THIS year marks the 20th anniversary of the vision“lucid waters and lush mountains are invaluable assets,”which reveals the intrinsic link between economic development and ecological protection.As the birthplace of ...THIS year marks the 20th anniversary of the vision“lucid waters and lush mountains are invaluable assets,”which reveals the intrinsic link between economic development and ecological protection.As the birthplace of this idea,representatives of Huzhou City in east China’s Zhejiang Province were invited to the 2025 United Nations High-Level Political Forum on Sustainable Development in New York on July 14.At the forum,Executive Vice Mayor Wang Zongming delivered a speech titled“Beautiful China,Dynamic Huzhou,”sharing the city’s sustainable development practices and stories in four aspects:ecology,industry,culture,and urban–rural integration.展开更多
In this article, we designed and synthesized a series of 5-（2,6-dimethyl-4H-pyran-4-ylidene）-1,3-diethyl-2-thioxodihydropyrimidine-4,6（1H, 5H）-dione（PD） unit based polymers（PFTDT, CZTDT, PHTDT and THTDT） for t...In this article, we designed and synthesized a series of 5-（2,6-dimethyl-4H-pyran-4-ylidene）-1,3-diethyl-2-thioxodihydropyrimidine-4,6（1H, 5H）-dione（PD） unit based polymers（PFTDT, CZTDT, PHTDT and THTDT） for the first time. In these polymers, fluorene, 2,7-carbazole, phenothiazine and thiophene are employed as electron-donating groups and PD as electron-withdrawing group. TGA measurements demonstrated that these polymers possess good thermal stability（all above 377 °C）. Very broad absorption spectrum was also obtained from the polymer THTDT（300？850 nm）. CV characterization found that these polymers owned low highest occupied molecular orbital（HOMO） energy levels（？5.39 e V for THTDT, ？5.49 e V for CZTDT and ？5.78 e V for PFTDT） except for PHTDT（？5.17 e V）. The geometry and electronic properties of PFTDT, CZTDT, PHTDT and THTDT were investigated by means of theoretical calculation. All the above advantages demonstrate that PD based polymers could be candidates for electronic devices.展开更多
文摘THIS year marks the 20th anniversary of the vision“lucid waters and lush mountains are invaluable assets,”which reveals the intrinsic link between economic development and ecological protection.As the birthplace of this idea,representatives of Huzhou City in east China’s Zhejiang Province were invited to the 2025 United Nations High-Level Political Forum on Sustainable Development in New York on July 14.At the forum,Executive Vice Mayor Wang Zongming delivered a speech titled“Beautiful China,Dynamic Huzhou,”sharing the city’s sustainable development practices and stories in four aspects:ecology,industry,culture,and urban–rural integration.
基金financially supported by the Research Program of 973 Program(No.2014CB643506)the National Natural Science Foundation of China(No.21401053)+2 种基金Project of Scientific Research and Development of Xiangyang(Year of 2013)Open Foundation of Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices(HLOM141003)Opening Project of Guangxi Colleges and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization(No.2014KLOG03)
文摘In this article, we designed and synthesized a series of 5-（2,6-dimethyl-4H-pyran-4-ylidene）-1,3-diethyl-2-thioxodihydropyrimidine-4,6（1H, 5H）-dione（PD） unit based polymers（PFTDT, CZTDT, PHTDT and THTDT） for the first time. In these polymers, fluorene, 2,7-carbazole, phenothiazine and thiophene are employed as electron-donating groups and PD as electron-withdrawing group. TGA measurements demonstrated that these polymers possess good thermal stability（all above 377 °C）. Very broad absorption spectrum was also obtained from the polymer THTDT（300？850 nm）. CV characterization found that these polymers owned low highest occupied molecular orbital（HOMO） energy levels（？5.39 e V for THTDT, ？5.49 e V for CZTDT and ？5.78 e V for PFTDT） except for PHTDT（？5.17 e V）. The geometry and electronic properties of PFTDT, CZTDT, PHTDT and THTDT were investigated by means of theoretical calculation. All the above advantages demonstrate that PD based polymers could be candidates for electronic devices.
