Two amphiphilic TPE E/Z isomers with aggregation induced emission(AIE)property have been synthesized and characterized.The logarithmic fluorescent intensity of the two molecules was in positive relationship with logar...Two amphiphilic TPE E/Z isomers with aggregation induced emission(AIE)property have been synthesized and characterized.The logarithmic fluorescent intensity of the two molecules was in positive relationship with logarithmic viscosity of liquid.To note,the Z-TPE isomer exhibited more sensitivity in the viscosity of liquid sensing in comparison with the corresponding E-TPE counterpart(around 1.80 folds).Furthermore,two molecules could be used as fluorescent sensors for mechanical properties(viscosity and storage modulus)of hydrogel as well.In addition,two sensors displayed low cytotoxicity in normal tissue cell line(L929)within the concentration range of 2–10μmol/L.These results potentially promised their applications as fluorescent sensors for mechanical properties in the fields of biological and biomedical.展开更多
We present a method by which to determine the bulk viscosity of water from pulse duration measurements of stimulated Brillouin scattering （SBS）. Beginning from a common model of Brillouin scattering, the bulk viscos...We present a method by which to determine the bulk viscosity of water from pulse duration measurements of stimulated Brillouin scattering （SBS）. Beginning from a common model of Brillouin scattering, the bulk viscosity is shown to play an important role in Brillouin linewidth determination. Pulse durations of SBS back-reflected optical pulses are measured over the temperature range of 5-40℃. SBS linewidths are de- termined via Fourier transformation of the time-domain results, and the bulk viscosity of water is measured and derived from the obtained values. Our results show that the proposed method for measurement of pulse durations is an effective approach for determining bulk viscosity. The method can be easily extended to determine bulk viscosities of other Newtonian liquids.展开更多
基金National Natural Science Foundation of China(Nos.21375116,21978251,22073080)Nature Science Foundation of Jiangsu Province(Nos.BK20190903,BK20190905)+2 种基金A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions for financial supportThe open funds of the Ministry of Education Key Lab for Avian Preventive Medicine(No.YF202020)the Thousand Talents Plan for Young Professionals of China。
文摘Two amphiphilic TPE E/Z isomers with aggregation induced emission(AIE)property have been synthesized and characterized.The logarithmic fluorescent intensity of the two molecules was in positive relationship with logarithmic viscosity of liquid.To note,the Z-TPE isomer exhibited more sensitivity in the viscosity of liquid sensing in comparison with the corresponding E-TPE counterpart(around 1.80 folds).Furthermore,two molecules could be used as fluorescent sensors for mechanical properties(viscosity and storage modulus)of hydrogel as well.In addition,two sensors displayed low cytotoxicity in normal tissue cell line(L929)within the concentration range of 2–10μmol/L.These results potentially promised their applications as fluorescent sensors for mechanical properties in the fields of biological and biomedical.
基金supported by the National Natural Sci-ence Foundation of China under Grants Nos.41206084 and 61177096
文摘We present a method by which to determine the bulk viscosity of water from pulse duration measurements of stimulated Brillouin scattering （SBS）. Beginning from a common model of Brillouin scattering, the bulk viscosity is shown to play an important role in Brillouin linewidth determination. Pulse durations of SBS back-reflected optical pulses are measured over the temperature range of 5-40℃. SBS linewidths are de- termined via Fourier transformation of the time-domain results, and the bulk viscosity of water is measured and derived from the obtained values. Our results show that the proposed method for measurement of pulse durations is an effective approach for determining bulk viscosity. The method can be easily extended to determine bulk viscosities of other Newtonian liquids.
