Novel n-conjugated polymers constituted of 2,1,3-benzothiadiazole or cyano-containing unit copolymers were synthesized and characterized by UV-Vis, IR and PL.
Poly（phenylene ethynylene）s （P1） with 4-vinylaniline pendant groups were successfully prepared by the Sonogashira coupling polymerization bevween 1,4-diethynyl-2,5-bis（pentyloxy）benzene and 4-[2-（2,5-dibromophe...Poly（phenylene ethynylene）s （P1） with 4-vinylaniline pendant groups were successfully prepared by the Sonogashira coupling polymerization bevween 1,4-diethynyl-2,5-bis（pentyloxy）benzene and 4-[2-（2,5-dibromophenyl）vinyl]- aniline. In comparison with its analogue P2 without amino group, the emission of F＇I is only enihanced by aggregation when adding n-hexane into its THF solution, exhibiting an aggregation-induced emission enhancement （AIEE） effect. When methanol or water instead of hexane was added into THF solution, P1, however, didn＇t show AII：~E. The results indicated that amino groups strengthen the inter-chain and intra-chain interactions in P1 and restrict the no^-radiative energy transition. This strategy can provide a platform for developing highly sensitive and efficient bio- and chemosensors.展开更多
Two copolymers of P1 and P2 comprising benzothiadiazole, 1,4-bis（dodecyloxy）-benzene units were synthesized by Sonogashira coupling polymerization based on ethynyl-linked 1,2,5,6-naphthalenediimide. Their thermal, o...Two copolymers of P1 and P2 comprising benzothiadiazole, 1,4-bis（dodecyloxy）-benzene units were synthesized by Sonogashira coupling polymerization based on ethynyl-linked 1,2,5,6-naphthalenediimide. Their thermal, optical, electrochemical as well as charge transport properties were studied. Bottom-gate top-contact organic field-effect transistors （OFETs） measurements of P1 and P2 thin films showed different charge transport behaviors. P1 displayed pure electron transport behaviors in OFETs with electron mobility up to 10^-3 cm^2·V-1·s^-1, while P2 exhibited hole transport features. The molecular structure analysis revealed that the structure of P1 has the acceptor-linker-acceptor＇ （A-L-A＇） characteristic, and P2 possesses the donor-linker-acceptor （D-L-A） structure feature. The results demonstrate that different molecular structures lead them to have distinct charge transport behaviors. In particular, the first pure electron transport copolymer in OFETs based on 1,2,5,6-naphthalenediimide is achieved.展开更多
Tremendous interest has been evoked in the utility of the fluorescent conjugated polymers towards the creation of ultra-sensitive systems based on the molecular wire effects which can amplify the transduction events. ...Tremendous interest has been evoked in the utility of the fluorescent conjugated polymers towards the creation of ultra-sensitive systems based on the molecular wire effects which can amplify the transduction events. Here, a series of new polymers pyridine substitute poly (phen- ylene ethynylene)s are synthesized by Sonogashira-Hagihara coupling reaction. The impact of structure modification on the physical properties and spectral characteristics of poly-mers has been investigated. The quenching studies are car-ried out and exhibit that recognition site (pyridyle group) highly influences the quenching efficiency. The results show that polymer PI with pyridyl group entrapped in the conju-gated backbone has the specific and sensitive response to Pd(Ⅱ). The fluorescence quenching of PⅠby Pd(Ⅱ) is about 65 times greater than that of model monomer.展开更多
基金We are gratefully acknowledged financial support of this work by the National Natural Science Foundation of China （No.20274039）.
文摘Novel n-conjugated polymers constituted of 2,1,3-benzothiadiazole or cyano-containing unit copolymers were synthesized and characterized by UV-Vis, IR and PL.
基金financially supported by the National Natural Scientific Foundation of China(Nos.51073026 and 21004004)the Specialized Research Fund for the Doctoral Program of Higher Education of China(Nos.2009110111003 l and 20101101120029)Excellent Young Scholars Research Fund of Beijing Institute of Technology(No.2009Y0914)
文摘Poly（phenylene ethynylene）s （P1） with 4-vinylaniline pendant groups were successfully prepared by the Sonogashira coupling polymerization bevween 1,4-diethynyl-2,5-bis（pentyloxy）benzene and 4-[2-（2,5-dibromophenyl）vinyl]- aniline. In comparison with its analogue P2 without amino group, the emission of F＇I is only enihanced by aggregation when adding n-hexane into its THF solution, exhibiting an aggregation-induced emission enhancement （AIEE） effect. When methanol or water instead of hexane was added into THF solution, P1, however, didn＇t show AII：~E. The results indicated that amino groups strengthen the inter-chain and intra-chain interactions in P1 and restrict the no^-radiative energy transition. This strategy can provide a platform for developing highly sensitive and efficient bio- and chemosensors.
基金financially supported by the National Natural Science Foundation of China(No.21674126)the"Strategic Priority Research Program"(No.XDB12010100)the Shanghai Science and Technology Committee(No.16JC1400603)
文摘Two copolymers of P1 and P2 comprising benzothiadiazole, 1,4-bis（dodecyloxy）-benzene units were synthesized by Sonogashira coupling polymerization based on ethynyl-linked 1,2,5,6-naphthalenediimide. Their thermal, optical, electrochemical as well as charge transport properties were studied. Bottom-gate top-contact organic field-effect transistors （OFETs） measurements of P1 and P2 thin films showed different charge transport behaviors. P1 displayed pure electron transport behaviors in OFETs with electron mobility up to 10^-3 cm^2·V-1·s^-1, while P2 exhibited hole transport features. The molecular structure analysis revealed that the structure of P1 has the acceptor-linker-acceptor＇ （A-L-A＇） characteristic, and P2 possesses the donor-linker-acceptor （D-L-A） structure feature. The results demonstrate that different molecular structures lead them to have distinct charge transport behaviors. In particular, the first pure electron transport copolymer in OFETs based on 1,2,5,6-naphthalenediimide is achieved.
文摘Tremendous interest has been evoked in the utility of the fluorescent conjugated polymers towards the creation of ultra-sensitive systems based on the molecular wire effects which can amplify the transduction events. Here, a series of new polymers pyridine substitute poly (phen- ylene ethynylene)s are synthesized by Sonogashira-Hagihara coupling reaction. The impact of structure modification on the physical properties and spectral characteristics of poly-mers has been investigated. The quenching studies are car-ried out and exhibit that recognition site (pyridyle group) highly influences the quenching efficiency. The results show that polymer PI with pyridyl group entrapped in the conju-gated backbone has the specific and sensitive response to Pd(Ⅱ). The fluorescence quenching of PⅠby Pd(Ⅱ) is about 65 times greater than that of model monomer.
