Crystalline cluster-assembled materials(CAMs)are emerging as types of exploratory fabrications due to their atomically precise structures and intriguing chemical/physical properties,as well as their lumines-cent funct...Crystalline cluster-assembled materials(CAMs)are emerging as types of exploratory fabrications due to their atomically precise structures and intriguing chemical/physical properties,as well as their lumines-cent function.展开更多
A new 1D silver cluster-assembled complex Ag_(10)bpy-CH_3CN exhibiting intense photoluminescence was reported. Upon the loss of coordinated acetonitrile, Ag_(10)bpy-CH_3CN form Ag_(10)bpy with Ag_(10)S_6 cores slightl...A new 1D silver cluster-assembled complex Ag_(10)bpy-CH_3CN exhibiting intense photoluminescence was reported. Upon the loss of coordinated acetonitrile, Ag_(10)bpy-CH_3CN form Ag_(10)bpy with Ag_(10)S_6 cores slightly distorted, being accompanied with photoluminescence quenching. Inverse process can be realized by treating Ag_(10)bpy with acetonitrile and shows a selectively erasable photoluminescent switch.展开更多
I. INTRODUCTION Recently, much attention is attracted to applying of isopropylidene malonates for organic synthesis. Refs. [1—4] reported a new synthetic method of 5-substitute isopropylidene malonates. There are 2,2...I. INTRODUCTION Recently, much attention is attracted to applying of isopropylidene malonates for organic synthesis. Refs. [1—4] reported a new synthetic method of 5-substitute isopropylidene malonates. There are 2,2,5,5-site substituents on 1,3-dioxan-4, 6-dione, which are chair conformations.展开更多
The intermetallic synergy plays a critical role in exploring the chemical-physical properties of metal nanoclusters.However,the controlled doping or layer-by-layer alloying of atom-precise metal nanoclusters(NCs)has l...The intermetallic synergy plays a critical role in exploring the chemical-physical properties of metal nanoclusters.However,the controlled doping or layer-by-layer alloying of atom-precise metal nanoclusters(NCs)has long been a challenging pursuit.In this work,two novel alloy nanoclusters[PPh_(4)]_(4)[Ag_(32)Cu_(18)(PFBT)_(36)]((AgCu)_(50))and[PPh_(4)]_(4)[Au_(12)Ag_(20)Cu_(18)(PFBT)_(36)](Au_(12)(AgCu)_(38)),where PFBT is pentafluorobenzenethiolate,with shell-by-shell configuration of M_(12)@Ag_(20)@Cu_(18)(PFBT)_(36)(M=Ag/Au)were synthesized by a facile one-pot co-reduction method.Notably,a fingerprint library of[Ag_(50)−xCux(PFBT)_(36)]^(4−)(x=0 to 50)from Ag_(50)to Cu_(50)has been successfully established as revealed by electrospray ionization mass spectrometry.Single-crystal X-ray diffraction analysis of trimetallic Au_(12)(AgCu)_(38)confirmed the layer-by-layer alloying under reducing conditions.What is more,(AgCu)_(50)and Au12(AgCu)_(38)both show broad photoluminescence(PL)peak in the second near-infrared(NIR-II)window,and the Au doping in the innermost shell considerably enhances the photoluminescence intensity.This work not only offers an insight in the process of metal cluster alloying but also provides a platform to study the doping-directed PL properties in the multimetallic cluster system.展开更多
Engineering the surface of the metal clusters with the core structure maintained and tuning their luminescence in a wide range is still a challenge in the nanomaterial research.We modified six mono-pyridyl ligands wit...Engineering the surface of the metal clusters with the core structure maintained and tuning their luminescence in a wide range is still a challenge in the nanomaterial research.We modified six mono-pyridyl ligands with different electronic effects(conjugation effect or induction effect)on a superatomic silver cluster[Ag_(14)(C_(2)B_(10)H_(10)S_(2))_(6)(CH_(3)CN)_(8)](denoted as Ag_(14))through in situ site-specific surface engineering.展开更多
基金This work was supported financially by the National Science Fund for Distinguished Young Scholars(21825106)the National Natural Science Foundation of China(21671175 and 21501150)+1 种基金the Program for Science&Technology Innovation Talents in Universities of Henan Province(164100510005)the Open Foundation of Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials,Guangxi University(2019GXYSOF12).
