligomeric silsequioxane,polystyrene,and ferrocene.Hexagonally ordered magnetic ceramics with high surface areas and uniform pore sizes were obtained after the pyrolysis.Magnetization measure-ments revealed the ferromagnetic nature of the ceramic products.Shaped magnetic ceramic monoliths and magnetic ceramic thin films can be fabricated by pro-cessing the precursor giant molecules.Additionally,the mesoporous magnetic ceramics exhibit exceptional adsorption capacity and facile separability,making them suitable for water pollutant removal applications.展开更多
Naturally,subtle variations in the chemical structures of constituent molecules may significantly affect their multiscale spatial arrangements,properties,and functions.Deceptively simple spherical assemblies supply an...Naturally,subtle variations in the chemical structures of constituent molecules may significantly affect their multiscale spatial arrangements,properties,and functions.Deceptively simple spherical assemblies supply an ideal platform to investigate how subtle chemical differences affect hierarchically assembled structures.Here,the authors report two sets of nanosized shape amphiphiles,which were constructed by a triphenylene core and six polyhedral oligomeric silsesquioxane cages peripherally grafted through linkers.The slight differences in these samples are merely several methylene units in their linkers,including several pairs of constituent isomers.These nanosized shape amphiphiles self-assemble into a variety of unconventional spherical packing structures,which include the Frank-Kasperσphase and dodecagonal quasicrystal.Several types of unconventional phase transitions were systematically investigated.The authors alternated the conventional columnar phases of discotic molecules to unconventional spherical packing phases.These unconventional structures may shed light into discovering discotic mesogens-based materials with new properties and functions.展开更多
基金the National Science Foundation(grant no.DMR-1408872)the Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices(grant no.2019B121203003)+2 种基金the Recruitment Program of Guangdong(grant no.2016ZT06C322)the Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials,the 75th China Postdoctoral Science Foundation(grant no.2024M750939)the Major Program of National Natural Science Foundation of China(grant no.51890871).
文摘Ordered mesoporous materials have demonstrated con-siderable potential in various fields,such as catalysis,separation,and biomedical applications.Fabricating such materials has garnered extensive attention.How-ever,current investigations of mesoporous materials predominantly focus on high porosity and related appli-cations,often neglecting the development of mesopor-ous materials possessing additional functions.Here,we report the fabrication of ordered mesoporous magnetic ceramics by pyrolyzing single-source self-assembled giant molecules,constructed by dihydroxyl-functiona-lized polyhedral oligomeric silsequioxane,polystyrene,and ferrocene.Hexagonally ordered magnetic ceramics with high surface areas and uniform pore sizes were obtained after the pyrolysis.Magnetization measure-ments revealed the ferromagnetic nature of the ceramic products.Shaped magnetic ceramic monoliths and magnetic ceramic thin films can be fabricated by pro-cessing the precursor giant molecules.Additionally,the mesoporous magnetic ceramics exhibit exceptional adsorption capacity and facile separability,making them suitable for water pollutant removal applications.
基金This study was supported by the Key-Area Research and Development Program of Guangdong Province(nos.2019B010941002 and 2020B010182002)the National Natural Science Foundation of China(nos.71890871 and U1832220)+2 种基金the Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices(no.2019B121203003)Guangdong Project(no.2016ZT06C322)the Fundamental Research Funds for the Central Universities(no.2019JQ05).
文摘Naturally,subtle variations in the chemical structures of constituent molecules may significantly affect their multiscale spatial arrangements,properties,and functions.Deceptively simple spherical assemblies supply an ideal platform to investigate how subtle chemical differences affect hierarchically assembled structures.Here,the authors report two sets of nanosized shape amphiphiles,which were constructed by a triphenylene core and six polyhedral oligomeric silsesquioxane cages peripherally grafted through linkers.The slight differences in these samples are merely several methylene units in their linkers,including several pairs of constituent isomers.These nanosized shape amphiphiles self-assemble into a variety of unconventional spherical packing structures,which include the Frank-Kasperσphase and dodecagonal quasicrystal.Several types of unconventional phase transitions were systematically investigated.The authors alternated the conventional columnar phases of discotic molecules to unconventional spherical packing phases.These unconventional structures may shed light into discovering discotic mesogens-based materials with new properties and functions.
