The geometry and the energy of conformers of PnHn+2(n=2-9) have been studied with PM3 method. It is concluded that gauche interaction between adjacent lone electron pairs and gauche interaction between P-H bond with a...The geometry and the energy of conformers of PnHn+2(n=2-9) have been studied with PM3 method. It is concluded that gauche interaction between adjacent lone electron pairs and gauche interaction between P-H bond with adjacent P-P bond are important for predicting the stable conformer of open-chain phosphoanes.展开更多
1 Results Over the past few years significant research has been directed toward the development of organic materials for potential application in molecular photonic devices[1] and the development of sensors[2].Interes...1 Results Over the past few years significant research has been directed toward the development of organic materials for potential application in molecular photonic devices[1] and the development of sensors[2].Interest in these materials is primarily due to the infinite numbers of possible molecular structures with the desired properties,by virtue of the tremendous capabilities of organic synthesis.For the development of a new fluorescent molecular sensor consisting of a recognition moiety linked to a f...展开更多
The relationships between the phosphine content and various microbial populations,activities of different enzymes were investigated firstly.The results indicated that the phosphine content of samples from various envi...The relationships between the phosphine content and various microbial populations,activities of different enzymes were investigated firstly.The results indicated that the phosphine content of samples from various environments was positively related to total anaerobic microorganisms,organic phosphate compound-dissolving bacteria,denitrifying bacteria,and the activities of alkaline phosphatase and dehydrogenase,with correlation coefficients (R^2) up to 0.93,0.90,0.69,0.79,and 0.82,respectively.Results also sh...展开更多
Comprehensive Summary This paper presents the first general examples of palladium-catalyzed desulfinative cross-coupling reaction of polyhalogenated aryl triflates with aryl sulfinate salts showing an inversion of the...Comprehensive Summary This paper presents the first general examples of palladium-catalyzed desulfinative cross-coupling reaction of polyhalogenated aryl triflates with aryl sulfinate salts showing an inversion of the conventional reactivity order of C-Br>C-Cl>C-OTf.The catalyst system,comprising of Pd(OAc)_(2)and tBuPhSelectPhos,exhibited excellent catalytic reactivity and chemoselectivity toward this reaction.This reaction had a wide range of substrate scopes and provided a simple and efficient method for the construction of functionalized biaryl motifs.Notably,the C-H···Pd interaction from the methine hydrogen of the C2-cyclohexyl group of the indolyl phosphine ligand with the Pd center may contribute a key factor in reactivity and chemoselectivity.Assisting with density functional theory(DFT)calculations,the results revealed that the oxidative addition step in this reaction was a controlling-chemoselectivity step.展开更多
文摘The geometry and the energy of conformers of PnHn+2(n=2-9) have been studied with PM3 method. It is concluded that gauche interaction between adjacent lone electron pairs and gauche interaction between P-H bond with adjacent P-P bond are important for predicting the stable conformer of open-chain phosphoanes.
文摘1 Results Over the past few years significant research has been directed toward the development of organic materials for potential application in molecular photonic devices[1] and the development of sensors[2].Interest in these materials is primarily due to the infinite numbers of possible molecular structures with the desired properties,by virtue of the tremendous capabilities of organic synthesis.For the development of a new fluorescent molecular sensor consisting of a recognition moiety linked to a f...
文摘The relationships between the phosphine content and various microbial populations,activities of different enzymes were investigated firstly.The results indicated that the phosphine content of samples from various environments was positively related to total anaerobic microorganisms,organic phosphate compound-dissolving bacteria,denitrifying bacteria,and the activities of alkaline phosphatase and dehydrogenase,with correlation coefficients (R^2) up to 0.93,0.90,0.69,0.79,and 0.82,respectively.Results also sh...
基金the Research Grants Council of the Hong Kong Special Administrative Region,China(PolyU 15302821,15300220,and 25301819)the National Natural Science Foundation of China(21972122)for their financial support.
文摘Comprehensive Summary This paper presents the first general examples of palladium-catalyzed desulfinative cross-coupling reaction of polyhalogenated aryl triflates with aryl sulfinate salts showing an inversion of the conventional reactivity order of C-Br>C-Cl>C-OTf.The catalyst system,comprising of Pd(OAc)_(2)and tBuPhSelectPhos,exhibited excellent catalytic reactivity and chemoselectivity toward this reaction.This reaction had a wide range of substrate scopes and provided a simple and efficient method for the construction of functionalized biaryl motifs.Notably,the C-H···Pd interaction from the methine hydrogen of the C2-cyclohexyl group of the indolyl phosphine ligand with the Pd center may contribute a key factor in reactivity and chemoselectivity.Assisting with density functional theory(DFT)calculations,the results revealed that the oxidative addition step in this reaction was a controlling-chemoselectivity step.
