The first postsynthetic solution-based crystal transformation of two-dimensional metal halide perovskites(2D MHPs)through organothiol-based reactions is reported.It is well-established that the crystal formation from ...The first postsynthetic solution-based crystal transformation of two-dimensional metal halide perovskites(2D MHPs)through organothiol-based reactions is reported.It is well-established that the crystal formation from a solution containing predesigned metal ion and organic cation precursors produces well-defined 2D MHPs with various intercalating organic cations.However,few reports outlining the postsynthetic crystal transformation of 2D MHPs have appeared.Here,we report that,upon organothiol-based redox or condensation reactions,large organic cations in three types of 2D MHPs can interconvert under ambient conditions without damage to the layered inorganic framework.The swift and complete crystal interconversion has been confirmed using combined techniques including X-ray diffraction and ^(13)C nuclear magnetic resonance(^(13)C NMR)spectroscopy.Electronic structures of the MHPs were investigated using computational chemistry.展开更多
基金All calculations were carried out using the Tianhe-2(TH-2)super computer clusters(Guangzhou,Guangdong,China).Z.Y.would like to acknowledge financial support from the National Natural Science Foundation of China(no.21905316)the Department of Science and Technology of Guangdong Province(no.2019QN01C108)+1 种基金Sun Yat-sen University.Profs.P.Hu,T.Zhu,and Z.W.Wei are thanked for valuable suggestions.T.Z.thanks York University for the start-up grant(no.481333)the Natural Sciences and Engineering Research Council(NSERC)of Canada(no.RGPIN-2016-06276)for financial support.
文摘The first postsynthetic solution-based crystal transformation of two-dimensional metal halide perovskites(2D MHPs)through organothiol-based reactions is reported.It is well-established that the crystal formation from a solution containing predesigned metal ion and organic cation precursors produces well-defined 2D MHPs with various intercalating organic cations.However,few reports outlining the postsynthetic crystal transformation of 2D MHPs have appeared.Here,we report that,upon organothiol-based redox or condensation reactions,large organic cations in three types of 2D MHPs can interconvert under ambient conditions without damage to the layered inorganic framework.The swift and complete crystal interconversion has been confirmed using combined techniques including X-ray diffraction and ^(13)C nuclear magnetic resonance(^(13)C NMR)spectroscopy.Electronic structures of the MHPs were investigated using computational chemistry.