文摘Crystalline cluster-assembled materials(CAMs)are emerging as types of exploratory fabrications due to their atomically precise structures and intriguing chemical/physical properties,as well as their lumines-cent function.
基金supported by the National Natural Science Foundation of China (21671175)the Program for Science & Technology Innovation Talents in Universities of Henan Province (164100510005)the Program for Innovative Research Team (in Science and Technology) in Universities of Henan Province (19IRTSTHN022) and Zhengzhou University
文摘A new 1D silver cluster-assembled complex Ag_(10)bpy-CH_3CN exhibiting intense photoluminescence was reported. Upon the loss of coordinated acetonitrile, Ag_(10)bpy-CH_3CN form Ag_(10)bpy with Ag_(10)S_6 cores slightly distorted, being accompanied with photoluminescence quenching. Inverse process can be realized by treating Ag_(10)bpy with acetonitrile and shows a selectively erasable photoluminescent switch.
文摘I. INTRODUCTION Recently, much attention is attracted to applying of isopropylidene malonates for organic synthesis. Refs. [1—4] reported a new synthetic method of 5-substitute isopropylidene malonates. There are 2,2,5,5-site substituents on 1,3-dioxan-4, 6-dione, which are chair conformations.
基金supported by the National Natural Science Foundation of China(Nos.92061201,21825106,and 21801228)the Program for Innovative Research Team(in Science and Technology)in Universities of Henan Province(No.19IRTSTHN022)Zhengzhou University。
文摘The intermetallic synergy plays a critical role in exploring the chemical-physical properties of metal nanoclusters.However,the controlled doping or layer-by-layer alloying of atom-precise metal nanoclusters(NCs)has long been a challenging pursuit.In this work,two novel alloy nanoclusters[PPh_(4)]_(4)[Ag_(32)Cu_(18)(PFBT)_(36)]((AgCu)_(50))and[PPh_(4)]_(4)[Au_(12)Ag_(20)Cu_(18)(PFBT)_(36)](Au_(12)(AgCu)_(38)),where PFBT is pentafluorobenzenethiolate,with shell-by-shell configuration of M_(12)@Ag_(20)@Cu_(18)(PFBT)_(36)(M=Ag/Au)were synthesized by a facile one-pot co-reduction method.Notably,a fingerprint library of[Ag_(50)−xCux(PFBT)_(36)]^(4−)(x=0 to 50)from Ag_(50)to Cu_(50)has been successfully established as revealed by electrospray ionization mass spectrometry.Single-crystal X-ray diffraction analysis of trimetallic Au_(12)(AgCu)_(38)confirmed the layer-by-layer alloying under reducing conditions.What is more,(AgCu)_(50)and Au12(AgCu)_(38)both show broad photoluminescence(PL)peak in the second near-infrared(NIR-II)window,and the Au doping in the innermost shell considerably enhances the photoluminescence intensity.This work not only offers an insight in the process of metal cluster alloying but also provides a platform to study the doping-directed PL properties in the multimetallic cluster system.
基金This work was supported by the National Science Fund for Distinguished Young Scholars(No.21825106)the National Natural Science Foundation of China(No.21671175)the Program for Innovative Research Team(in Science and Technology)in Universities of Henan Province(No.19IRTSTHN022)and Zhengzhou University.
文摘Engineering the surface of the metal clusters with the core structure maintained and tuning their luminescence in a wide range is still a challenge in the nanomaterial research.We modified six mono-pyridyl ligands with different electronic effects(conjugation effect or induction effect)on a superatomic silver cluster[Ag_(14)(C_(2)B_(10)H_(10)S_(2))_(6)(CH_(3)CN)_(8)](denoted as Ag_(14))through in situ site-specific surface engineering.
