Integrating catalytic reactions with molecular assembly is a promising means of achieving controllable supramolecular polymerization.We report herein a novel and controllable method for in situ supramolecular polymeri...Integrating catalytic reactions with molecular assembly is a promising means of achieving controllable supramolecular polymerization.We report herein a novel and controllable method for in situ supramolecular polymerization via organometallic-catalyzed macromolecular metamorphosis.To this end,covalent polymers with polypentenamer backbones and pendant supramolecular motifs are designed and synthesized.By depolymerizing the polymers with Grubbs catalysts,the supramolecular motifs can be gradually released from the polymers to the solution.Supramolecular polymerization occurs when a critical concentration is reached.The supramolecular polymerization process was readily controlled by varying the rate of the depolymerization reaction.This work presents a novel approach that uses organometallic catalysis to transform covalent polymers into supramolecular polymers.It offers a new means of constructing complex molecular systems in a controllable manner.展开更多
The objective of this study is to provide a case study of informetric and bibliometric analysis,by building up a profile for the journal of Reliability Engineering&System Safety in the 21st century,based on the da...The objective of this study is to provide a case study of informetric and bibliometric analysis,by building up a profile for the journal of Reliability Engineering&System Safety in the 21st century,based on the data collected in Web of Science and the tool of VOSViewer.4821 articles published in the journal in 2001-2021 have been adopted as the dataset.The keywords of these articles are analyzed and clustered,the main applications of these studies are identified,and the temporal development trend of the topics are discussed.The most productive countries/regions,institutions and individual researchers for the journal are presented and the collaboration relationships at the national and institutional levels are investigated and visualized.Distribution of author genders is surveyed based on a sample.Then,the citation situation of articles in the journal is analyzed,and the potential impact factors on citations,including number of authors,number of participating institutions and countries/regions,number of references,and topics are studied.Finally,evidence on whether open access can influence citations of articles is provided.Readers of this article are expected to understand more about how bibliometric analysis support journal analysis and development analysis in a certain domain.展开更多
基金We gratefully acknowledge the financial support from National Key R&D Program of China(grant no.2021YFA1501600)National Natural Science Foundation of China(grant no.21901077)+2 种基金Natural Science Foundation of Guangdong Province(grant no.2016ZT06C322)Open Project of State Key Laboratory for Supramolecular Structure and Materials(grant no.SKLSSM2021012)the Research Fund Program of Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices(grant no.2019B121203003).
文摘Integrating catalytic reactions with molecular assembly is a promising means of achieving controllable supramolecular polymerization.We report herein a novel and controllable method for in situ supramolecular polymerization via organometallic-catalyzed macromolecular metamorphosis.To this end,covalent polymers with polypentenamer backbones and pendant supramolecular motifs are designed and synthesized.By depolymerizing the polymers with Grubbs catalysts,the supramolecular motifs can be gradually released from the polymers to the solution.Supramolecular polymerization occurs when a critical concentration is reached.The supramolecular polymerization process was readily controlled by varying the rate of the depolymerization reaction.This work presents a novel approach that uses organometallic catalysis to transform covalent polymers into supramolecular polymers.It offers a new means of constructing complex molecular systems in a controllable manner.
基金supported by the National Natural Science Foundation of China(NO.51904185 and 51874042)
文摘The objective of this study is to provide a case study of informetric and bibliometric analysis,by building up a profile for the journal of Reliability Engineering&System Safety in the 21st century,based on the data collected in Web of Science and the tool of VOSViewer.4821 articles published in the journal in 2001-2021 have been adopted as the dataset.The keywords of these articles are analyzed and clustered,the main applications of these studies are identified,and the temporal development trend of the topics are discussed.The most productive countries/regions,institutions and individual researchers for the journal are presented and the collaboration relationships at the national and institutional levels are investigated and visualized.Distribution of author genders is surveyed based on a sample.Then,the citation situation of articles in the journal is analyzed,and the potential impact factors on citations,including number of authors,number of participating institutions and countries/regions,number of references,and topics are studied.Finally,evidence on whether open access can influence citations of articles is provided.Readers of this article are expected to understand more about how bibliometric analysis support journal analysis and development analysis in a certain domain.
