摘要
In this paper,a dual-ligand design strategy is demonstrated to modulate the performance of the electronically conductive metalorganic frameworks(EC-MOFs)thin film with a spray layer-by-layer assembly method.The thin film not only can be precisely prepared in nanometer scale(20-70 nm),but also shows the pin-hole-free smooth surface.The high quality nano-film of 2,3,6,7,10,11-hexaiminotriphenylene(HITP)doped Cu-HHTP enables the precise modulation of the chemiresistive sensitivity and selectivity.Selectivity improvement over 220%were realized for benzene vs.NH3>as well as enhanced response and recovery properties.In addition,the selectivity of the EC-MOF thin film sensors toward other gases(e.g.triethylamine,methane,ethylbenzene,hydrogen,butanone,and acetone)vs.NH3 at room temperature is also discussed.
基金
the National Natural Science Foundation of C hina(Nos.21801243,21822109,21975254,21773245,21850410462,21805276)
the Key Research Program of Frontier Science,CAS(No.QYZDB-SSW-SLH023)
China Postdoctoral Science Foundation(Nos.2018M642576,2018M642578)
International Partnership Program of CAS(No.121835KYSB201800),the Natural Science Foundation of Fujian Province(No.2019J01129)
the Youth Innovation Prom otion Association CAS.
